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Prof. Abd El-Fatah Abomohra
Chengdu University

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0 Biofuels
0 Microbiology
0 Renewable Energy
0 Sustainability
0 Waste Management

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Journal article
Published: 08 August 2021 in Materials
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Arthrospira platensis is one of the most important cultured microalgal species in the world. Arthrospira complete dry biomass (ACDB) has been reported as an interesting feedstock for many industries, including biodiesel production. The A. platensis by-product of biodiesel production (lipid-free biomass; LFB) is a source of proteins, functional molecules, and carbohydrates, and can also be reused in several applications. The current study investigated the efficiency of ACDB and LFB in bioremediation of dye (Ismate violet 2R, IV2R) from textile effluents. In addition, the potential of ACDB and LFB loaded by IV2R as a feed for Rotifer, Brachionus plicatilis, was examined. The surface of the adsorbents was characterized by SEM, FTIR, and Raman analysis to understand the adsorption mechanism. The batch sorption method was examined as a function of adsorbent dose (0.02–0.01 g L−1), solution initial concentration (10–100 mg L−1), pH (2–10), and contact time (15–180 min). The kinetic studies and adsorption isotherm models (Freundlich, Langmuir, Tempkin, and Halsey) were used to describe the interaction between dye and adsorbents. The results concluded that the adsorption process increased with increasing ACDB and LFB dose, contact time (120 min), initial IV2R concentration (10 mg L−1), and acidity pH (2 and 6, respectively). For the elimination of industrial textile wastewater, the ACDB and LFB sorbents have good elimination ability of a dye solution by 75.7% and 61.11%, respectively. The kinetic interaction between dye and adsorbents fitted well to Langmuir, Freundlish, and Halsey models for LFB, and Langmuir for ACDB at optimum conditions with R2 > 0.9. In addition, based on the bioassay study, the ACDB and LFB loaded by IV2R up to 0.02 g L−1 may be used as feed for the marine Rotifer B. plicatilis.

ACS Style

Ahmed Alprol; Ahmed Heneash; Mohamed Ashour; Khamael Abualnaja; Dalal Alhashmialameer; Abdallah Mansour; Zaki Sharawy; Mouhamed Abu-Saied; Abd Abomohra. Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis). Materials 2021, 14, 4446 .

AMA Style

Ahmed Alprol, Ahmed Heneash, Mohamed Ashour, Khamael Abualnaja, Dalal Alhashmialameer, Abdallah Mansour, Zaki Sharawy, Mouhamed Abu-Saied, Abd Abomohra. Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis). Materials. 2021; 14 (16):4446.

Chicago/Turabian Style

Ahmed Alprol; Ahmed Heneash; Mohamed Ashour; Khamael Abualnaja; Dalal Alhashmialameer; Abdallah Mansour; Zaki Sharawy; Mouhamed Abu-Saied; Abd Abomohra. 2021. "Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis)." Materials 14, no. 16: 4446.

Journal article
Published: 15 July 2021 in Journal of Cleaner Production
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Seaweeds have been used in many biotechnological applications including animal feed, human food, cosmetics, fertilizers, and bioremediation. With respect to bioremediation, seaweeds contaminated with heavy metals have limited applications and most suited for biofuel production. The present study aimed to evaluate the potential of seaweeds for dual use in heavy metal biosorption and biofuel production. Three dominant seaweed genera were collected representing the three macroalgal phyla, namely Ulva spp. (Chlorophyte), Gracilaria spp. (Rhodophyte), and Sargassum spp. (Phaeophyte). The later showed the highest cumulative copper (Cu2+) biosorption with 80% removal efficiency, which increased to 94.6% after process optimization. Comparative fermentation of raw biomass (RB) and Cu-sorbed biomass (BHM) showed the highest bioethanol yield of 289.2 mg g−1 for RB at 72 h fermentation, which was 24.3% higher than that of BHM. In addition, the presence of Cu2+ in the BHM showed significant reduction in biogas and biomethane yields by 18.4% and 5.2%, respectively, with respect to RB. However, fermented BHM showed higher biogas and biomethane yields than the fermented RB. Due to dual bioethanol and biogas production, sequential fermentation and anaerobic digestion of Cu-sorbed biomass showed the highest energy output of 1597.3 GJ year−1. The present study suggests a novel approach that provides an integrated method for efficient utilization of seaweeds biomass in wastewater treatment and sustainable energy recovery.

ACS Style

Abd El-Fatah Abomohra; Mohamed E. El-Hefnawy; Qingyuan Wang; Jin Huang; Li Li; Jialing Tang; Soha Mohammed. Sequential bioethanol and biogas production coupled with heavy metal removal using dry seaweeds: Towards enhanced economic feasibility. Journal of Cleaner Production 2021, 316, 128341 .

AMA Style

Abd El-Fatah Abomohra, Mohamed E. El-Hefnawy, Qingyuan Wang, Jin Huang, Li Li, Jialing Tang, Soha Mohammed. Sequential bioethanol and biogas production coupled with heavy metal removal using dry seaweeds: Towards enhanced economic feasibility. Journal of Cleaner Production. 2021; 316 ():128341.

Chicago/Turabian Style

Abd El-Fatah Abomohra; Mohamed E. El-Hefnawy; Qingyuan Wang; Jin Huang; Li Li; Jialing Tang; Soha Mohammed. 2021. "Sequential bioethanol and biogas production coupled with heavy metal removal using dry seaweeds: Towards enhanced economic feasibility." Journal of Cleaner Production 316, no. : 128341.

