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Kazimierowicz J, Dębowski M, Zieliński M. Technological, Ecological, and Energy-Economic Aspects of Using Solidified Carbon Dioxide for Aerobic Granular Sludge Pre-Treatment Prior to Anaerobic Digestion. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4234. [PMID: 36901245 PMCID: PMC10002249 DOI: 10.3390/ijerph20054234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/24/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
The technology of aerobic granular sludge (AGS) seems prospective in wastewater bio-treatment. The characteristics as well as compactness and structure of AGS have been proved to significantly affect the effectiveness of thus far deployed methods for sewage sludge processing, including anaerobic digestion (AD). Therefore, it is deemed necessary to extend knowledge on the possibilities of efficient AGS management and to seek viable technological solutions for methane fermentation of sludge of this type, including by means of using the pre-treatment step. Little is known about the pre-treatment method with solidified carbon dioxide (SCO2), which can be recovered in processes of biogas upgrading and enrichment, leading to biomethane production. This study aimed to determine the impact of AGS pre-treatment with SCO2 on the efficiency of its AD. An energy balance and a simplified economic analysis of the process were also carried out. It was found that an increasing dose of SCO2 applied in the pre-treatment increased the concentrations of COD, N-NH4+, and P-PO43- in the supernatant in the range of the SCO2/AGS volume ratios from 0.0 to 0.3. No statistically significant differences were noted above the latter value. The highest unit yields of biogas and methane production, reaching 476 ± 20 cm3/gVS and 341 ± 13 cm3/gVS, respectively, were obtained in the variant with the SCO2/AGS ratio of 0.3. This experimental variant also produced the highest positive net energy gain, reaching 1047.85 ± 20 kWh/ton total solids (TS). The use of the higher than 0.3 SCO2 doses was proved to significantly reduce the pH of AGS (below 6.5), thereby directly diminishing the percentage of methanogenic bacteria in the anaerobic bacterial community, which in turn contributed to a reduced CH4 fraction in the biogas.
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Affiliation(s)
- Joanna Kazimierowicz
- Department of Water Supply and Sewage Systems, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, 15-351 Bialystok, Poland
| | - Marcin Dębowski
- Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-720 Olsztyn, Poland
| | - Marcin Zieliński
- Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-720 Olsztyn, Poland
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Biohythane Production in Hydrogen-Oriented Dark Fermentation of Aerobic Granular Sludge (AGS) Pretreated with Solidified Carbon Dioxide (SCO 2). Int J Mol Sci 2023; 24:ijms24054442. [PMID: 36901872 PMCID: PMC10003144 DOI: 10.3390/ijms24054442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 03/05/2023] Open
Abstract
Though deemed a prospective method, the bioconversion of organic waste to biohydrogen via dark fermentation (DF) has multiple drawbacks and limitations. Technological difficulties of hydrogen fermentation may, in part, be eliminated by making DF a viable method for biohythane production. Aerobic granular sludge (AGS) is a little-known organic waste spurring a growing interest in the municipal sector; its characteristics indicate the feasibility of its use as a substrate for biohydrogen production. The major goal of the present study was to determine the effect of AGS pretreatment with solidified carbon dioxide (SCO2) on the yield of H2 (biohythane) production during anaerobic digestion (AD). It was found that an increasing dose of SCO2 caused an increase in concentrations of COD, N-NH4+, and P-PO43- in the supernatant at the SCO2/AGS volume ratios from 0 to 0.3. The AGS pretreatment at SCO2/AGS ratios within the range of 0.1-0.3 was shown to enable the production of biogas with over 8% H2 (biohythane) content. The highest yield of biohythane production, reaching 481 ± 23 cm3/gVS, was obtained at the SCO2/AGS ratio of 0.3. This variant produced 79.0 ± 6% CH4 and 8.9 ± 2% H2. The higher SCO2 doses applied caused a significant decrease in the pH value of AGS, modifying the anaerobic bacterial community to the extent that diminished anaerobic digestion performance.
