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The coagulation–flocculation–sedimentation process is widely used for removal of suspended solids and water turbidity reduction. The most common coagulants used to conduct this process are aluminum sulfate and ferric sulfate. In this paper, the use of Aloe vera as a natural-based coagulant for drinking water treatment was tested. The bio-coagulant was used in two different forms: powder as well as liquid; the latter was extracted with distilled water used as a solvent. The obtained results showed that the use of the natural coagulant (Aloe vera) in both powder (AV-Powder) and liquid (AV-H2O) forms reduced the water turbidity at natural pH by 28.23% and 87.84%, respectively. Moreover, it was found that the use of the two previous forms of bio-coagulant for drinking water treatment had no significant influence on the following three parameters: pH, alkalinity, and hardness. The study of the effect of pH on the process performance using Aloe vera as a bio-coagulant demonstrated that the maximum turbidity removal efficiency accounted for 53.53% and 88.23% using AV-Powder and AV-H2O, respectively, at optimal pH 6.
Abderrezzaq Benalia; Kerroum Derbal; Amel Khalfaoui; Raouf Bouchareb; Antonio Panico; Corrado Gisonni; Gaetano Crispino; Francesco Pirozzi; Antonio Pizzi. Use of Aloe vera as an Organic Coagulant for Improving Drinking Water Quality. Water 2021, 13, 2024 .
AMA StyleAbderrezzaq Benalia, Kerroum Derbal, Amel Khalfaoui, Raouf Bouchareb, Antonio Panico, Corrado Gisonni, Gaetano Crispino, Francesco Pirozzi, Antonio Pizzi. Use of Aloe vera as an Organic Coagulant for Improving Drinking Water Quality. Water. 2021; 13 (15):2024.
Chicago/Turabian StyleAbderrezzaq Benalia; Kerroum Derbal; Amel Khalfaoui; Raouf Bouchareb; Antonio Panico; Corrado Gisonni; Gaetano Crispino; Francesco Pirozzi; Antonio Pizzi. 2021. "Use of Aloe vera as an Organic Coagulant for Improving Drinking Water Quality." Water 13, no. 15: 2024.
Cyanobacteria and microalgae are considered as interesting feedstocks for either the production of high value bio-based compounds and biofuels or wastewater treatment. Nevertheless, the high costs of production, mainly due to the harvesting process, hamper a wide commercialization of industrial cyanobacteria and microalgae based products. Recent studies have found in autoflocculation and bioflocculation promising spontaneous processes for a low-cost and environmentally sustainable cyanobacteria and microalgae biomass harvesting process. In the present work, bioflocculation process has been studied for three different inocula: filamentous cyanobacteria, microalgae and their mixture. Their cultivation has been conducted in batch mode using two different cultivation media: synthetic aqueous solution and urban wastewater. The removal of nutrients and flocculation process performance were monitored during the entire cultivation time. Results have proved that bioflocculation and sedimentation processes occur efficiently for filamentous cyanobacteria cultivated in synthetic aqueous solution, whereas such processes are less efficient in urban wastewater due to the specific characteristics of this medium that prevent bioflocculation to occur. Besides different efficiencies associated to cultivation media, this work highlighted that bioflocculation of sole microalgae is not as effective as when they are cultivated together with filamentous cyanobacteria.
Floriana Iasimone; Jordan Seira; Antonio Panico; Vincenzo De Felice; Francesco Pirozzi; Jean-Philippe Steyer. Insights into bioflocculation of filamentous cyanobacteria, microalgae and their mixture for a low-cost biomass harvesting system. Environmental Research 2021, 199, 111359 .
AMA StyleFloriana Iasimone, Jordan Seira, Antonio Panico, Vincenzo De Felice, Francesco Pirozzi, Jean-Philippe Steyer. Insights into bioflocculation of filamentous cyanobacteria, microalgae and their mixture for a low-cost biomass harvesting system. Environmental Research. 2021; 199 ():111359.
Chicago/Turabian StyleFloriana Iasimone; Jordan Seira; Antonio Panico; Vincenzo De Felice; Francesco Pirozzi; Jean-Philippe Steyer. 2021. "Insights into bioflocculation of filamentous cyanobacteria, microalgae and their mixture for a low-cost biomass harvesting system." Environmental Research 199, no. : 111359.
Studies were carried out on anaerobic digestion of tannery wastewater obtained from leather processing. Degassed activated sludge biomass collected from a wastewater treatment plant was used as source of microorganisms. The study was carried out to examine the impact of alkaline pretreatment on a real tannery wastewater prior anaerobic digestion process. Bio-methane potential tests were conducted at 35±2°C on tannery wastewater pretreated by adding different volumes of 2N NaOH solution up to set pH values at 9, 10, 11, and 12, respectively. NaOH solution addition resulted in a partial removal of total Cr showing efficiency from 16.84 to 95.72% as well as in an increase of the soluble chemical oxygen demand concentration from 8.53 to 29.02%. The effects of this pretreatment affected significantly the results obtained with bio-methane potential tests that showed methane production from all the pretreated tannery wastewater samples much higher than from that unpretreated. Finally, the lag phase duration and the maximum specific methane production rate of the anaerobic digestion process were evaluated by fitting the experimental results from bio-methane potential tests with the following three models: (i) the modified Gompertz model, (ii) the Logistic function, and (iii) the Richards model. All the previous models showed a high level of accordance with the experimental data, even though Richards model resulted in being the most accurate.