Journal article
Published: 23 June 2021 in Renewable and Sustainable Energy Reviews
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Waste-to-energy is a promising approach to tackle the energy shortage and reduce the environmental pollution. The present study aimed to evaluate the technical and economic feasibility of microwave vacuum co-pyrolysis of seaweeds and low-density polyethylene (LDPE). Although the three studied seaweeds namely; Ulva intestinalis, Sargassum polycystum, and Hypnea valentiae showed similar thermal weight loss profile, U. intestinalis showed the highest biomass and bio-oil yields which resulted in superior bio-oil areal productivity of 30.1 g m−2. Therefore, it was selected for co-pyrolysis with LDPE at different blend ratios. Compared to individual pyrolysis of U. intestinalis, the increase inLDPE ratio enhanced the crude bio-oil production with simultaneous reduction in bio-char yield. The experimental bio-oil yields from co-pyrolysis showed higher values than the corresponding theoretical values, confirming a synergistic effect between the two feedstocks. The bio-oil produced from co-pyrolysis at 75% LDPE blend ratio showed better characteristics compared to the individual pyrolysis. Van Krevelen plot suggested that LDPE produces hydrogen radicals during co-pyrolysis reactions, which increased the H/C ratio and reduced the O/C ratio. GC/MS analysis confirmed that the increase in LDPE stimulates hydrocarbons proportion up to 51.2% at 75% blend ratio with significant reduction in N-containing compounds, carboxylic acids, furans, aldehydes/ketones, saccharides, and phenols. The economic feasibility analysis at a feedstock feeding rate of 11.4 ton h−1 using Aspen Plus showed estimated net profit of 23.17 million US$ for a 20-years life time plant. The present study provides a potential approach for sustainable energy recovery from waste plastic/seaweeds blend using microwave vacuum co-pyrolysis.

ACS Style

Abd El-Fatah Abomohra; Huda M.A. Sheikh; Amal H. El-Naggar; Qingyuan Wang. Microwave vacuum co-pyrolysis of waste plastic and seaweeds for enhanced crude bio-oil recovery: Experimental and feasibility study towards industrialization. Renewable and Sustainable Energy Reviews 2021, 149, 111335 .

AMA Style

Abd El-Fatah Abomohra, Huda M.A. Sheikh, Amal H. El-Naggar, Qingyuan Wang. Microwave vacuum co-pyrolysis of waste plastic and seaweeds for enhanced crude bio-oil recovery: Experimental and feasibility study towards industrialization. Renewable and Sustainable Energy Reviews. 2021; 149 ():111335.

Chicago/Turabian Style

Abd El-Fatah Abomohra; Huda M.A. Sheikh; Amal H. El-Naggar; Qingyuan Wang. 2021. "Microwave vacuum co-pyrolysis of waste plastic and seaweeds for enhanced crude bio-oil recovery: Experimental and feasibility study towards industrialization." Renewable and Sustainable Energy Reviews 149, no. : 111335.

Journal article
Published: 22 June 2021 in Journal of Environmental Chemical Engineering
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Anaerobic digestion (AD) is a biological process, encompasses the treatment and stabilization of complex organic matter to extract renewable biomethane fuel through microbial interaction in the digester. The main aim of the current study is to investigate the microbial community of anaerobic digestion sludge (ADS), collected at different periods from a mesophilic operating anaerobic digester. The core group of bacteria in ADS including Firmicutes, Bacteroidetes, and Proteobacteria represented more than 60% of the core bacterial community. In ADS (I), the supremacy of Cloacimonetes (18%) was also observed. In ADS (II), the dominance of Anaerobacter (8%) showed the effect of substrate composition on the microbial structure. However, 91% relative abundance of Firmicutes was observed in ADS (III). The hydrogenotrophic methanogens belonging to order Methanomicrobiales and Methanobacteriales exhibited dominance in all three ADSs (> 60%). No specific variations in the archaeal community might be attributed to the presence of beneficial bacterial species. This study provides all the detailed functional roles of microbes involved in AD which can further be used for additional environmental applications.

ACS Style

Adel I. Alalawy; Zhaodi Guo; Fahad M. Almutairi; Haddad A. El Rabey; Mohammed A. Al-Duais; Ghena M. Mohammed; Fahad M. Almasoudi; Maeidh A. Alotaibi; El-Sayed Salama; Abd El-Fatah Abomohra; Mohamed I. Sakran. Explication of structural variations in the bacterial and archaeal community of anaerobic digestion sludges: An insight through metagenomics. Journal of Environmental Chemical Engineering 2021, 9, 105910 .

AMA Style

Adel I. Alalawy, Zhaodi Guo, Fahad M. Almutairi, Haddad A. El Rabey, Mohammed A. Al-Duais, Ghena M. Mohammed, Fahad M. Almasoudi, Maeidh A. Alotaibi, El-Sayed Salama, Abd El-Fatah Abomohra, Mohamed I. Sakran. Explication of structural variations in the bacterial and archaeal community of anaerobic digestion sludges: An insight through metagenomics. Journal of Environmental Chemical Engineering. 2021; 9 (5):105910.

Chicago/Turabian Style

Adel I. Alalawy; Zhaodi Guo; Fahad M. Almutairi; Haddad A. El Rabey; Mohammed A. Al-Duais; Ghena M. Mohammed; Fahad M. Almasoudi; Maeidh A. Alotaibi; El-Sayed Salama; Abd El-Fatah Abomohra; Mohamed I. Sakran. 2021. "Explication of structural variations in the bacterial and archaeal community of anaerobic digestion sludges: An insight through metagenomics." Journal of Environmental Chemical Engineering 9, no. 5: 105910.

Journal article
Published: 24 February 2021 in Construction and Building Materials
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The accelerated carbonation technology has been utilized in order to enhance the properties of the recycled concrete aggregates (RCAs) and efficient sequestration of carbon dioxide. Numerous studies have been conducted on this developing technology, while there are few systematic reviews on this method. In the present paper, the reaction processes, influencing factors and mechanisms of the accelerated carbonation to treat RCAs are summarized. The quality of carbonated RCAs and the properties of concrete incorporating carbonated RCAs are evaluated. Moreover, the environmental impacts and economic feasibility of this technique are analyzed. Results showed that carbon dioxide could react with calcium hydroxide, calcium silicate hydrates and other calcium substances in RCAs leading to the precipitation of calcium carbonate. The carbonation processes were mainly determined by carbonation conditions and RCAs characteristics. Carbonated RCAs exhibited lower water absorption, lower crush value and higher apparent density than the non-carbonated ones. The mechanical properties and durability of the concrete containing carbonated RCAs were also improved significantly. This technology has been also confirmed an environmentally friendly and economically feasible method. Finally, some research perspectives on this technology are presented.

ACS Style

Yunhui Pu; Lang Li; Qingyuan Wang; Xiaoshuang Shi; Chenchen Luan; Guomin Zhang; Ling Fu; Abd El-Fatah Abomohra. Accelerated carbonation technology for enhanced treatment of recycled concrete aggregates: A state-of-the-art review. Construction and Building Materials 2021, 282, 122671 .

