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Anaerobic digestion (AD) is a biological-based technology that generates methane-enriched biogas. A microbial electrolysis cell (MEC) uses electricity to initiate bacterial oxidization of organic matter to produce hydrogen. This study determined the effect of energy production and waste treatment when using dairy manure in a combined AD and MEC (AD-MEC) system compared to AD without MEC (AD-only). In the AD-MEC system, a single chamber MEC (150 mL) was placed inside a 10 L digester on day 20 of the digestion process and run for 272 h (11 days) to determine residual treatment and energy capacity with an MEC included. Cumulative H2 and CH4 production in the AD-MEC (2.43 L H2 and 23.6 L CH4) was higher than AD-only (0.00 L H2 and 10.9 L CH4). Hydrogen concentration during the first 24 h of MEC introduction constituted 20% of the produced biogas, after which time the H2 decreased as the CH4 concentration increased from 50% to 63%. The efficiency of electrical energy recovery (ηE) in the MEC was 73% (ηE min.) to 324% (ηE max.), with an average increase of 170% in total energy compared to AD-only. Chemical oxygen demand (COD) removal was higher in the AD-MEC (7.09 kJ/g COD removed) system compared to AD-only (6.19 kJ/g COD removed). This study showed that adding an MEC during the digestion process could increase overall energy production and organic removal from dairy manure.
Amro Hassanein; Freddy Witarsa; Stephanie Lansing; Ling Qiu; Yong Liang. Bio-electrochemical Enhancement of Hydrogen and Methane Production in a Combined Anaerobic Digester (AD) and Microbial Electrolysis Cell (MEC) from Dairy Manure. Sustainability 2020, 12, 8491 .
AMA StyleAmro Hassanein, Freddy Witarsa, Stephanie Lansing, Ling Qiu, Yong Liang. Bio-electrochemical Enhancement of Hydrogen and Methane Production in a Combined Anaerobic Digester (AD) and Microbial Electrolysis Cell (MEC) from Dairy Manure. Sustainability. 2020; 12 (20):8491.
Chicago/Turabian StyleAmro Hassanein; Freddy Witarsa; Stephanie Lansing; Ling Qiu; Yong Liang. 2020. "Bio-electrochemical Enhancement of Hydrogen and Methane Production in a Combined Anaerobic Digester (AD) and Microbial Electrolysis Cell (MEC) from Dairy Manure." Sustainability 12, no. 20: 8491.
Biological desulfurization of biogas from a field-scale anaerobic digester in Peru was tested using air injection (microaeration) in separate duplicate vessels and chemical desulfurization using duplicate iron filters to compare hydrogen sulfide (H2S) reduction, feasibility, and cost. Microaeration was tested after biogas retention times of 2 and 4 h after a single injection of ambient air at 2 L/min. The microaeration vessels contained digester sludge to seed sulfur-oxidizing bacteria and facilitate H2S removal. The average H2S removal efficiency using iron filters was 32.91%, with a maximum of 70.21%. The average H2S removal efficiency by iron filters was significantly lower than microaeration after 2 and 4 h retention times (91.5% and 99.8%, respectively). The longer retention time (4 h) resulted in a higher average removal efficiency (99.8%) compared to 2 h (91.5%). The sulfur concentration in the microaeration treatment vessel was 493% higher after 50 days of treatments, indicating that the bacterial community present in the liquid phase of the vessels effectively sequestered the sulfur compounds from the biogas. The H2S removal cost for microaeration (2 h: $29/m3 H2S removed; and 4 h: $27/m3 H2S removed) was an order of magnitude lower than for the iron filter ($382/m3 H2S removed). In the small-scale anaerobic digestion system in Peru, microaeration was more efficient and cost effective for desulfurizing the biogas than the use of iron filters.
Joanna K. Huertas; Lawrence Quipuzco; Amro Hassanein; Stephanie Lansing. Comparing Hydrogen Sulfide Removal Efficiency in a Field-Scale Digester Using Microaeration and Iron Filters. Energies 2020, 13, 4793 .
AMA StyleJoanna K. Huertas, Lawrence Quipuzco, Amro Hassanein, Stephanie Lansing. Comparing Hydrogen Sulfide Removal Efficiency in a Field-Scale Digester Using Microaeration and Iron Filters. Energies. 2020; 13 (18):4793.