Achouri Ouafa; Panico Antonio; Bencheikh-Lehocin Mossaab; Derbal Kerroum; Rabahi Amel; Pirozzi Francesco. Alkaline pretreatment of tannery wastewater impact on biochemical methane potential tests: experimental study and kinetic modeling. Biomass Conversion and Biorefinery 2021, 1 -13.
AMA StyleAchouri Ouafa, Panico Antonio, Bencheikh-Lehocin Mossaab, Derbal Kerroum, Rabahi Amel, Pirozzi Francesco. Alkaline pretreatment of tannery wastewater impact on biochemical methane potential tests: experimental study and kinetic modeling. Biomass Conversion and Biorefinery. 2021; ():1-13.
Chicago/Turabian StyleAchouri Ouafa; Panico Antonio; Bencheikh-Lehocin Mossaab; Derbal Kerroum; Rabahi Amel; Pirozzi Francesco. 2021. "Alkaline pretreatment of tannery wastewater impact on biochemical methane potential tests: experimental study and kinetic modeling." Biomass Conversion and Biorefinery , no. : 1-13.
Industrial hemp stands out as a promising candidate for clean and sustainable biomass-to-bioenergy systems due to its multipurpose, high biomass yield and resource efficiency features. In this study, different hemp biomass residues (HBRs) were evaluated as a potential feedstock for renewable biomethane production through anaerobic digestion (AD). The biochemical methane potential (BMP) of the raw and pretreated fibers, stalks, hurds, leaves and inflorescences was investigated by means of batch anaerobic tests. The highest BMP was obtained with the raw fibers (i.e., 422 ± 20 mL CH4·g VS−1), while hemp hurds (unretted), making up more than half of the whole hemp plant dry weight, showed a lower BMP value of 239 ± 10 mL CH4·g VS−1. The alkali pretreatment of unretted hurds and mechanical grinding of retted hurds effectively enhanced the BMP of both substrates by 15.9%. The mix of leaves and inflorescences and inflorescences alone showed low BMP values (i.e., 118 ± 8 and 26 ± 5 mL CH4·g VS−1, respectively) and a prolonged inhibition of methanogenesis. The latter could be overcome through NaOH pretreatment in the mix of leaves and inflorescences (+28.5% methane production).
Silvio Matassa; Giovanni Esposito; Francesco Pirozzi; Stefano Papirio. Exploring the Biomethane Potential of Different Industrial Hemp (Cannabis sativa L.) Biomass Residues. Energies 2020, 13, 3361 .
AMA StyleSilvio Matassa, Giovanni Esposito, Francesco Pirozzi, Stefano Papirio. Exploring the Biomethane Potential of Different Industrial Hemp (Cannabis sativa L.) Biomass Residues. Energies. 2020; 13 (13):3361.
Chicago/Turabian StyleSilvio Matassa; Giovanni Esposito; Francesco Pirozzi; Stefano Papirio. 2020. "Exploring the Biomethane Potential of Different Industrial Hemp (Cannabis sativa L.) Biomass Residues." Energies 13, no. 13: 3361.
Cheese whey (CW) and hemp hurds (HH) represent typically overabundant biowastes of food and agricultural production, and their circular management is crucial to improve both sustainability and profitability of the agri-food chain. By combining experimental biochemical methane potential (BMP) tests and literature data, the techno-economic aspects of a possible future bioenergy valorization of CW and HH through anaerobic digestion (AD) and co- digestion (coAD) were analyzed. Along the 42-days, BMP assays, CW, and HH alone rendered BMP values of 446 ± 66 and 242 ± 13 mL CH4·g VS−1, respectively. The application of coAD with CW and HH at a 70:30 ratio allowed to enhance the biomethane production by 10.7%, as compared to the corresponding calculated value. In terms of economic profitability, the valorization of HH as biomethane in a dual-purpose hemp cultivation could potentially enable net profits of up to 3929 €·ha−1, which could rise to 6124 €·ha−1 in case of coAD with CW. Finally, by projecting the biomethane potential from current and future available CW and HH residues in the national context of Italy, a total biomethane yield of up to 296 MNm3·y−1 could be attained, offering interesting perspectives for the sustainability of key sectors such as transportation.
Stefano Papirio; Silvio Matassa; Francesco Pirozzi; Giovanni Esposito. Anaerobic Co-Digestion of Cheese Whey and Industrial Hemp Residues Opens New Perspectives for the Valorization of Agri-Food Waste. Energies 2020, 13, 2820 .
AMA StyleStefano Papirio, Silvio Matassa, Francesco Pirozzi, Giovanni Esposito. Anaerobic Co-Digestion of Cheese Whey and Industrial Hemp Residues Opens New Perspectives for the Valorization of Agri-Food Waste. Energies. 2020; 13 (11):2820.