AMA Style

Yunhui Pu, Lang Li, Qingyuan Wang, Xiaoshuang Shi, Chenchen Luan, Guomin Zhang, Ling Fu, Abd El-Fatah Abomohra. Accelerated carbonation technology for enhanced treatment of recycled concrete aggregates: A state-of-the-art review. Construction and Building Materials. 2021; 282 ():122671.

Chicago/Turabian Style

Yunhui Pu; Lang Li; Qingyuan Wang; Xiaoshuang Shi; Chenchen Luan; Guomin Zhang; Ling Fu; Abd El-Fatah Abomohra. 2021. "Accelerated carbonation technology for enhanced treatment of recycled concrete aggregates: A state-of-the-art review." Construction and Building Materials 282, no. : 122671.

Journal article
Published: 13 January 2021 in Scientific Reports
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Hyperthermophilic Thermotoga spp. are excellent candidates for the biosynthesis of cellulosic ethanol producing strains because they can grow optimally at 80 °C with ability to degrade and utilize cellulosic biomass. In T. neapolitana (Tne), a putative iron-containing alcohol dehydrogenase was, for the first time, revealed to be a bifunctional aldehyde/alcohol dehydrogenase (Fe-AAdh) that catalyzed both reactions from acetyl-coenzyme A (ac-CoA) to acetaldehyde (ac-ald), and from ac-ald to ethanol, while the putative aldehyde dehydrogenase (Aldh) exhibited only CoA-independent activity that oxidizes ac-ald to acetic acid. The biochemical properties of Fe-AAdh were characterized, and bioinformatics were analyzed. Fe-AAdh exhibited the highest activities for the reductions of ac-CoA and acetaldehyde at 80–85 °C, pH 7.54, and had a 1-h half-life at about 92 °C. The Fe-AAdh gene is highly conserved in Thermotoga spp., Pyrococcus furiosus and Thermococcus kodakarensis, indicating the existence of a fermentation pathway from ac-CoA to ethanol via acetaldehyde as the intermediate in hyperthermophiles.

ACS Style

Qiang Wang; Chong Sha; Hongcheng Wang; Kesen Ma; Juergen Wiegle; Abd El-Fatah Abomohra; Weilan Shao. A novel bifunctional aldehyde/alcohol dehydrogenase catalyzing reduction of acetyl-CoA to ethanol at temperatures up to 95 °C. Scientific Reports 2021, 11, 1 -9.

AMA Style

Qiang Wang, Chong Sha, Hongcheng Wang, Kesen Ma, Juergen Wiegle, Abd El-Fatah Abomohra, Weilan Shao. A novel bifunctional aldehyde/alcohol dehydrogenase catalyzing reduction of acetyl-CoA to ethanol at temperatures up to 95 °C. Scientific Reports. 2021; 11 (1):1-9.

Chicago/Turabian Style

Qiang Wang; Chong Sha; Hongcheng Wang; Kesen Ma; Juergen Wiegle; Abd El-Fatah Abomohra; Weilan Shao. 2021. "A novel bifunctional aldehyde/alcohol dehydrogenase catalyzing reduction of acetyl-CoA to ethanol at temperatures up to 95 °C." Scientific Reports 11, no. 1: 1-9.

Review article
Published: 17 December 2020 in Biomass and Bioenergy
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Reducing carbon dioxide (CO2) emissions has been a hot research topic in recent years. The integration of microalgae cultivation using CO2 from power plants and factories has been introduced as an environmentally friendly approach. However, strains with high biomass productivity are required to achieve a sustainable integrated platform. Improving photosynthesis is critical to increase both biomass productivity and CO2 sequestration efficiency. The improvement of photosynthesis is often attained by enhancing the efficiency of enzymes that are involved in CO2 fixation, reducing the antenna size to avoid energy loss, extending the photosynthetically active radiation range to broaden the light utilization capacity, increasing CO2 assimilation by replacing the existing carbon fixation pathway with more efficient pathways and enzymes, and reducing the release of captured CO2. Implementation of these modifications is achievable via transformation and gene editing. The transformation of the new gene constructs into microalgae has been discussed as an extremely challenging task in the past decade. In recent studies, the digestion of the microalgae cell wall, as one of the main barriers of transformation, has been recommended as a promising approach. Moreover, the emergence of preassembled Cas9 protein-gRNA ribonucleoproteins that do not require vector constructs has been suggested as an efficient approach for gene editing. This review comprehensively describes the potential strategies that enhance microalgae CO2 fixation, provides insight into current limitations and gaps, and proposes future perspectives.

ACS Style

Bahram Barati; Kuo Zeng; Jan Baeyens; Shuang Wang; Min Addy; Sook-Yee Gan; Abd El-Fatah Abomohra. Recent progress in genetically modified microalgae for enhanced carbon dioxide sequestration. Biomass and Bioenergy 2020, 145, 105927 .

AMA Style

Bahram Barati, Kuo Zeng, Jan Baeyens, Shuang Wang, Min Addy, Sook-Yee Gan, Abd El-Fatah Abomohra. Recent progress in genetically modified microalgae for enhanced carbon dioxide sequestration. Biomass and Bioenergy. 2020; 145 ():105927.

Chicago/Turabian Style

Bahram Barati; Kuo Zeng; Jan Baeyens; Shuang Wang; Min Addy; Sook-Yee Gan; Abd El-Fatah Abomohra. 2020. "Recent progress in genetically modified microalgae for enhanced carbon dioxide sequestration." Biomass and Bioenergy 145, no. : 105927.

Technical note
Published: 04 November 2020 in International Journal of Energy Research
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In the present study, eight seaweeds (five red, two brown and one green) were collected and evaluated for dual biodiesel and/or bioethanol production. The highest significant lipid and carbohydrate contents were recorded in the brown seaweed Dilophus fasciola (4.92 and 37.97%dw, respectively). Three routes were investigated, namely R1 and R2 for direct production of biodiesel and bioethanol, respectively, from the whole biomass, in addition to R3 representing the sequential biodiesel and bioethanol production. D. fasciola showed a biodiesel yield of 35.04 mg g−1 dw, composed mainly of C16‐C18 fatty acids with a high saturation degree. All biodiesel characteristics complied with the recommended values of international standards. The maximum reducing sugar content (37.2 g L−1) and bioethanol productivity at 72 hours (0.165 g L−1 h−1) were recorded in the lipid‐free biomass (R3), which were 16.3% and 27.9%, respectively, higher than that of R2. Therefore, a maximum estimated total energy output of 9.96 MJ kg−1 was recorded in R3, which represented 6‐times and 28.3% higher than R1 and R2, respectively.