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Krause MJ, Detwiler N, Schwarber A, McCauley M. An evaluation of solar thermal heating to support a freeze-thaw anaerobic digestion system for human waste treatment in subarctic environments. RENEWABLE ENERGY 2022; 198:618-625. [PMID: 36760369 PMCID: PMC9907457 DOI: 10.1016/j.renene.2022.08.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Remote locations, small communities, and weather prohibit the operation of piped sanitary sewers in many Alaska Native Villages (ANVs). Research was conducted to understand the technical feasibility of installing anaerobic digesters (ADs) in remote ANVs which would be heated by solar thermal collectors. Biochemical methane potential (BMP) assays were conducted to understand the effect of freezing and thawing on methanogenic activity of synthetic human feces. BMPs were frozen at -20 or -80 °C for 7 days and then incubated at psychrophilic (20 °C) or mesophilic (37 °C) conditions. Psychrophilic BMPs frozen at -20 or -80 °C yielded 453 ± 119 and 662 ± 77 mL CH4/g VS, respectively. Mesophilic BMPs frozen at -20 or -80 °C yielded 337 ± 59 and 495 ± 63 mL CH4/g VS, respectively. Freezing caused a lag period, but ultimately many of the assays reached yields similar to or even greater than the baseline, unfrozen assays. Monthly solar radiation and air temperature data were used to identify the number of solar thermal collectors that would be required to supplement heat energy to operate the ADs in several locations. Alaskan subarctic locations receive enough solar thermal energy in summer months to support seasonally operated, psychrophilic ADs.
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Affiliation(s)
- Max J. Krause
- US Environmental Protection Agency, Office of Research & Development, 26 Martin Luther King Dr W, Cincinnati, OH, 45268, USA
| | - Natalie Detwiler
- Oak Ridge Associated Universities, 26 Martin Luther King Dr W, Cincinnati, OH, 45268, USA
| | - Amy Schwarber
- US Environmental Protection Agency, Office of Research & Development, 26 Martin Luther King Dr W, Cincinnati, OH, 45268, USA
| | - Margaret McCauley
- US Environmental Protection Agency, Region 10, 1200 Sixth Avenue, Seattle, WA, 98101, USA
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Lallement A, Siaud A, Peyrelasse C, Kaparaju P, Schraauwers B, Maunas S, Monlau F. Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential. Bioengineering (Basel) 2021; 8:bioengineering8110176. [PMID: 34821742 PMCID: PMC8614716 DOI: 10.3390/bioengineering8110176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/29/2021] [Accepted: 11/01/2021] [Indexed: 11/16/2022] Open
Abstract
Anaerobic digestion for the valorization of organic wastes into biogas is gaining worldwide interest. Nonetheless, the sizing of the biogas plant units require knowledge of the quantity of feedstock, and their associated methane potentials, estimated widely by Biochemical Methane Potential (BMP) tests. Discrepancies exist among laboratories due to variability of protocols adopted and operational factors used. The aim of this study is to verify the influence of some operational factors (e.g., analysis frequency, trace elements and vitamins solution addition and flushing gas), feedstock conservation and the source of inoculum on BMP. Among the operational parameters tested on cellulose degradation, only the type of gas used for flushing headspace of BMP assays had shown a significant influence on methane yields from cellulose. Methane yields of 344 ± 6 NL CH4 kg−1 VS and 321 ± 10 NL CH4 kg−1 VS obtained from assays flushed with pure N2 and N2/CO2 (60/40 v/v). The origin of inoculum (fed in co-digestion) only significantly affected the methane yields for straw, 253 ± 3 and 333 ± 3 NL CH4 kg−1 VS. Finally, freezing/thawing cycle effect depended of the substrate (tested on biowaste, manure, straw and WWTP sludge) with a possible effect of water content substrate.