Chicago/Turabian StyleStefano Papirio; Silvio Matassa; Francesco Pirozzi; Giovanni Esposito. 2020. "Anaerobic Co-Digestion of Cheese Whey and Industrial Hemp Residues Opens New Perspectives for the Valorization of Agri-Food Waste." Energies 13, no. 11: 2820.
The paper investigates mixed-culture lactate (LA) fermentation of cheese whey (CW) in order to verify the possibility of using waste materials as feedstock to produce a product with high economic potential. The fermentation performance of two reactors operating in repeated-batch mode under uncontrolled pH conditions and various hydraulic retention time and feeding conditions was evaluated in terms of LA production. Five experimental phases were conducted. The hydraulic retention time (HRT) was varied from 1 to 4 days to verify its effect on the process performance. The best results, corresponding to the maximum LA concentration (20.1 g LA/L) and the maximum LA yield (0.37 g chemical oxygen demand (COD)(LA)/g COD(CW)), were reached by feeding the reactors with cheese whey alone and setting the HRT to 2 days. The maximum productivity of lactic acid (10.6 g LA/L/day) was observed when the HRT was decreased to 1 day.
Vincenzo Luongo; Grazia Policastro; Anish Ghimire; Francesco Pirozzi; Massimiliano Fabbricino. Repeated-Batch Fermentation of Cheese Whey for Semi-Continuous Lactic Acid Production Using Mixed Cultures at Uncontrolled pH. Sustainability 2019, 11, 3330 .
AMA StyleVincenzo Luongo, Grazia Policastro, Anish Ghimire, Francesco Pirozzi, Massimiliano Fabbricino. Repeated-Batch Fermentation of Cheese Whey for Semi-Continuous Lactic Acid Production Using Mixed Cultures at Uncontrolled pH. Sustainability. 2019; 11 (12):3330.
Chicago/Turabian StyleVincenzo Luongo; Grazia Policastro; Anish Ghimire; Francesco Pirozzi; Massimiliano Fabbricino. 2019. "Repeated-Batch Fermentation of Cheese Whey for Semi-Continuous Lactic Acid Production Using Mixed Cultures at Uncontrolled pH." Sustainability 11, no. 12: 3330.
In this study, the use of acorn leaves as a natural coagulant to reduce raw water turbidity and globally improve drinking water quality was investigated. The raw water was collected from a drinking water treatment plant located in Mila (Algeria) with an initial turbidity of 13.0 ± 0.1 NTU. To obtain acorn leaf powder as a coagulant, the acorn leaves were previously cleaned, washed with tap water, dried, ground and then finely sieved. To improve the coagulant activity and, consequently, the turbidity removal efficiency, the fine powder was also preliminarily treated with different solvents, as follows, in order to extract the coagulant agent: (i) distilled water; (ii) solutions of NaCl (0.25; 0.5 and 1 M); (iii) solutions of NaOH (0.025; 0.05 and 0.1 M); and (iv) solutions of HCl (0.025; 0.05 and 0.1 M). Standard Jar Test assays were conducted to evaluate the performance of the coagulant in the different considered operational conditions. Results of the study indicated that at low turbidity (e.g., 13.0 ± 0.1 NTU), the raw acorn leaf powder and those treated with distilled water (DW) were able to decrease the turbidity to 3.69 ± 0.06 and 1.97 ± 0.03 NTU, respectively. The use of sodium chloride solution (AC-NaCl) at 0.5 M resulted in a high turbidity removal efficiency (91.07%) compared to solutions with different concentrations (0.25 and 1 M). Concerning solutions of sodium hydroxide (AC-NaOH) and hydrogen chloride (AC-HCl), the lowest final turbidities of 1.83 ± 0.13 and 0.92 ± 0.02 NTU were obtained when the concentrations of the solutions were set at 0.05 and 0.1 M, respectively. Finally, in this study, other water quality parameters, such as total alkalinity hardness, pH, electrical conductivity and organic matters content, were measured to assess the coagulant performance on drinking water treatment.
Abderrezzaq Benalia; Kerroum Derbal; Antonio Panico; Francesco Pirozzi. Use of Acorn Leaves as a Natural Coagulant in a Drinking Water Treatment Plant. Water 2018, 11, 57 .
AMA StyleAbderrezzaq Benalia, Kerroum Derbal, Antonio Panico, Francesco Pirozzi. Use of Acorn Leaves as a Natural Coagulant in a Drinking Water Treatment Plant. Water. 2018; 11 (1):57.
Chicago/Turabian StyleAbderrezzaq Benalia; Kerroum Derbal; Antonio Panico; Francesco Pirozzi. 2018. "Use of Acorn Leaves as a Natural Coagulant in a Drinking Water Treatment Plant." Water 11, no. 1: 57.
Vincenzo Luongo; Angelo Palma; Eldon R. Rene; Angelo Fontana; Francesco Pirozzi; Giovanni Esposito; Piet Nicolaas Luc Lens. Lactic acid recovery from a model of Thermotoga neapolitana fermentation broth using ion exchange resins in batch and fixed-bed reactors. Separation Science and Technology 2018, 54, 1008 -1025.
