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Chen Z, Gao S, Zhu S, Yu J, Wen X. Continuous chain elongation process for carbon resource recovery from excess sludge: Enhanced n-caprylate production and specific microbial functionalities. BIORESOURCE TECHNOLOGY 2024; 406:130937. [PMID: 38852892 DOI: 10.1016/j.biortech.2024.130937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 05/29/2024] [Accepted: 06/06/2024] [Indexed: 06/11/2024]
Abstract
Thermal hydrolyzed sludge (THS) exhibits considerable promise in generating medium-chain fatty acids (MCFAs) through chain elongation (CE) technology. This study developed a novel continuous CE process using THS as the substrate, achieving an optimal ethanol loading rate (5.8 g COD/L/d) and stable MCFA production at 10.9 g COD/L, with a rate of 3.6 g COD/L/d. The MCFAs primarily comprised n-caproate and n-caprylate, representing 41.5 % and 54.3 % of the total MCFAs, respectively. Utilization efficiencies for ethanol and acetate were nearly complete at 100 % and 92.8 %, respectively. Key microbial taxa identified under these optimal conditions included Alcaligenes, SRB2, Sporanaerobacter, and Kurthia, which were instrumental in critical pathways such as the generation of acetyl-CoA, the initial carboxylation of acetyl-CoA, the fatty acid biosynthesis cycle, and energy metabolism. This research provides a theoretical and technical blueprint for converting waste sludge into valuable MCFAs, promoting sustainable waste-to-resource strategies.
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Affiliation(s)
- Zhan Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Shan Gao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Shihui Zhu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jinlan Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xianghua Wen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
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2
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Gao S, Chen Z, Zhu S, Yu J, Wen X. Enhancement of medium-chain fatty acids production from sludge anaerobic fermentation liquid under moderate sulfate reduction. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120459. [PMID: 38402788 DOI: 10.1016/j.jenvman.2024.120459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 01/10/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024]
Abstract
In recent years, there has been a marked increase in the production of excess sludge. Chain-elongation (CE) fermentation presents a promising approach for carbon resource recovery from sludge, enabling the transformation of carbon into medium-chain fatty acids (MCFAs). However, the impact of sulfate, commonly presents in sludge, on the CE process remains largely unexplored. In this study, batch tests for CE process of sludge anaerobic fermentation liquid (SAFL) under different SCOD/SO42- ratios were performed. The moderate sulfate reduction under the optimum SCOD/SO42- of 20:1 enhanced the n-caproate production, giving the maximum n-caproate concentration, selectivity and production rate of 5.49 g COD/L, 21.4% and 4.87 g COD/L/d, respectively. The excessive sulfate reduction under SCOD/SO42- ≤ 5 completely inhibited the CE process, resulting in almost no n-caproate generation. The variations in n-caproate production under different conditions of SCOD/SO42- were all well fitted with the modified Gompertz kinetic model. Alcaligenes and Ruminococcaceae_UCG-014 were the dominant genus-level biomarkers under moderate sulfate reduction (SCOD/SO42- = 20), which enhanced the n-caproate production by increasing the generation of acetyl-CoA and the hydrolysis of difficult biodegradable substances in SAFL. The findings presented in this work elucidate a strategy and provide a theoretical framework for the further enhancement of MCFAs production from excess sludge.
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Affiliation(s)
- Shan Gao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Zhan Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Shihui Zhu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jinlan Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xianghua Wen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
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3
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Lin M, Qiao W, Ren L, Sun Y, Zhang J, Dong R. Determination of effects of thermophilic and hyperthermophilic temperatures on anaerobic hydrolysis and acidogenesis of pig manure through a one-year study. BIORESOURCE TECHNOLOGY 2024; 391:129890. [PMID: 37858802 DOI: 10.1016/j.biortech.2023.129890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/01/2023] [Accepted: 10/16/2023] [Indexed: 10/21/2023]
Abstract
Improving hydrolysis and acidogenesis through thermophilic and hyperthermophilic temperatures is critical for enhancing the anaerobic decomposition of organic waste like pig manure. However, whether higher temperatures can provide more enhanced performance has not been elucidated experimentally. This study, therefore, conducted a 375-day continuous operation experiment at 55 and 70 °C with a 5-day hydraulic retention time. The two temperature reactors entered a stable state after about 200 days and long-term microbial acclimation markedly changed their performances. In the thermophilic and hyperthermophilic reactor, the hydrolysis efficiencies were obtained at 29.7 % and 27.3 % respectively, whereas the acidogenesis efficiency was relatively low at 1.0 % and 3.1 %. Due to the occurrence of methanogenesis, the volatile fatty acid concentration in the thermophilic reactor was only 45 % of that in the hyperthermophilic reactor. The thermophilic reactor exhibited higher bacterial diversity; however, this difference between the two reactors apparently did not correlate with hydrolysis and acidogenesis performance.