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Affiliation(s)
- Audrey Lallement
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Aline Siaud
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Christine Peyrelasse
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Prasad Kaparaju
- School of Engineering and Built Environment, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia;
| | - Blandine Schraauwers
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Samuel Maunas
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Florian Monlau
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
- Correspondence:
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Osmotic shock pre-treatment of Chaetoceros muelleri wet biomass enhanced solvent-free lipid extraction and biogas production. ALGAL RES 2021. [DOI: 10.1016/j.algal.2020.102177] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation. ENERGIES 2020. [DOI: 10.3390/en14010150] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This study aimed to determine the effect of the low-temperature conditioning of excess dairy sewage sludge using solidified carbon dioxide on the efficiency of methane fermentation. An increase in the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio above 0.3 had no significant effect on chemical oxygen demand concentration in the dissolved phase. The highest chemical oxygen demand values, ranging from 490.6 ± 12.9 to 510.5 ± 28.5 mg·dm−3, were determined at solidified carbon dioxide to excess dairy sewage sludge ratio ranging from 0.3 to 0.5. The low-temperature conditioning caused ammonia nitrogen concentration to increase from 155.2 ± 10.2 to 185.9 ± 11.1 mg·dm−3 and orthophosphates concentration to increase from 198.5 ± 23.1 to 300.6 ± 35.9 mg·dm−3 in the dissolved phase. The highest unitary amount of biogas, reaching 630.2 ± 45.5 cm3·g o.d.m.−1, was produced in the variant with the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio of 0.3. Methane content of the biogas produced was at 68.7 ± 1.5%. Increased solidified carbon dioxide dose did not lead to any significant changes in biogas and methane production. The efficiency of biogas production from unconditioned excess dairy sewage sludge was lower by 43.0 ± 3.2%. The analysis demonstrated that the low-temperature conditioning is an energetic viable technology aiding the methane fermentation process.
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Fan T, Liu X, Zhao R, Zhang Y, Liu H, Wang Z, Wang F, Nie K, Deng L. Hydrolysis of food waste by hot water extraction and subsequent Rhizopus fermentation to fumaric acid. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 270:110954. [PMID: 32721361 DOI: 10.1016/j.jenvman.2020.110954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/04/2020] [Accepted: 06/10/2020] [Indexed: 06/11/2023]
Abstract
Food waste is considered a serious global societal problem. How to degrade of food waste in a green and effective way has been to a hot topic. In this work, a method with hot water extraction pretreatment of food waste was investigated and optimized. Under the optimal conditions, more than half of the solid food waste could be transferred to soluble sugars. Meanwhile, in order to improve the tolerance of Rhizopus arrhizus on the food waste hydrolysate, UV combined with chemical mutagenesis were carried out, and a mutant of Rhizopus RH-7-13-807 was obtained. With the mutant strain, the yield of fumaric acid fermented from food waste increased to 1.8 times compared with the original strain, and 23.94 g/L fumaric acid was obtained from the fermentation. Besides, the COD of food waste was evaluated for the degradation of food waste by the Rhizopus RH-7-13-807. The process would decrease the quantity of food waste to be disposed of, and benefit the environment.
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Affiliation(s)
- Tianyi Fan
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Xin Liu
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Ran Zhao
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Yapeng Zhang
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Huan Liu
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Zheng Wang
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Fang Wang
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Kaili Nie
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China.
| | - Li Deng
- Beijing Key Lab of Bioprocess, National Energy R&D Center for Biorefinery, Beijing, 100029, PR China; College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, PR China.
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8
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Zhang S, Zou L, Wan Y, Ye M, Ye J, Li YY, Liu J. Using an expended granular sludge bed reactor for advanced anaerobic digestion of food waste pretreated with enzyme: The feasibility and its performance. BIORESOURCE TECHNOLOGY 2020; 311:123504. [PMID: 32417658 DOI: 10.1016/j.biortech.2020.123504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 06/11/2023]
Abstract
The high content of solid organics in food waste (FW) results in a low and unstable anaerobic digestion (AD) efficiency. Improving methane production rate and process stability is attracting much attention towards advanced AD of FW. The feasibility of advanced AD of FW pretreated with enzyme was investigated by batch experiments and 164 days running of an expanded granular sludge bed (EGSB) reactor. Simulation study based on the results of batch experiments indicates it is possible to treat enzymatically pretreated FW using an EGSB reactor. During the running of an EGSB reactor, the organic loading rate went up to 20 g chemical oxygen demand (COD)/L.d, and the total COD removal rate reached 88%. The significance of this study is to achieve an advanced AD of enzymatically pretreated FW with a stable and efficient methane production with biogas residue being reduced greatly.