AMA StyleVincenzo Luongo, Angelo Palma, Eldon R. Rene, Angelo Fontana, Francesco Pirozzi, Giovanni Esposito, Piet Nicolaas Luc Lens. Lactic acid recovery from a model of Thermotoga neapolitana fermentation broth using ion exchange resins in batch and fixed-bed reactors. Separation Science and Technology. 2018; 54 (6):1008-1025.
Chicago/Turabian StyleVincenzo Luongo; Angelo Palma; Eldon R. Rene; Angelo Fontana; Francesco Pirozzi; Giovanni Esposito; Piet Nicolaas Luc Lens. 2018. "Lactic acid recovery from a model of Thermotoga neapolitana fermentation broth using ion exchange resins in batch and fixed-bed reactors." Separation Science and Technology 54, no. 6: 1008-1025.
Dairy wastes can be conveniently processed and valorized in a biorefinery value chain since they are abundant, zero-cost and all year round available. For a comprehensive knowledge of the microbial species involved in producing biofuels and valuable intermediates from dairy wastes, the changes in bacterial and archaeal population were evaluated when H, CH and chemical intermediates were produced. Batch anaerobic tests were conducted with a mixture of mozzarella cheese whey and buttermilk as organic substrate, inoculated with 1% and 3% w/v industrial animal manure pellets. The archaeal methanogens concentration increased in the test inoculated at 3% (w/v) when H and CH production occurred, being 1 log higher than that achieved in the test inoculated at 1% (w/v). Many archaeal species, mostly involved in the production of CH, were identified by sequencing denaturing gradient gel electrophoresis (DGGE) bands. Methanoculleus, Methanocorpusculum and Methanobrevibacter genera were dominant archaea involved in the anaerobic process for bioenergy production from mozzarella cheese whey and buttermilk mixture.
Giorgia Pagliano; Valeria Ventorino; Antonio Panico; Ida Romano; Alessandro Robertiello; Francesco Pirozzi; Olimpia Pepe. The effect of bacterial and archaeal populations on anaerobic process fed with mozzarella cheese whey and buttermilk. Journal of Environmental Management 2018, 217, 110 -122.
AMA StyleGiorgia Pagliano, Valeria Ventorino, Antonio Panico, Ida Romano, Alessandro Robertiello, Francesco Pirozzi, Olimpia Pepe. The effect of bacterial and archaeal populations on anaerobic process fed with mozzarella cheese whey and buttermilk. Journal of Environmental Management. 2018; 217 ():110-122.
Chicago/Turabian StyleGiorgia Pagliano; Valeria Ventorino; Antonio Panico; Ida Romano; Alessandro Robertiello; Francesco Pirozzi; Olimpia Pepe. 2018. "The effect of bacterial and archaeal populations on anaerobic process fed with mozzarella cheese whey and buttermilk." Journal of Environmental Management 217, no. : 110-122.
This paper presents the results of an experimental study aimed at investigating the effect of operative parameters on the efficiency of a soil flushing process, conducted on real contaminated soil containing high amounts of Cu and Zn. Soil flushing tests were carried out with Ethylenediamine-N,N′-disuccinic acid (EDDS) as a flushing agent due to its high biodegradability and environmentally friendly characteristics. Process parameters such as Empty-Bed Contact Time (EBCT) and EDDS solution molarity were varied from 21–33 h and from 0.36–3.6 mM, respectively. Effects on the mobility of cations such as Fe and Mn were also investigated. Results showed that very high performances can be obtained at [EDDS] = 3.6 mM and EBCT = 33 h. In these conditions, in fact, the amount of removed Cu was 53%, and the amount of removed Zn was 46%. Metal distribution at different depths from the top surface revealed that Cu has higher mobility than Zn. The process results were strongly dependent on the exchange of metals due to the different stability constants of the EDDS complexes. Finally, results from a comparative study showed that soil washing treatment reached the same removal efficiency of the flushing process in a shorter time but required a larger amount of the EDDS solution.
Marco Race; Alberto Ferraro; Massimiliano Fabbricino; Agostino La Marca; Antonio Panico; Danilo Spasiano; Alice Tognacchini; Francesco Pirozzi. Ethylenediamine-N,N′-Disuccinic Acid (EDDS)—Enhanced Flushing Optimization for Contaminated Agricultural Soil Remediation and Assessment of Prospective Cu and Zn Transport. International Journal of Environmental Research and Public Health 2018, 15, 543 .
AMA StyleMarco Race, Alberto Ferraro, Massimiliano Fabbricino, Agostino La Marca, Antonio Panico, Danilo Spasiano, Alice Tognacchini, Francesco Pirozzi. Ethylenediamine-N,N′-Disuccinic Acid (EDDS)—Enhanced Flushing Optimization for Contaminated Agricultural Soil Remediation and Assessment of Prospective Cu and Zn Transport. International Journal of Environmental Research and Public Health. 2018; 15 (3):543.