Chicago/Turabian StyleJoanna K. Huertas; Lawrence Quipuzco; Amro Hassanein; Stephanie Lansing. 2020. "Comparing Hydrogen Sulfide Removal Efficiency in a Field-Scale Digester Using Microaeration and Iron Filters." Energies 13, no. 18: 4793.
Currently, there are challenges with proper disposal of cassava processing wastewater, and a need for sustainable energy in the cassava industry. This study investigated the impact of co-digestion of cassava wastewater (CW) with livestock manure (poultry litter (PL) and dairy manure (DM)), and porous adsorbents (biochar (B-Char) and zeolite (ZEO)) on energy production and treatment efficiency. Batch anaerobic digestion experiments were conducted, with 16 treatments of CW combined with manure and/or porous adsorbents using triplicate reactors for 48 days. The results showed that CW combined with ZEO (3 g/g total solids (TS)) produced the highest cumulative CH4 (653 mL CH4/g VS), while CW:PL (1:1) produced the most CH4 on a mass basis (17.9 mL CH4/g substrate). The largest reduction in lag phase was observed in the mixture containing CW (1:1), PL (1:1), and B-Char (3 g/g TS), yielding 400 mL CH4/g volatile solids (VS) after 15 days of digestion, which was 84.8% of the total cumulative CH4 from the 48-day trial. Co-digesting CW with ZEO, B-Char, or PL provided the necessary buffer needed for digestion of CW, which improved the process stability and resulted in a significant reduction in chemical oxygen demand (COD). Co-digestion could provide a sustainable strategy for treating and valorizing CW. Scale-up calculations showed that a CW input of 1000–2000 L/d co-digested with PL (1:1) could produce 9403 m3 CH4/yr using a 50 m3 digester, equivalent to 373,327 MJ/yr or 24.9 tons of firewood/year. This system would have a profit of $5642/yr and a $47,805 net present value.
Chibueze Achi; Amro Hassanein; Stephanie Lansing. Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion. Energies 2020, 13, 491 .
AMA StyleChibueze Achi, Amro Hassanein, Stephanie Lansing. Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion. Energies. 2020; 13 (2):491.
Chicago/Turabian StyleChibueze Achi; Amro Hassanein; Stephanie Lansing. 2020. "Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion." Energies 13, no. 2: 491.
The effects of metal nanoparticle (NP) addition during anaerobic digestion (AD) of poultry litter was tested using two sequential experiments: Exp. A) four NPs (Fe, Ni, Co, and Fe3O4) at three concentrations; and Exp. B) NP combinations (Fe, Ni, and Co) at four concentrations. Scanning electronic microscopy (SEM) and elemental analysis were used to confirm NP inclusion after dispersion (before AD) and track nanoparticles post-AD, and new technique for NP extraction post-AD was developed. Before AD, NPs ranged from 30.0 - 80.9 nm for Fe, Ni, and Co, and 94.3 – 400 nm for Fe3O4. Methane production increased with NPs addition compared to poultry litter-only, with the highest increases observed with NPs concentrations (in mg/L) of 12 Ni (38.4% increase), 5.4 Co (29.7% increase), 100 Fe (29.1% increase), and 15 Fe3O4 (27.5% increase). Nanoparticle mixtures greatly decreased H2S production. The SEM post-AD detected Fe, Ni, and Fe3O4 at concentrations ≥ 100mg/L.
Amro Hassanein; Stephanie Lansing; Rohan Tikekar. Impact of metal nanoparticles on biogas production from poultry litter. Bioresource Technology 2018, 275, 200 -206.
AMA StyleAmro Hassanein, Stephanie Lansing, Rohan Tikekar. Impact of metal nanoparticles on biogas production from poultry litter. Bioresource Technology. 2018; 275 ():200-206.
Chicago/Turabian StyleAmro Hassanein; Stephanie Lansing; Rohan Tikekar. 2018. "Impact of metal nanoparticles on biogas production from poultry litter." Bioresource Technology 275, no. : 200-206.
Amro Hassanein; Freddy Witarsa; Xiaohui Guo; Liang Yong; Stephanie Lansing; Ling Qiu. Next generation digestion: Complementing anaerobic digestion (AD) with a novel microbial electrolysis cell (MEC) design. International Journal of Hydrogen Energy 2017, 42, 28681 -28689.