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Affiliation(s)
- Sitong Zhang
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Lianpei Zou
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Yulan Wan
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Min Ye
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Jiongjiong Ye
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Yu-You Li
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Jianyong Liu
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China.
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9
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El Achkar JH, Lendormi T, Salameh D, Louka N, Maroun RG, Lanoisellé JL, Hobaika Z. Influence of pretreatment conditions on lignocellulosic fractions and methane production from grape pomace. BIORESOURCE TECHNOLOGY 2018; 247:881-889. [PMID: 30060426 DOI: 10.1016/j.biortech.2017.09.182] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/25/2017] [Accepted: 09/26/2017] [Indexed: 06/08/2023]
Abstract
The lignocellulosic structure of grape pomace requires the use of pretreatments facilitating microbial decomposition of the matter and enhancing methane production. In this study, the effects of various pretreatments (freezing, alkaline treatment using NaOH and NH3, acid treatment using HCl, ultrasounds and pulsed electric fields) were examined in batch mode. The highest methane production (0.178Nm3kg-1 of COD) was attained after alkaline treatment with 10% NaOH w/w dry basis, at 20°C and for 24h. This result is due to the degradation of more than 50% of lignin and about 22% of cellulose present in grape pomace. The coupling of this pretreatment with freezing at -20°C exhibited the highest methane production of 0.2194±0.0007Nm3kg-1 of COD. When applied to a larger scale continuous digester, this coupled pretreatment increased methane production by about 27%, compared to the untreated samples, promoting the green valorization of the biomass.
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Affiliation(s)
- Jean H El Achkar
- Univ. Bretagne Sud, FRE CNRS 3744, IRDL, F-56300 Pontivy, France; Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon.
| | - Thomas Lendormi
- Univ. Bretagne Sud, FRE CNRS 3744, IRDL, F-56300 Pontivy, France
| | - Dominique Salameh
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
| | - Nicolas Louka
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
| | - Richard G Maroun
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
| | | | - Zeina Hobaika
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
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Food Waste to Energy: An Overview of Sustainable Approaches for Food Waste Management and Nutrient Recycling. BIOMED RESEARCH INTERNATIONAL 2017; 2017:2370927. [PMID: 28293629 PMCID: PMC5331173 DOI: 10.1155/2017/2370927] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/29/2016] [Accepted: 01/12/2017] [Indexed: 01/06/2023]
Abstract
Food wastage and its accumulation are becoming a critical problem around the globe due to continuous increase of the world population. The exponential growth in food waste is imposing serious threats to our society like environmental pollution, health risk, and scarcity of dumping land. There is an urgent need to take appropriate measures to reduce food waste burden by adopting standard management practices. Currently, various kinds of approaches are investigated in waste food processing and management for societal benefits and applications. Anaerobic digestion approach has appeared as one of the most ecofriendly and promising solutions for food wastes management, energy, and nutrient production, which can contribute to world's ever-increasing energy requirements. Here, we have briefly described and explored the different aspects of anaerobic biodegrading approaches for food waste, effects of cosubstrates, effect of environmental factors, contribution of microbial population, and available computational resources for food waste management researches.
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11
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Jin Y, Li Y, Li J. Influence of thermal pretreatment on physical and chemical properties of kitchen waste and the efficiency of anaerobic digestion. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 180:291-300. [PMID: 27240205 DOI: 10.1016/j.jenvman.2016.05.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The effects of thermal pretreatment at moderate temperatures (70, 80 and 90 °C) and high temperatures (120, 140 and 160 °C) over heating durations of 10-120 min on the physical and chemical properties of kitchen waste and on anaerobic digestion were investigated. The results show that thermal pretreatment significantly enhances the solubilisation of organic compounds (chemical oxygen demand, crude proteins, crude fats and volatile fatty acids) and their biodegradability during subsequent anaerobic digestion. High temperature and long heating duration are beneficial for the release and reduction of organic compounds, and the efficiency of subsequent anaerobic digestion is improved markedly under these conditions. Moreover, both the methane production rate and methane yield were observed to increase significantly at moderate treatment temperatures when the anaerobic digestion time was longer than 50 h.