ACS Style

Mostafa E. Elshobary; Rania A. El‐Shenody; Abd El‐Fatah Abomohra. Sequential biofuel production from seaweeds enhances the energy recovery: A case study for biodiesel and bioethanol production. International Journal of Energy Research 2020, 45, 6457 -6467.

AMA Style

Mostafa E. Elshobary, Rania A. El‐Shenody, Abd El‐Fatah Abomohra. Sequential biofuel production from seaweeds enhances the energy recovery: A case study for biodiesel and bioethanol production. International Journal of Energy Research. 2020; 45 (4):6457-6467.

Chicago/Turabian Style

Mostafa E. Elshobary; Rania A. El‐Shenody; Abd El‐Fatah Abomohra. 2020. "Sequential biofuel production from seaweeds enhances the energy recovery: A case study for biodiesel and bioethanol production." International Journal of Energy Research 45, no. 4: 6457-6467.

Short communication
Published: 14 October 2020 in International Journal of Energy Research
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In the present study, valorization of food and lignocellulosic wastes into biodiesel and 2‐phenylethanol using Metchinikowia pulcherrima isolated from rotten food wastes was evaluated. At the optimum pH of 5.5, food waste hydrolysate (FWH) showed 74.1% higher dry weight than the corresponding synthetic medium. Rice straw (RS) and softwood sawdust (WWA) were used as additional carbon sources to increase the C:N ratio of FWH. WWA enhanced the biomass production by 23.3% and 55.9% over the corresponding RS and FWH, respectively; while RS enhanced lipid accumulation. Due to enhancement of growth, 75 g WWA showed the maximum recorded lipid productivity of 2.49 g L−1 d−1. Interestingly, both hexoses and pentoses were effectively metabolized. Regarding fatty acid profile of M. pulcherrima, RS‐ and WWA‐enriched growth media showed higher saturated fatty acids proportions (56.9% and 98.3%, respectively, over that of FWH), with better biodiesel characteristics. FWH showed the heights significant production of 2‐phenylethanol up to 56.7 mg L−1 after 96 hours. However, FWH enriched with WWA showed the highest gross energy output of 33.98 GJ m−3 y−1. Thus, the present study suggested an integrated approach of M. pulcherrima cultivation on FWH enriched with WWA for efficient biofuel production through waste recycling.

ACS Style

Abd El‐Fatah Abomohra; Qingyuan Wang; Jin Huang; Khalil M. Saad‐Allah. A sustainable approach for bioconversion of food and lignocellulosic wastes into liquid biofuel using a new Metschnikowia pulcherrima isolate. International Journal of Energy Research 2020, 45, 3430 -3441.

AMA Style

Abd El‐Fatah Abomohra, Qingyuan Wang, Jin Huang, Khalil M. Saad‐Allah. A sustainable approach for bioconversion of food and lignocellulosic wastes into liquid biofuel using a new Metschnikowia pulcherrima isolate. International Journal of Energy Research. 2020; 45 (2):3430-3441.

Chicago/Turabian Style

Abd El‐Fatah Abomohra; Qingyuan Wang; Jin Huang; Khalil M. Saad‐Allah. 2020. "A sustainable approach for bioconversion of food and lignocellulosic wastes into liquid biofuel using a new Metschnikowia pulcherrima isolate." International Journal of Energy Research 45, no. 2: 3430-3441.

Journal article
Published: 17 August 2020 in Bioresource Technology
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The aim of this work was to evaluate a novel integrated biorefinery route for enhanced energy recovery from seaweeds and microalgae. Agar extraction prior to anaerobic digestion recorded the highest biogas productivity of 32.57 L kg−1 VS d−1. Supplementation of the microalgal growth medium with anaerobic digestate from agar-extracted biomass enhanced the microalgal growth, recording the highest dry weight of 4.57 g L−1 at 20% digestate ratio. In addition, lipid content showed the highest value of 25.8 %dw. Due to enhancement of growth and lipid content, 20% digestate ratio showed the highest lipid productivity and FAMEs recovery (65.2 mg L−1 d−1 and 123.3 mg g−1dw, respectively), with enhanced biodiesel characteristics. The present study estimated annual revenue of 1252.7 US$ ton−1 from the whole Gracilaria multipartita biomass conversion into biogas, while that through agar extraction deserved 36087.0 US$ ton−1, with enhanced annual biodiesel yield by 69.7% over the control medium.

ACS Style

Abd El-Fatah Abomohra; Adel Almutairi. A close-loop integrated approach for microalgae cultivation and efficient utilization of agar-free seaweed residues for enhanced biofuel recovery. Bioresource Technology 2020, 317, 124027 .

AMA Style

Abd El-Fatah Abomohra, Adel Almutairi. A close-loop integrated approach for microalgae cultivation and efficient utilization of agar-free seaweed residues for enhanced biofuel recovery. Bioresource Technology. 2020; 317 ():124027.

Chicago/Turabian Style

Abd El-Fatah Abomohra; Adel Almutairi. 2020. "A close-loop integrated approach for microalgae cultivation and efficient utilization of agar-free seaweed residues for enhanced biofuel recovery." Bioresource Technology 317, no. : 124027.