Chicago/Turabian StyleMarco Race; Alberto Ferraro; Massimiliano Fabbricino; Agostino La Marca; Antonio Panico; Danilo Spasiano; Alice Tognacchini; Francesco Pirozzi. 2018. "Ethylenediamine-N,N′-Disuccinic Acid (EDDS)—Enhanced Flushing Optimization for Contaminated Agricultural Soil Remediation and Assessment of Prospective Cu and Zn Transport." International Journal of Environmental Research and Public Health 15, no. 3: 543.
Production of biohydrogen and related metabolic by-products was investigated in Solid State Dark Fermentation (SSDF) of food waste (FW) and wheat straw (WS). The effect of the total solids (TS) content and H2 partial pressure (ppH2), two of the main operating factors of SSDF, were investigated. Batch tests with FW at 10, 15, 20, 25 and 30% TS showed considerable effects of the TS on metabolites distribution. H2 production was strongly inhibited for TS contents higher than 15% with a concomitant accumulation of lactic acid and a decrease in substrate conversion. Varying the ppH2 had no significant effect on the conversion products and overall degradation of FW and WS, suggesting that ppH2 was not the main limiting factor in SSDF. This study showed that the conversion of complex substrates by SSDF depends on the substrate type and is limited by the TS content.
Anish Ghimire; Eric Trably; Luigi Frunzo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito; Elisabeth Cazier; Renaud Escudié. Effect of total solids content on biohydrogen production and lactic acid accumulation during dark fermentation of organic waste biomass. Bioresource Technology 2018, 248, 180 -186.
AMA StyleAnish Ghimire, Eric Trably, Luigi Frunzo, Francesco Pirozzi, Piet Nicolaas Luc Lens, Giovanni Esposito, Elisabeth Cazier, Renaud Escudié. Effect of total solids content on biohydrogen production and lactic acid accumulation during dark fermentation of organic waste biomass. Bioresource Technology. 2018; 248 ():180-186.
Chicago/Turabian StyleAnish Ghimire; Eric Trably; Luigi Frunzo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito; Elisabeth Cazier; Renaud Escudié. 2018. "Effect of total solids content on biohydrogen production and lactic acid accumulation during dark fermentation of organic waste biomass." Bioresource Technology 248, no. : 180-186.
The dewaterability of sludge from two conventional activated sludge (CAS) and three membrane bioreactor (MBR)–based wastewater treatment plants is investigated prior to and after anaerobic digestion. The concentration and composition of extracellular polymeric substances (EPS) mostly affect the dewaterability of all raw sludge samples. Better sludge dewaterability is observed when the concentration of proteins, carbohydrates, uronic acids, and humic acids is below approximately 400, 250, 200, and 40 mg/L, respectively. In contrast, the specific resistance to filtration (SRF) increases in the sludge samples with a higher EPS concentration. The MBR results in a lower EPS production and a uronic acid–dominating EPS composition. This especially affects the dewaterability of one MBR sludge, also characterized by high salinity and a smaller particle size. Anaerobic digestion results in a higher SRF for both CAS and MBR sludge, with the particle-size distribution having the preponderant effect on the digested sludge dewaterability.
Ludovico Pontoni; Stefano Papirio; Giorgio D’Alessandro; Donatella Caniani; Riccardo Gori; Giorgio Mannina; Marco Capodici; Salvatore Nicosia; Massimiliano Fabbricino; Francesco Pirozzi; Giovanni Esposito. Dewaterability of CAS and MBR Sludge: Effect of Biological Stability and EPS Composition. Journal of Environmental Engineering 2018, 144, 04017088 .
AMA StyleLudovico Pontoni, Stefano Papirio, Giorgio D’Alessandro, Donatella Caniani, Riccardo Gori, Giorgio Mannina, Marco Capodici, Salvatore Nicosia, Massimiliano Fabbricino, Francesco Pirozzi, Giovanni Esposito. Dewaterability of CAS and MBR Sludge: Effect of Biological Stability and EPS Composition. Journal of Environmental Engineering. 2018; 144 (1):04017088.
Chicago/Turabian StyleLudovico Pontoni; Stefano Papirio; Giorgio D’Alessandro; Donatella Caniani; Riccardo Gori; Giorgio Mannina; Marco Capodici; Salvatore Nicosia; Massimiliano Fabbricino; Francesco Pirozzi; Giovanni Esposito. 2018. "Dewaterability of CAS and MBR Sludge: Effect of Biological Stability and EPS Composition." Journal of Environmental Engineering 144, no. 1: 04017088.
A novel modification of the sample preparation procedure for the Folin–Ciocalteu colorimetric assay for the determination of total phenolic compounds in natural solid and semisolid organic materials (e.g., foods, organic solid waste, soils, plant tissues, agricultural residues, manure) is proposed. In this method, the sample is prepared by adding sodium sulfate as a solid diluting agent before homogenization. The method allows for the determination of total phenols (TP) in samples with high solids contents, and it provides good accuracy and reproducibility. Additionally, this method permits analyses of significant amounts of sample, which reduces problems related to heterogeneity. We applied this method to phenols-rich lignocellulosic and humic-like solids and semisolid samples, including rice straw (RS), peat-rich soil (PS), and food waste (FW). The TP concentrations measured with the solid dilution (SD) preparation were substantially higher (increases of 41.4%, 15.5%, and 59.4% in RS, PS and FW, respectively) than those obtained with the traditional method (solids suspended in water). These results showed that the traditional method underestimates the phenolic contents in the studied solids.