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Affiliation(s)
- Yiying Jin
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Yangyang Li
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Jinhui Li
- School of Environment, Tsinghua University, Beijing 100084, China
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12
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Hagelqvist A, Granström K. Co-digestion of manure with grass silage and pulp and paper mill sludge using nutrient additions. ENVIRONMENTAL TECHNOLOGY 2016; 37:2113-2123. [PMID: 26776302 DOI: 10.1080/09593330.2016.1142000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
There is an increasing worldwide demand for biogas. Anaerobic co-digestion involves the treatment of different substrates with the aim of improving the production of biogas and the stability of the process. This study evaluates how methane production is affected by the co-digestion of pig and dairy manure with grass silage and pulp and paper mill sludge and assesses whether methane production is affected by factors other than nutrient deficiency, low buffering capacity, inadequate dilution, and an insufficient activity and amount of microorganism culture. Anaerobic digestion was performed in batch reactors under mesophilic conditions for 20 days. The season of grass silage and manure collection proved to be an important factor affecting methane production. Spring grass silage produced a maximum of 250 mL/VSadded and spring manure 150 mL/VSadded, whereas autumn grass silage produced at most 140 ml/VSadded and autumn manure 45 mL/VSadded. The pulp mill sludge used is comprised of both primary and secondary sludge and produced at most 50 mL/VSadded regardless of season; this substrate benefitted most from co-digestion.
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Affiliation(s)
| | - Karin Granström
- b Department of Engineering and Chemical Sciences , Karlstad University , Karlstad , Sweden
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Ventura JRS, Lee J, Jahng D. A comparative study on the alternating mesophilic and thermophilic two-stage anaerobic digestion of food waste. J Environ Sci (China) 2014; 26:1274-1283. [PMID: 25079836 DOI: 10.1016/s1001-0742(13)60599-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An alternating mesophilic and thermophilic two stage anaerobic digestion (AD) process was conducted. The temperature of the acidogenic (A) and methanogenic (M) reactors was controlled as follows: System 1 (S1) mesophilic A-mesophilic M; (S2) mesophilic A-thermophilic M; and (S3) thermophilic A-mesophilic M. Initially, the AD reactor was acclimatized and inoculated with digester sludge. Food waste was added with the soluble chemical oxygen demand (SCOD) concentrations of 41.4-47.0 g/L and volatile fatty acids of 2.0-3.2 g/L. Based on the results, the highest total chemical oxygen demand removal (86.6%) was recorded in S2 while S3 exhibited the highest SCOD removal (96.6%). Comparing S1 with S2, total solids removal increased by 0.5%; S3 on the other hand decreased by 0.1 % as compared to S1. However, volatile solids (VS) removal in S1, S2, and S3 was 78.5%, 81.7%, and 79.2%, respectively. S2 also exhibited the highest CH4 content, yield, and production rate of 70.7%, 0.44 L CH4/g VSadded, and 1.23 L CH4/(L·day), respectively. Bacterial community structure revealed that the richness, diversity, evenness, and dominance of S2 were high except for the archaeal community. The terminal restriction fragments dendrogram also revealed that the microbial community of the acidogenic and methanogenic reactors in S2 was distinct. Therefore, S2 was the best among the systems for the operation of two-stage AD of food waste in terms of CH4 production, nutrient removal, and microbial community structure.
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Affiliation(s)
- Jey-R Sabado Ventura
- Department of Environmental Engineering and Energy, Myongji University, Gyeonggi-Do 449-728, Korea
| | - Jehoon Lee
- Department of Environmental Engineering and Energy, Myongji University, Gyeonggi-Do 449-728, Korea
| | - Deokjin Jahng
- Department of Environmental Engineering and Energy, Myongji University, Gyeonggi-Do 449-728, Korea.