Review
Published: 03 August 2020 in Energy Conversion and Management
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Due to the negative environmental impacts of fossil fuels and the increasing global energy demands, biofuels are receiving increasing attention as the best short-term substitute for petroleum. Recently, thermochemical conversion of seaweeds is in industrial focus to obtain high-value products with more potential applications than the conventional raw material. Beside biofuel production and due to their autotrophic growth, seaweeds are receiving a great attention in the field of bioremediation. Thus, pyrolysis of seaweeds is a promising approach for renewable bio-oil production with positive environmental impacts. However, a pretreatment drying step is required to improve the conversion process of the biomass. Application of electro-osmotic dewatering as well as on-site mechanical dewatering methods prior to the drying process were reported as useful techniques to reduce the energy requirements. On the other hand, the bio-oil produced from pyrolysis of seaweeds usually has high contents of oxygen-, nitrogen- and sulphur-containing compounds, which should be as minimum as possible to enhance the bio-oil stability and reduce NOx and SOx emissions. The present review introduces a suggested route combining a number of technologies that create an economically-feasible process for conversion of seaweeds to high-grade crude bio-oil through pyrolysis. In addition, the paper sheds light on the environmental impacts and economic feasibility of the crude bio-oil production from seaweeds. The current status and challenges related to pyrolysis, as well as future perspectives for enhanced conversion and upgraded bio-oil production, are discussed.

ACS Style

Shuang Wang; Shuang Zhao; Benjamin Bernard Uzoejinwa; Anqing Zheng; Qingyuan Wang; Jin Huang; Abd El-Fatah Abomohra. A state-of-the-art review on dual purpose seaweeds utilization for wastewater treatment and crude bio-oil production. Energy Conversion and Management 2020, 222, 113253 .

AMA Style

Shuang Wang, Shuang Zhao, Benjamin Bernard Uzoejinwa, Anqing Zheng, Qingyuan Wang, Jin Huang, Abd El-Fatah Abomohra. A state-of-the-art review on dual purpose seaweeds utilization for wastewater treatment and crude bio-oil production. Energy Conversion and Management. 2020; 222 ():113253.

Chicago/Turabian Style

Shuang Wang; Shuang Zhao; Benjamin Bernard Uzoejinwa; Anqing Zheng; Qingyuan Wang; Jin Huang; Abd El-Fatah Abomohra. 2020. "A state-of-the-art review on dual purpose seaweeds utilization for wastewater treatment and crude bio-oil production." Energy Conversion and Management 222, no. : 113253.

Review
Published: 23 June 2020 in Progress in Energy and Combustion Science
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Wastewater discharges from restaurants, kitchens, food processing plants and slaughterhouses contain high proportion of fat, oil, and grease (FOG). Critical overview on the attractive features, current state, and needed advancements are timely essential for FOG-derived biodiesel production. Although FOG conversion into biodiesel does not compete with human food, the high contents of moisture and free fatty acids (FFAs) are the main challenges for FOG efficient utilization. The present review discussed the various methods of high FFAs-lipidic feedstocks pretreatment including acid esterification, steam stripping, nanocatalytic technology, biological conversion, glycerolysis, supercritical esterification, and simultaneous in situ conversion. Comparing to other feedstocks, FOG-derived biodiesel showed better characteristics concerning oxidative stability, flash point, cetane number, and total emissions. In addition, most of the FOG-derived biodiesel fuel met the recommendations of the international standards as well as conventional diesel. Due to its lower price, the economic analysis showed that FOG is a strong competitor to other biodiesel feedstocks. The decrease in feedstocks availability, continuous rise in the crude oil prices, life threatening environmental deterioration, and food-versus-fuel debate support FOG to be a potential biodiesel feedstock in the near future. However, the cost of FOG-biodiesel production is still far away from the acceptable ranges to compete fossil diesel. Lastly, this paper suggested a number of future perspectives in order to enhance the economy and feasibility of FOG-derived biodiesel including developing new methods for efficient conversion of brown grease, integrated approaches for sequential production of biofuels from FOG, and co-esterification of FOG with other lipidic feedstocks.

ACS Style

Abd El-Fatah Abomohra; Mahdy Elsayed; Sivakumar Esakkimuthu; Mostafa El-Sheekh; Dieter Hanelt. Potential of fat, oil and grease (FOG) for biodiesel production: A critical review on the recent progress and future perspectives. Progress in Energy and Combustion Science 2020, 81, 100868 .

AMA Style

Abd El-Fatah Abomohra, Mahdy Elsayed, Sivakumar Esakkimuthu, Mostafa El-Sheekh, Dieter Hanelt. Potential of fat, oil and grease (FOG) for biodiesel production: A critical review on the recent progress and future perspectives. Progress in Energy and Combustion Science. 2020; 81 ():100868.

Chicago/Turabian Style

Abd El-Fatah Abomohra; Mahdy Elsayed; Sivakumar Esakkimuthu; Mostafa El-Sheekh; Dieter Hanelt. 2020. "Potential of fat, oil and grease (FOG) for biodiesel production: A critical review on the recent progress and future perspectives." Progress in Energy and Combustion Science 81, no. : 100868.

Research article
Published: 06 June 2020 in Environmental Science and Pollution Research
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The present study evaluated the sequential biodiesel-bioethanol production from seaweeds. A total of 22 macroalgal species were collected at different seasons and screened based on lipid and carbohydrate contents as well as biomass production. The promising species was selected, based on the relative increase in energy compounds (REEC, %), for further energy conversion. Seasonal and annual biomass yields of the studied species showed significant variations. The rhodophyte Amphiroa compressa and the chlorophyte Ulva intestinalis showed the highest annual biomass yield of 75.2 and 61.5 g m−2 year−1, respectively. However, the highest annual carbohydrate productivity (ACP) and annual lipid productivity (ALP) were recorded for Ulva fasciata and Ulva intestinalis (17.0 and 3.0 g m−2 year−1, respectively). The later was selected for further studies because it showed 14.8% higher REEC value than Ulva fasciata. Saturated fatty acids (SAFs) showed 73.4%, with palmitic acid as a dominant fatty acid (43.8%). Therefore, biodiesel showed high saturation degree, with average degree of unsaturation (ADU) of 0.508. All the measured biodiesel characteristics complied the international standards. The first route of biodiesel production (R1) from Ulva intestinalis showed biodiesel recovery of 32.3 mg g−1 dw. The hydrolysate obtained after saccharification of the whole biomass (R2) and lipid-free biomass (R3) contained 1.22 and 1.15 g L−1, respectively, reducing sugars. However, bioethanol yield from R3 was 0.081 g g−1 dw, which represented 14.1% higher than that of R2. Therefore, application of sequential biofuel production using R3 resulted in gross energy output of 3.44 GJ ton−1 dw, which was 170.9% and 82.0% higher than R1 and R2, respectively. The present study recommended the naturally-grown Ulva intestinalis as a potential feedstock for enhanced energy recovery through sequential biodiesel-bioethanol production.