AMA StyleAmro Hassanein, Freddy Witarsa, Xiaohui Guo, Liang Yong, Stephanie Lansing, Ling Qiu. Next generation digestion: Complementing anaerobic digestion (AD) with a novel microbial electrolysis cell (MEC) design. International Journal of Hydrogen Energy. 2017; 42 (48):28681-28689.
Chicago/Turabian StyleAmro Hassanein; Freddy Witarsa; Xiaohui Guo; Liang Yong; Stephanie Lansing; Ling Qiu. 2017. "Next generation digestion: Complementing anaerobic digestion (AD) with a novel microbial electrolysis cell (MEC) design." International Journal of Hydrogen Energy 42, no. 48: 28681-28689.
Amro Hassanein; Ling Qiu; Pan Junting; Ge Yihong; Freddy Witarsa; A.A. Hassanain. Simulation and validation of a model for heating underground biogas digesters by solar energy. Ecological Engineering 2015, 82, 336 -344.
AMA StyleAmro Hassanein, Ling Qiu, Pan Junting, Ge Yihong, Freddy Witarsa, A.A. Hassanain. Simulation and validation of a model for heating underground biogas digesters by solar energy. Ecological Engineering. 2015; 82 ():336-344.
Chicago/Turabian StyleAmro Hassanein; Ling Qiu; Pan Junting; Ge Yihong; Freddy Witarsa; A.A. Hassanain. 2015. "Simulation and validation of a model for heating underground biogas digesters by solar energy." Ecological Engineering 82, no. : 336-344.
This research focus on two PTC designs, one in Runzhen-school, China (latitude 36.5°N, longitude110°E and 386m altitude) and the second PTC with tracking system. The study showed that, using one tube concentrate in the focal point with fixed PTC gives lower efficiency compared with using two vacuum tubes, as the variation of solar altitude angle is large. So using two focal points results a better heating. The new system uses PTC with sun tracking system to maximize solar radiation absorptions, that leading to increase the hot water temperature and has higher system efficiency. In addition, this system supplies two batteries by electricity coming from two solar-cells and it’s produced for the tracking system working during hours of sunlight. The photovoltaic electricity provided is stored in batteries and then used for tracking motion. The tracing motion receives orders from a control unit, which works at different voltage in two solar cells.
Amro Hassanein; Ling Qiu. Design of Parabolic Trough Solar Collector (PTC) and Numerical Simulation for Improving the Efficiency. Applied Mechanics and Materials 2013, 291-294, 53 -60.
AMA StyleAmro Hassanein, Ling Qiu. Design of Parabolic Trough Solar Collector (PTC) and Numerical Simulation for Improving the Efficiency. Applied Mechanics and Materials. 2013; 291-294 ():53-60.
Chicago/Turabian StyleAmro Hassanein; Ling Qiu. 2013. "Design of Parabolic Trough Solar Collector (PTC) and Numerical Simulation for Improving the Efficiency." Applied Mechanics and Materials 291-294, no. : 53-60.
The biogas amounts with stable flowing rate require heating in cold weather. This study focuses on using solar energy for heating biogas digester. In this research we used energy plus building energy simulation software and real weather data for simulation the heating of biogas digester with 8760 hours simulation .The research was carried out in two parts: The first one is one biogas digester above ground without heating. The Second part of this study is a simulation of one biogas digester with solar heating by using a new design based on double plastic cover. It has shown that the use of solar energy can achieve the optimum temperature for biogas production process almost the year time. Using double plastic cover is the most suitable method with economic form for heating biogas digester above ground.
Amro Hassanein; Ling Qiu. Simulation of New Solar Heating System for Heating Biogas Digesters above Ground in Cold Regions. Applied Mechanics and Materials 2013, 291-294, 89 -95.
AMA StyleAmro Hassanein, Ling Qiu. Simulation of New Solar Heating System for Heating Biogas Digesters above Ground in Cold Regions. Applied Mechanics and Materials. 2013; 291-294 ():89-95.
Chicago/Turabian StyleAmro Hassanein; Ling Qiu. 2013. "Simulation of New Solar Heating System for Heating Biogas Digesters above Ground in Cold Regions." Applied Mechanics and Materials 291-294, no. : 89-95.