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14
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Schott ABS, Vukicevic S, Bohn I, Andersson T. Potentials for food waste minimization and effects on potential biogas production through anaerobic digestion. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2013; 31:811-819. [PMID: 23681829 DOI: 10.1177/0734242x13487584] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Several treatment alternatives for food waste can result in both energy and nutrient recovery, and thereby potential environmental benefits. However, according to the European Union waste management hierarchy, waste prevention should be the prioritized strategy to decrease the environmental burdens from all solid waste management. The aim of the present study was therefore to investigate the potential for food waste minimization among Swedish households through an investigation of the amount of avoidable food waste currently disposed of. A further aim was to investigate the effect on the national biogas production potential through anaerobic digestion of food waste, considering minimization potentials. A method for waste composition analyses of household food waste, where a differentiation between avoidable and unavoidable food waste is made, was used in a total of 24 waste composition analyses of household waste from Swedish residential areas. The total household food waste generation reached 3.4 kg (household and week)(-1), on average, of which 34% is avoidable. The theoretical methane (CH4) potential in unavoidable food waste reached 442 Ndm(3) (kg VS)(-1) or 128 Nm(3) tonne(-1) wet waste, while the measured (mesophilic CH4 batch tests) CH4 production reached 399 Ndm(3) (kg VS)(-1), which is lower than several previous assessments of CH4 production from household food waste. According to this study the combination of a decrease in food waste generation-in case of successful minimization-and decreased CH4 production from unavoidable food waste will thus result in lower total potential energy recovery from household food waste through anaerobic digestion CH4 potential than previously stated.
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Khardenavis AA, Wang JY, Ng WJ, Purohit HJ. Management of various organic fractions of municipal solid waste via recourse to VFA and biogas generation. ENVIRONMENTAL TECHNOLOGY 2013; 34:2085-2097. [PMID: 24350462 DOI: 10.1080/09593330.2013.817446] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A hybrid anaerobic solid-liquid system was used for anaerobic digestion of organic fraction of municipal solid waste (OFMSW) consisting of mixed food + fruit waste and vegetable waste. Hydrolysis and acidogenesis potential of the above wastes were evaluated with the aim of producing value-added products in the form of volatile fatty acids (VFAs) and biogas recovery. Efficient hydrolysis and acidogenesis of mixed food + fruit waste was observed at a hydraulic retention time (HRT) of 1-3 d with a five-fold increase in soluble chemical oxygen demand (SCOD) followed by VFA production consisting of 50-75% acetic acid. Longer time was required for hydrolysis of vegetable waste with optimum hydrolysis and SCOD generation at 9 d HRT followed by VFA synthesis consisting of 45% acetic acid. Higher inoculum:substrate ratios resulted in improved hydrolysis and acidogenesis rates for vegetable waste in shorter time of 6 d with higher VFA production and increase in acetic acid content to 70%. When acidogenic leachate was fed into methanogenic reactors, detectable biogas production was observed after 25 d with 37-53% SCOD removal from leachate from mixed food + fruit waste and methane production of 0.066-0.1 L g(-1) SCOD removed and methane content of 38%. Though biogas yield from acidogenic leachate from vegetable waste was lower, nearly 94% volatile solids (VS) removal was observed in the reactors thereby providing methane yield of 0.13-0.21 L g(-1) VS consumed. Thus, the study provided a method for generation of value-added products from an otherwise misplaced resource in the form of OFMSW.
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Affiliation(s)
- Anshuman Arun Khardenavis
- Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur 440020, India.
| | - Jing Yuan Wang
- Nanyang Environment & Water Research Institute, Nanyang Technological University, #06-08 Clean Tech One, 1 Cleantech Loop, Singapore 637141, Singapore
| | - Wun Jern Ng
- Nanyang Environment & Water Research Institute, Nanyang Technological University, #06-08 Clean Tech One, 1 Cleantech Loop, Singapore 637141, Singapore
| | - Hemant J Purohit
- Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur 440020, India
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Hu K, Jiang JQ, Zhao QL, Lee DJ, Wang K, Qiu W. Conditioning of wastewater sludge using freezing and thawing: role of curing. WATER RESEARCH 2011; 45:5969-76. [PMID: 21925694 DOI: 10.1016/j.watres.2011.08.064] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 08/18/2011] [Accepted: 08/29/2011] [Indexed: 05/16/2023]
Abstract
Freeze/thaw (F/T) treatment is an efficient pre-treatment process for biological sludges. When bulk sludge was frozen, tiny unfrozen regimes in the ice matrix were continuously dehydrated by surrounding ice fronts, termed as the "curing stage". This work demonstrated that the F/T treatment could not only enhance sludge dewaterability, but also solubilize organic matters from sludge matrix. Most enhancement of sludge dewaterability was achieved during bulk freezing stage, with the waste activated sludge more readily dewatered than the mixed sludges after treatment. Conversely, the freezing stage released only limited quantities of organic matters to liquid. Conversely, the curing contributed mostly on chemical oxygen demand (COD) solubilization and NH(3)-N release. The crystallization of intra-aggregate moisture was claimed to damage cell membranes so to release intracellular substances to surroundings. The F/T treatment with sufficient curing is advised to effectively condition biological sludge as the feedstock of the following anaerobic digestion process.