ACS Style

Mohamed E. H. Osman; Atef M. Abo-Shady; Mostafa E. ElShobary; Mahasen O. Abd El-Ghafar; Abd El-Fatah Abomohra. Screening of seaweeds for sustainable biofuel recovery through sequential biodiesel and bioethanol production. Environmental Science and Pollution Research 2020, 27, 32481 -32493.

AMA Style

Mohamed E. H. Osman, Atef M. Abo-Shady, Mostafa E. ElShobary, Mahasen O. Abd El-Ghafar, Abd El-Fatah Abomohra. Screening of seaweeds for sustainable biofuel recovery through sequential biodiesel and bioethanol production. Environmental Science and Pollution Research. 2020; 27 (26):32481-32493.

Chicago/Turabian Style

Mohamed E. H. Osman; Atef M. Abo-Shady; Mostafa E. ElShobary; Mahasen O. Abd El-Ghafar; Abd El-Fatah Abomohra. 2020. "Screening of seaweeds for sustainable biofuel recovery through sequential biodiesel and bioethanol production." Environmental Science and Pollution Research 27, no. 26: 32481-32493.

Journal article
Published: 22 May 2020 in Critical Reviews in Biotechnology
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Recently, lipidic wastes have been reported to enhance biomethane production through anaerobic co-digestion (ACD). These lipidic wastes were of animal and plant origins. The comparison of animal and plant lipidic wastes with the microbial communities involved in lipid degradation have not been given adequate attention in pervious reviews. However, there is need to demonstrate the differences between these wastes in terms of their long-chain fatty acids (LCFAs) composition, nature, and availability. This review discusses the characterization and comparison of animal and plant lipidic wastes as co-substrates, while summarizing the potential of biomethane production in the laboratory, as well as pilot and full-scale operations. The degradation kinetics of LCFAs existing in animal and plant lipidic wastes were also highlighted during the operation process, along with the challenges (such as inhibition by LCFAs, sludge washout, sludge flotation, and foaming). Discussion on the use of the next gene sequencing (NGS) for the microbial community in the ACD of lipidic wastes was considered to understand the interspecies interactions among various microbes. The economic feasibility of lipidic wastes in the ACD along with biogas yield has also been evaluated. The use of lipids (animal and plant based) in anaerobic digestion with the application of combined pretreatment or an acclimatized microbial consortium could be a potential approach for maximum energy recovery from the waste in terms of biomethane production.

ACS Style

Muhammad Usman; Lajia Zha; Abd El-Fatah Abomohra; Xiangkai Li; ChunJiang Zhang; El-Sayed Salama. Evaluation of animal- and plant-based lipidic waste in anaerobic digestion: kinetics of long-chain fatty acids degradation. Critical Reviews in Biotechnology 2020, 40, 733 -749.

AMA Style

Muhammad Usman, Lajia Zha, Abd El-Fatah Abomohra, Xiangkai Li, ChunJiang Zhang, El-Sayed Salama. Evaluation of animal- and plant-based lipidic waste in anaerobic digestion: kinetics of long-chain fatty acids degradation. Critical Reviews in Biotechnology. 2020; 40 (6):733-749.

Chicago/Turabian Style

Muhammad Usman; Lajia Zha; Abd El-Fatah Abomohra; Xiangkai Li; ChunJiang Zhang; El-Sayed Salama. 2020. "Evaluation of animal- and plant-based lipidic waste in anaerobic digestion: kinetics of long-chain fatty acids degradation." Critical Reviews in Biotechnology 40, no. 6: 733-749.

Journal article
Published: 17 May 2020 in Journal of Analytical and Applied Pyrolysis
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Bio-oil from microalgae has attracted attention for its extraordinary raw material utilization advantages and environmentally friendly characteristics. In order to increase the renewable energy utilization efficiency of microalgae biomass, research on the production line of microalgae cultivation and pyrolysis is essential. In this study, three high lipid content microalgae strains, including Micractinium reisseri, Scenedesmus obliquus SAG276-10 and Scenedesmus obliquus FACHB-276, have been selected to examine their capacity for crude bio-oil production under different pyrolysis conditions. The calculation of economic feasibility showed that M. reisseri comprised the most efficient energy conversion among considered strains. Gas Chromatography-Mass Spectrometry (GC–MS) analysis revealed a significant difference in the composition of crude bio-oil produced by non-catalytic and catalytic pyrolysis. The application of HZSM-5 increased the hydrocarbon content of the M. reisseri and S. obliquus FACHB-276 and decreased the ether and ester content of S. obliquus SAG276-10 upon pyrolysis when compared with non-catalytic pyrolysis. Although the use of MCM-41 was detrimental to the formation of hydrocarbons and increased the content of nitrogen-containing compounds, the mixture of HZSM-5 and MCM-41 greatly elevated the hydrocarbon content of S. obliquus SAG276-10 and S. obliquus FACHB-276.

ACS Style

Shuanhu Hu; Bahram Barati; Emmanuel Alepu Odey; Shuang Wang; Xun Hu; Abd El-Fatah Abomohra; Manogaran Lakshmikandan; Mukhambet Yerkebulan; Sivakumar Esakkimuthu; Hao Shang. Experimental study and economic feasibility analysis on the production of bio-oil by catalytic cracking of three kinds of microalgae. Journal of Analytical and Applied Pyrolysis 2020, 149, 104835 .

AMA Style

Shuanhu Hu, Bahram Barati, Emmanuel Alepu Odey, Shuang Wang, Xun Hu, Abd El-Fatah Abomohra, Manogaran Lakshmikandan, Mukhambet Yerkebulan, Sivakumar Esakkimuthu, Hao Shang. Experimental study and economic feasibility analysis on the production of bio-oil by catalytic cracking of three kinds of microalgae. Journal of Analytical and Applied Pyrolysis. 2020; 149 ():104835.