Ludovico Pontoni; Antonio Panico; Alessia Matanò; Eric D. van Hullebusch; Massimiliano Fabbricino; Giovanni Esposito; Francesco Pirozzi. Modified Sample Preparation Approach for the Determination of the Phenolic and Humic-Like Substances in Natural Organic Materials By the Folin Ciocalteu Method. Journal of Agricultural and Food Chemistry 2017, 65, 10666 -10672.
AMA StyleLudovico Pontoni, Antonio Panico, Alessia Matanò, Eric D. van Hullebusch, Massimiliano Fabbricino, Giovanni Esposito, Francesco Pirozzi. Modified Sample Preparation Approach for the Determination of the Phenolic and Humic-Like Substances in Natural Organic Materials By the Folin Ciocalteu Method. Journal of Agricultural and Food Chemistry. 2017; 65 (48):10666-10672.
Chicago/Turabian StyleLudovico Pontoni; Antonio Panico; Alessia Matanò; Eric D. van Hullebusch; Massimiliano Fabbricino; Giovanni Esposito; Francesco Pirozzi. 2017. "Modified Sample Preparation Approach for the Determination of the Phenolic and Humic-Like Substances in Natural Organic Materials By the Folin Ciocalteu Method." Journal of Agricultural and Food Chemistry 65, no. 48: 10666-10672.
Zhiji Ding; Isabelle Bourven; Eric D. van Hullebusch; Antonio Panico; Francesco Pirozzi; Giovanni Esposito; Gilles Guibaud. Quantitative and qualitative characterization of extracellular polymeric substances from Anammox enrichment. Journal of the Taiwan Institute of Chemical Engineers 2017, 80, 738 -746.
AMA StyleZhiji Ding, Isabelle Bourven, Eric D. van Hullebusch, Antonio Panico, Francesco Pirozzi, Giovanni Esposito, Gilles Guibaud. Quantitative and qualitative characterization of extracellular polymeric substances from Anammox enrichment. Journal of the Taiwan Institute of Chemical Engineers. 2017; 80 ():738-746.
Chicago/Turabian StyleZhiji Ding; Isabelle Bourven; Eric D. van Hullebusch; Antonio Panico; Francesco Pirozzi; Giovanni Esposito; Gilles Guibaud. 2017. "Quantitative and qualitative characterization of extracellular polymeric substances from Anammox enrichment." Journal of the Taiwan Institute of Chemical Engineers 80, no. : 738-746.
The aim of this work is to investigate the hydrogen and poly-β-hydroxybutyrate (PHB) production during the photofermentative treatment of the effluent from a dark fermentation reactor fed with the organic fraction of municipal solid waste. Two different inocula, an adapted culture of Rhodobacter sphaeroides AV1b and a mixed consortium of purple non sulphur bacteria have been investigated under the same operational conditions. Different hydrogen productivities of 364 and 559NmL H L were observed for the Rhodobacter sphaeroides and the mixed culture consortium tests, respectively: the consortium of PNSB resulted 1.5-fold more productive than the pure culture. On the other hand, Rhodobacter sphaeroides culture showed a higher PHB productivity (155mg PHB g COD) than the mixed culture (55mg PHB g COD). In all the tests, the concomitant H and PHB production was associated to a dissolved COD removal higher than 80%.
Vincenzo Luongo; Anish Ghimire; Luigi Frunzo; Massimiliano Fabbricino; Giuseppe D'Antonio; Francesco Pirozzi; Giovanni Esposito. Photofermentative production of hydrogen and poly-β-hydroxybutyrate from dark fermentation products. Bioresource Technology 2017, 228, 171 -175.
AMA StyleVincenzo Luongo, Anish Ghimire, Luigi Frunzo, Massimiliano Fabbricino, Giuseppe D'Antonio, Francesco Pirozzi, Giovanni Esposito. Photofermentative production of hydrogen and poly-β-hydroxybutyrate from dark fermentation products. Bioresource Technology. 2017; 228 ():171-175.
Chicago/Turabian StyleVincenzo Luongo; Anish Ghimire; Luigi Frunzo; Massimiliano Fabbricino; Giuseppe D'Antonio; Francesco Pirozzi; Giovanni Esposito. 2017. "Photofermentative production of hydrogen and poly-β-hydroxybutyrate from dark fermentation products." Bioresource Technology 228, no. : 171-175.