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Affiliation(s)
- Kai Hu
- School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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Ma J, Duong TH, Smits M, Verstraete W, Carballa M. Enhanced biomethanation of kitchen waste by different pre-treatments. BIORESOURCE TECHNOLOGY 2011; 102:592-9. [PMID: 20813520 DOI: 10.1016/j.biortech.2010.07.122] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 07/29/2010] [Accepted: 07/31/2010] [Indexed: 05/23/2023]
Abstract
Five different pre-treatments were investigated to enhance the solubilisation and anaerobic biodegradability of kitchen waste (KW) in thermophilic batch and continuous tests. In the batch solubilisation tests, the highest and the lowest solubilisation efficiency were achieved with the thermo-acid and the pressure-depressure pre-treatments, respectively. However, in the batch biodegradability tests, the highest cumulative biogas production was obtained with the pressure-depressure method. In the continuous tests, the best performance in terms of an acceptable biogas production efficiency of 60% and stable in-reactor CODs and VFA concentrations corresponded to the pressure-depressure reactor, followed by freeze-thaw, acid, thermo-acid, thermo and control. The maximum OLR (5 g COD L(-1) d(-1)) applied in the pressure-depressure and freeze-thaw reactors almost doubled the control reactor. From the overall analysis, the freeze-thaw pre-treatment was the most profitable process with a net potential profit of around 11.5 € ton(-1) KW.
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Affiliation(s)
- Jingxing Ma
- Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, University of Gent, Coupure Links 653, B-9000 Gent, Belgium.
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Sreekanth D, Sivaramakrishna D, Himabindu V, Anjaneyulu Y. Thermophilic treatment of bulk drug pharmaceutical industrial wastewaters by using hybrid up flow anaerobic sludge blanket reactor. BIORESOURCE TECHNOLOGY 2009; 100:2534-2539. [PMID: 19135360 DOI: 10.1016/j.biortech.2008.11.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Revised: 11/14/2008] [Accepted: 11/14/2008] [Indexed: 05/27/2023]
Abstract
The hybrid up flow anaerobic sludge blanket reactor was evaluated for efficacy in reduction of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) of bulk drug pharmaceutical wastewater under different operational conditions. The start-up of the reactor feed came entirely with glucose, applied at an organic loading rate (OLR) 1 kg COD/m(3) d. Then the reactor was studied at different OLRs ranging from 2 to 11 kg COD/m(3)d with pharmaceutical wastewater. The optimum OLR was found to be 9 kg COD/m(3)d, where we found 65-75% COD and 80-94% of BOD reduction with biogas production containing 60-70% of methane and specific methanogenic activity was 320 ml CH(4)/g-VSS d. By the characterization studies of effluent using GC-MS, the hazardous compounds like phenol, l,2-methoxy phenol, 2,4,6-trichloro phenol, dibutyl phthalate, 1-bromo naphthalene, carbamazepine and antipyrine were present. After the treatment, these compounds degraded almost completely except carbamazepine. Thermophilic methanothrix and methanosaetae like bacteria are present in the granular sludge.
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Affiliation(s)
- D Sreekanth
- Centre for Environment, Institute of Science and Technology, Jawaharlal Nehru Technological University, Kukatpally, Hyderabad 500 085, Andhra Pradesh, India
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