Chicago/Turabian Style

Shuanhu Hu; Bahram Barati; Emmanuel Alepu Odey; Shuang Wang; Xun Hu; Abd El-Fatah Abomohra; Manogaran Lakshmikandan; Mukhambet Yerkebulan; Sivakumar Esakkimuthu; Hao Shang. 2020. "Experimental study and economic feasibility analysis on the production of bio-oil by catalytic cracking of three kinds of microalgae." Journal of Analytical and Applied Pyrolysis 149, no. : 104835.

Journal article
Published: 15 May 2020 in Communications Biology
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Heavy metal contamination in food endangers human health. Probiotics can protect animals and human against heavy metals, but the detoxification mechanism has not been fully clarified. Here, mice were supplemented with Pediococcus acidilactici strain BT36 isolated from Tibetan plateau yogurt, with strong antioxidant activity but no chromate reduction ability for 20 days to ensure gut colonization. Strain BT36 decreased chromate accumulation, reduced oxidative stress, and attenuated histological damage in the liver of mice. 16S rRNA and metatranscriptome sequencing analysis of fecal microbiota showed that BT36 reversed Cr(VI)-induced changes in gut microbial composition and metabolic activity. Specifically, BT36 recovered the expressions of 788 genes, including 34 inherent Cr remediation-relevant genes. Functional analysis of 10 unannotated genes regulated by BT36 suggested the existence of a new Cr(VI)-reduction gene in the gut microbiota. Thus, BT36 can modulate the gut microbiota in response to Cr(VI) induced oxidative stress and protect against Cr toxicity.

ACS Style

Pengya Feng; Ze Ye; Huawen Han; Zhenmin Ling; Tuoyu Zhou; Shuai Zhao; Amanpreet Kaur Virk; Apurva Kakade; Abd El-Fatah Abomohra; Marwa M. El-Dalatony; Ei-Sayed Salama; Pu Liu; Xiangkai Li. Tibet plateau probiotic mitigates chromate toxicity in mice by alleviating oxidative stress in gut microbiota. Communications Biology 2020, 3, 1 -12.

AMA Style

Pengya Feng, Ze Ye, Huawen Han, Zhenmin Ling, Tuoyu Zhou, Shuai Zhao, Amanpreet Kaur Virk, Apurva Kakade, Abd El-Fatah Abomohra, Marwa M. El-Dalatony, Ei-Sayed Salama, Pu Liu, Xiangkai Li. Tibet plateau probiotic mitigates chromate toxicity in mice by alleviating oxidative stress in gut microbiota. Communications Biology. 2020; 3 (1):1-12.

Chicago/Turabian Style

Pengya Feng; Ze Ye; Huawen Han; Zhenmin Ling; Tuoyu Zhou; Shuai Zhao; Amanpreet Kaur Virk; Apurva Kakade; Abd El-Fatah Abomohra; Marwa M. El-Dalatony; Ei-Sayed Salama; Pu Liu; Xiangkai Li. 2020. "Tibet plateau probiotic mitigates chromate toxicity in mice by alleviating oxidative stress in gut microbiota." Communications Biology 3, no. 1: 1-12.

Journal article
Published: 12 May 2020 in Renewable Energy
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In the present study, biomass and lipid production of the biodiesel promising green microalga Tetradesmus obliquus BPL16 were studied by application of p-coumaric acid as a suggested novel growth regulator found predominantly in phenolics-rich streams. It was used in its pure form along with two phytohormones (jasmonic acid and salicylic acid). Using 100 μM jasmonic acid, 10 μM salicylic acid and 1 mM p-coumaric acid improved biomass production by 85.4%, 54.9% and 34.1%, respectively, over the control. In addition, significant increments in lipid content by 22%, 105.6%, and 145.4%, respectively, over the control were obtained at the aformentioned concentrations. Neutral lipids were significantly improved under elicitor-supplemented conditions. Moreover, fatty acid methyl esters (FAMEs) profile was also vitally influenced with drastic increase in oleic acid (C18:1) proportion by 81.7% and 73.6% over the control at 10 μM of jasmonic acid and 1 mM of p-coumaric acid, respectively. Application of p-coumaric acid resulted in estimated biodiesel energy output of 10.8 MJ kg−1 which represented 141% and 9.4% higher than the control and jasmonic acid, respectively. In conclusion, the present study suggested p-coumaric acid as a novel growth regulator for instant synchronized growth and lipid accumulation in microalgae for enhanced biodiesel production.

ACS Style

Sivakumar Esakkimuthu; Venkatesan Krishnamurthy; Shuang Wang; Xun Hu; Swaminathan K; Abd El-Fatah Abomohra. Application of p-coumaric acid for extraordinary lipid production in Tetradesmus obliquus: A sustainable approach towards enhanced biodiesel production. Renewable Energy 2020, 157, 368 -376.

AMA Style

Sivakumar Esakkimuthu, Venkatesan Krishnamurthy, Shuang Wang, Xun Hu, Swaminathan K, Abd El-Fatah Abomohra. Application of p-coumaric acid for extraordinary lipid production in Tetradesmus obliquus: A sustainable approach towards enhanced biodiesel production. Renewable Energy. 2020; 157 ():368-376.

Chicago/Turabian Style

Sivakumar Esakkimuthu; Venkatesan Krishnamurthy; Shuang Wang; Xun Hu; Swaminathan K; Abd El-Fatah Abomohra. 2020. "Application of p-coumaric acid for extraordinary lipid production in Tetradesmus obliquus: A sustainable approach towards enhanced biodiesel production." Renewable Energy 157, no. : 368-376.

Journal article
Published: 29 April 2020 in Bioresource Technology
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In the present study, a halophilic microalgal species was isolated from a hypersaline lagoon with salinity average of 45.3‰ and identified as Dunaliella salina KSA-HS022. It was further cultivated at a salinity range of 50–250‰, applied directly to batch cultures or through stepwise increase in a semi-continuous culture. The later showed the highest biomass productivity of 0.191 g L−1 d−1 at 125‰, which represented 45.8% higher than the corresponding batch culture (control). Oxidative markers in the control cultures were significantly higher than those of the adapted culture, confirming reduction of oxidative stress by adaptation. In addition, stepwise adaptation showed the highest lipid productivity of 56.5 mg L−1 d−1 at 150‰ (39.9% higher than the corresponding control), which resulted in the highest fatty acid methyl esters productivity. Moreover, stepwise increase of salinity up to 150‰ enhanced the biodiesel characteristics, offering a new route for enhanced biodiesel production at extraordinary salinity levels.