Biohydrogen (H2) production from dark fermentation processes is inhibited at low culture pH (<4.0). This work investigated the culture pH and H2 production stability during the dark fermentation of cheese whey, supplemented with buffalo manure. The co-fermentation of cheese whey, rich in high carbohydrate but yielding acidic pH, with buffalo manure characterized by a high alkalinity, is promising for continuous H2 production in dark fermentation. At a cheese whey to buffalo manure ratio of 4 g VS/g VS, a maximum H2 yield and production rate of respectively, 152.2 (±43.9) mL H2/g VS and 215.4 (±62.1) mL H2/L/d, were achieved at an organic loading rate of 2.1 g VS/L/d of cheese whey at a stable culture pH of 4.8–5.0. The use of buffalo manure improved the H2 production stability and could replace chemical buffering agents of scaled-up dark fermentation application
Anish Ghimire; Vincenzo Luongo; Luigi Frunzo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito. Continuous biohydrogen production by thermophilic dark fermentation of cheese whey: Use of buffalo manure as buffering agent. International Journal of Hydrogen Energy 2017, 42, 4861 -4869.
AMA StyleAnish Ghimire, Vincenzo Luongo, Luigi Frunzo, Francesco Pirozzi, Piet Nicolaas Luc Lens, Giovanni Esposito. Continuous biohydrogen production by thermophilic dark fermentation of cheese whey: Use of buffalo manure as buffering agent. International Journal of Hydrogen Energy. 2017; 42 (8):4861-4869.
Chicago/Turabian StyleAnish Ghimire; Vincenzo Luongo; Luigi Frunzo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito. 2017. "Continuous biohydrogen production by thermophilic dark fermentation of cheese whey: Use of buffalo manure as buffering agent." International Journal of Hydrogen Energy 42, no. 8: 4861-4869.
The mobility of selected heavy metals in trace concentrations was investigated in a standard OECD soil irrigated with the effluent of a real municipal wastewater treatment plant. While Cd, Cu and Ni accumulation-migration patterns were mainly influenced by the mobility of colloids generated from soil organic and inorganic matter, Zn mobility was more influenced by the wastewater content of dissolved organic matter and by its salinity. Metal accumulation caused by interaction with colloids resulted in contamination peaks both in different zones of the soil column and in the leaching solution. The release of metals in the leachate was correlated to the contemporary release of silicates from kaolinite and dissolved organic matter, identified through UV absorbance and chemical oxygen demand monitoring. The hypothesized colloidal mobilization was confirmed by spectroscopic studies. The highly heterogeneous complexes of organic and inorganic molecules responsible for metal transport through soil appeared to be structured in highly stable micellar aggregates.
Ludovico Pontoni; Eric D. Van Hullebusch; Yoan Pechaud; Massimiliano Fabbricino; Giovanni Esposito; Francesco Pirozzi. Colloidal Mobilization and Fate of Trace Heavy Metals in Semi-Saturated Artificial Soil (OECD) Irrigated with Treated Wastewater. Sustainability 2016, 8, 1257 .
AMA StyleLudovico Pontoni, Eric D. Van Hullebusch, Yoan Pechaud, Massimiliano Fabbricino, Giovanni Esposito, Francesco Pirozzi. Colloidal Mobilization and Fate of Trace Heavy Metals in Semi-Saturated Artificial Soil (OECD) Irrigated with Treated Wastewater. Sustainability. 2016; 8 (12):1257.
Chicago/Turabian StyleLudovico Pontoni; Eric D. Van Hullebusch; Yoan Pechaud; Massimiliano Fabbricino; Giovanni Esposito; Francesco Pirozzi. 2016. "Colloidal Mobilization and Fate of Trace Heavy Metals in Semi-Saturated Artificial Soil (OECD) Irrigated with Treated Wastewater." Sustainability 8, no. 12: 1257.
The present work studied the start-up process of a mesophilic (37 ± 2 °C) anaerobic fluidized bed reactor (AFBR) operated at a hydraulic retention time (HRT) of 20 days using synthetic carbohydrate rich wastewater. Anox Kaldness-K1 carriers were used as biofilm carrier material. The reactor performance and biofilm formation were evaluated during the process. The start-up process at lower liquid recirculation flow rate enhanced the biofilm formation and reactor performance. The organic substrate composition had a major impact on early colonization of methanogenic archaea onto the surface of the Kaldness carriers during the start-up process. Specific organic substrates favouring the growth of methanogenic archaea, such as acetate, are preferred in order to facilitate the subsequent biofilm formation and AFBR start-up. The supply of 'bio-available' nutrients and trace elements, in particular iron, had an important role on optimal methanogenic activity and speeding-up of the biofilm development on the Kaldness carriers. This paper provides possible strategies to optimize the various operational parameters that influence the initial biofilm formation and development in an AFBR and similar high rate anaerobic reactors, hence can be used to reduce the long time required for process start-up.
Martha M. Yeshanew; Luigi Frunzo; Vincenzo Luongo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito. Start-up of an anaerobic fluidized bed reactor treating synthetic carbohydrate rich wastewater. Journal of Environmental Management 2016, 184, 456 -464.