ACS Style

Abd El-Fatah Abomohra; Amal H. El-Naggar; Saleh O. Alaswad; Mahdy Elsayed; Mei Li; Wenyuan Li. Enhancement of biodiesel yield from a halophilic green microalga isolated under extreme hypersaline conditions through stepwise salinity adaptation strategy. Bioresource Technology 2020, 310, 123462 .

AMA Style

Abd El-Fatah Abomohra, Amal H. El-Naggar, Saleh O. Alaswad, Mahdy Elsayed, Mei Li, Wenyuan Li. Enhancement of biodiesel yield from a halophilic green microalga isolated under extreme hypersaline conditions through stepwise salinity adaptation strategy. Bioresource Technology. 2020; 310 ():123462.

Chicago/Turabian Style

Abd El-Fatah Abomohra; Amal H. El-Naggar; Saleh O. Alaswad; Mahdy Elsayed; Mei Li; Wenyuan Li. 2020. "Enhancement of biodiesel yield from a halophilic green microalga isolated under extreme hypersaline conditions through stepwise salinity adaptation strategy." Bioresource Technology 310, no. : 123462.

Journal article
Published: 11 April 2020 in Journal of Cleaner Production
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In the present study, a new biorefinery approach for efficient conversion of chicken manure mixed with rapeseed straw was investigated through anaerobic co-digestion though digestate recycling. The liquid digestate fraction was used for straw pretreatment, while solid fraction was utilized for rearing the black soldier fly larvae. Anaerobic digestion of raw straw resulted in biomethane yield of 144.2 L kg−1 VS, while the pretreatment enhanced it to 227.6 L kg−1 VS. Co-digestion of the pretreated straw with chicken manure at different ratios of 1:1, 1:3, and 3:1 increased the biomethane yield to 323.5, 349.6, and 262.3 L kg−1 VS, respectively, with higher biomethanation efficiency. Black soldier fly larvae were grown on different ratios of solid digestate/larva (D/L) of 0.25, 0.50, 0.75 and 1.00, where it showed higher growth and faster development by increasing the digestate ratio. In addition, lipid content significantly increased by increasing the digestate ratio, reaching the maximum values of 31.8 dw% at 1.00 D/L. Therefore, the highest fatty acid methyl esters recovery of 301.8 mg g−1 dw was recorded at 1.00 D/L, with pronounced enhanced biodiesel characteristics. The suggested integrated approach using a mixture of liquid digestate-pretreated straw to manure at a ratio of 1:3 for dual purpose of biogas and biodiesel production enhanced the gross bioenergy yield by 95.7%, 24.6%, and 38.7% over those of raw rapeseed straw, pretreated straw, or chicken manure, respectively. The present study demonstrates an innovative waste-to-energy route that will have a positive impact on the future of biofuel industry.

ACS Style

Mahdy Elsayed; Yi Ran; Ping Ai; Maha Azab; Abdelaziz Mansour; Keda Jin; Yanlin Zhang; Abd El-Fatah Abomohra. Innovative integrated approach of biofuel production from agricultural wastes by anaerobic digestion and black soldier fly larvae. Journal of Cleaner Production 2020, 263, 121495 .

AMA Style

Mahdy Elsayed, Yi Ran, Ping Ai, Maha Azab, Abdelaziz Mansour, Keda Jin, Yanlin Zhang, Abd El-Fatah Abomohra. Innovative integrated approach of biofuel production from agricultural wastes by anaerobic digestion and black soldier fly larvae. Journal of Cleaner Production. 2020; 263 ():121495.

Chicago/Turabian Style

Mahdy Elsayed; Yi Ran; Ping Ai; Maha Azab; Abdelaziz Mansour; Keda Jin; Yanlin Zhang; Abd El-Fatah Abomohra. 2020. "Innovative integrated approach of biofuel production from agricultural wastes by anaerobic digestion and black soldier fly larvae." Journal of Cleaner Production 263, no. : 121495.

Journal article
Published: 09 April 2020 in Journal of Cleaner Production
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The present study investigated the effect of solid digestates from first (FD) and second (SD) runs of anaerobic digestion on rice straw (S) degradation and biogas production. The results indicated that co-digestion of digestate (D) increases the relative lignin content in favor of cellulose and hemicellulose. In addition, digestate enhanced the biomethane content of biogas under both mesophilic and thermophilic conditions. Therefore, different ratios of D:S were further studied. The lowest fiber contents after mesophilic co-digestion (14.0% cellulose, 11.1% hemicellulose and 7.4% lignin) were recorded with FD:S 2:1, which showed insignificant differences with those of FD:S 1:1. Thermophilic anaerobic digestion resulted in slight changes in fiber content among all studied digestate ratios, which confirms that addition of digestate during thermophilic anaerobic digestion speeds up the rate of the process rather than fiber degradation. All applied digestate ratios resulted in shift in the time of maximum biogas production. Therefore, the maximum biogas productivities of 8.5 and 12.4 L kg−1 VS d−1 under mesophilic and thermophilic anaerobic co-digestion were recorded using 1:1 FD:S and 1:1 SD:S, which represented 46.6% and 25.3%, respectively, over the corresponding control. The present study suggests a novel approach of solid digestate recycling that enhances pH stabilization and biogas production.

ACS Style

Ping Ai; Mengdi Chen; Yi Ran; Keda Jin; Jingjing Peng; Abd El-Fatah Abomohra. Digestate recirculation through co-digestion with rice straw: Towards high biogas production and efficient waste recycling. Journal of Cleaner Production 2020, 263, 121441 .

AMA Style

Ping Ai, Mengdi Chen, Yi Ran, Keda Jin, Jingjing Peng, Abd El-Fatah Abomohra. Digestate recirculation through co-digestion with rice straw: Towards high biogas production and efficient waste recycling. Journal of Cleaner Production. 2020; 263 ():121441.

Chicago/Turabian Style

Ping Ai; Mengdi Chen; Yi Ran; Keda Jin; Jingjing Peng; Abd El-Fatah Abomohra. 2020. "Digestate recirculation through co-digestion with rice straw: Towards high biogas production and efficient waste recycling." Journal of Cleaner Production 263, no. : 121441.