AMA StyleMartha M. Yeshanew, Luigi Frunzo, Vincenzo Luongo, Francesco Pirozzi, Piet Nicolaas Luc Lens, Giovanni Esposito. Start-up of an anaerobic fluidized bed reactor treating synthetic carbohydrate rich wastewater. Journal of Environmental Management. 2016; 184 ():456-464.
Chicago/Turabian StyleMartha M. Yeshanew; Luigi Frunzo; Vincenzo Luongo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito. 2016. "Start-up of an anaerobic fluidized bed reactor treating synthetic carbohydrate rich wastewater." Journal of Environmental Management 184, no. : 456-464.
A micro-contamination phenomenon was reproduced and studied at lab-scale, mimicking the irrigation of a standard artificial soil with a water solution containing three Heavy Metals (HMs) at trace concentration level. To assess the dynamics of micro-pollutants accumulation and migration trough the soil, the organic matter in the soil was varied, together with sodicity of the irrigation water. Accumulation of the investigated contaminants was observed mainly in the top layer (≤1 cm) of the irrigated soil. This was attributed to the high interaction capacity of the soil compared to the low HM concentrations in the water phase. HMs transport pattern was described assuming a multi-component mechanism including: i) the interaction of HMs with the colloidal phase of the soil; ii) the slow and constant release of small molecular weight ligands detaching from the soil immobile matrix; iii) the transportation of HMs through the soil by these low molecular weight chaperon molecules. The mobility was directly related to the soil organic matter (SOM), since higher amount of SOM correspond to a higher number of chaperon molecules. In the first centimetre of the soil the metals were mostly bound to the acid labile fraction. Very low mobilization was observed with increasing sodicity in the leaching water, since such conditions were unfavourable to the colloidal mobilization of SOM. This indicated that water/soil transfer of pollutant is not only related to the contaminant concentration in the irrigation water but also to the characteristics of the aqueous solution and to the physical-chemical properties of the soil.
Ludovico Pontoni; Eric D. van Hullebusch; Massimiliano Fabbricino; Giovanni Esposito; Francesco Pirozzi. Assessment of trace heavy metals dynamics during the interaction of aqueous solutions with the artificial OECD soil: Evaluation of the effect of soil organic matter content and colloidal mobilization. Chemosphere 2016, 163, 382 -391.
AMA StyleLudovico Pontoni, Eric D. van Hullebusch, Massimiliano Fabbricino, Giovanni Esposito, Francesco Pirozzi. Assessment of trace heavy metals dynamics during the interaction of aqueous solutions with the artificial OECD soil: Evaluation of the effect of soil organic matter content and colloidal mobilization. Chemosphere. 2016; 163 ():382-391.
Chicago/Turabian StyleLudovico Pontoni; Eric D. van Hullebusch; Massimiliano Fabbricino; Giovanni Esposito; Francesco Pirozzi. 2016. "Assessment of trace heavy metals dynamics during the interaction of aqueous solutions with the artificial OECD soil: Evaluation of the effect of soil organic matter content and colloidal mobilization." Chemosphere 163, no. : 382-391.
This work aimed at investigating concomitant production of biohydrogen and poly-β-hydroxybutyrate (PHB) by photofermentation (PF) using dark fermentation effluents (DFE). An adapted culture of Rhodobacter sphaeroides AV1b (pH 6.5, 24 ± 2 °C) achieved H2 and PHB yields of 256 (± 2) N mL H2/g Chemical Oxygen Demand (COD) and 273.8 mg PHB/g COD (32.5 ± 3% of the dry cells weight (DCW)), respectively. When a diluted (1:2) DFE medium was applied to the adapted pure and mixed photofermentative culture, the respective H2 yields were 164.0 (± 12) and 71.3 (± 6) NmL H2/g COD and the PHB yields were 212.1 (± 105.2) and 50.7 (± 2.7) mg PHB/g COD added, corresponding to 24 (± 0.7) and 6.3 (± 0)% DCW, respectively. The concomitant H2 and PHB production from the PF process gave a good DFE post treatment achieving up to 80% COD removal from the initial DFE.
Anish Ghimire; Serena Valentino; Luigi Frunzo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito. Concomitant biohydrogen and poly-β-hydroxybutyrate production from dark fermentation effluents by adapted Rhodobacter sphaeroides and mixed photofermentative cultures. Bioresource Technology 2016, 217, 157 -164.
AMA StyleAnish Ghimire, Serena Valentino, Luigi Frunzo, Francesco Pirozzi, Piet Nicolaas Luc Lens, Giovanni Esposito. Concomitant biohydrogen and poly-β-hydroxybutyrate production from dark fermentation effluents by adapted Rhodobacter sphaeroides and mixed photofermentative cultures. Bioresource Technology. 2016; 217 ():157-164.
Chicago/Turabian StyleAnish Ghimire; Serena Valentino; Luigi Frunzo; Francesco Pirozzi; Piet Nicolaas Luc Lens; Giovanni Esposito. 2016. "Concomitant biohydrogen and poly-β-hydroxybutyrate production from dark fermentation effluents by adapted Rhodobacter sphaeroides and mixed photofermentative cultures." Bioresource Technology 217, no. : 157-164.