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Affiliation(s)
- Min Lin
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Wei Qiao
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China.
| | - Lijuan Ren
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Yibo Sun
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Jiahao Zhang
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Renjie Dong
- College of Engineering, China Agricultural University, Beijing 100083, China
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4
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Chen Z, Zhu S, Gao S, Sun C, Tian Z, Wen X. A hyperthermophilic anaerobic fermentation platform for highly efficient short chain fatty acids production from thermal hydrolyzed sludge. WATER RESEARCH 2023; 243:120434. [PMID: 37573843 DOI: 10.1016/j.watres.2023.120434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/27/2023] [Accepted: 07/28/2023] [Indexed: 08/15/2023]
Abstract
In this study, a carboxylate platform of hyperthermophilic (70 ℃) anaerobic fermentation (HAF) for short chain fatty acids (SCFAs) production from thermal hydrolyzed sludge (THS) was established. The long-term performance for SCFAs production and the microbial communities of this HAF under different SRTs were systematically investigated. Under the optimum SRT of 3 d, the HAF had the highest acetate production rate of 1.12 g COD/L/d which accounted for 60% in SCFAs. It also rendered a good performance in SCFAs production, with concentration, production rate and yield of 6.61 g COD/L, 1.86 g COD/L/d and 324 g COD/kg VSSin, respectively. Nearly no biogas produced from this system, which reduced the loss of carbon sources from the system. This was due to the inhibition of methanogenesis by the hyperthermophilic condition and the high content of total ammonia nitrogen (TAN) and free ammonia nitrogen (FAN). Tepidimicrobium, Bhargavaea and XBB1006 were the dominant genus-level biomarkers under the optimum SRT, which facilitated the decomposition of monosaccharides, amino acids, terpenoids and polyketides into SCFAs. This work provides an applicable anaerobic carboxylate platform for highly efficient SCFAs production from excess sludge.
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Affiliation(s)
- Zhan Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Shihui Zhu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Shan Gao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Chenxiang Sun
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Zeshen Tian
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xianghua Wen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
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Liczbiński P, Borowski S, Cieciura-Włoch W. Anaerobic co-digestion of kitchen waste with hyperthermophilically pretreated grass for biohydrogen and biomethane production. BIORESOURCE TECHNOLOGY 2022; 364:128053. [PMID: 36195216 DOI: 10.1016/j.biortech.2022.128053] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/24/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Anaerobic digestion of kitchen waste with grass after hyperthermophilic pretreatment was performed in semi-continuously operated reactors. The greatest methane yield of 293 NmlCH4/gVS (volatile solids) was reported for the mixture of both substrates at 55 °C with a solids retention time of 30 d and the corresponding organic lading rate of 1.72 kgVS/m3/d. In contrast, pretreated grass subjected to thermophilic digestion produced only 131 NmlCH4/gVS. However, when mesophilic conditions were applied, the digestion process turned into dark fermentation, especially visible for the mixture. Metagenomic analysis revealed the dominance Ruminococcaceae, Atopobiaceae and Lactobacillaceae at a family level in mesophilic processes, whereas Petrotogaceae, Synergistaceae, Hungateiclostridiaceae, Planococcaceae and two methanogens Methanosarcinaceae and Methanothermobacteriaceae were the most frequent microbes of thermophilic digestion. Kitchen waste can successfully be co-digested with hyperthermophilically pretreated grass at high loading rates, however the digesters must be operated at thermophilic temperatures.
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Affiliation(s)
- Przemysław Liczbiński
- Department of Environmental Biotechnology, Łódź University of Technology, Wólczańska 171/173, 90-530 Lodz, Poland.
| | - Sebastian Borowski
- Department of Environmental Biotechnology, Łódź University of Technology, Wólczańska 171/173, 90-530 Lodz, Poland.
| | - Weronika Cieciura-Włoch
- Department of Environmental Biotechnology, Łódź University of Technology, Wólczańska 171/173, 90-530 Lodz, Poland.
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Oduor WW, Wandera SM, Murunga SI, Raude JM. Enhancement of anaerobic digestion by co-digesting food waste and water hyacinth in improving treatment of organic waste and bio-methane recovery. Heliyon 2022; 8:e10580. [PMID: 36148270 PMCID: PMC9485044 DOI: 10.1016/j.heliyon.2022.e10580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/09/2022] [Accepted: 09/05/2022] [Indexed: 11/29/2022] Open
Abstract
In Kenya, 57% of the municipal solid waste generated is Food waste (FW) which has high organic content. However, the treatment and bioconversion of FW to biogas have always been challenging due to its rapid biodegradation, resulting from rapid hydrolysis and accumulation of volatile fatty acids and lowering pH in the bioreactor. In this study, the anaerobic digestibility of FW as a mono substrate was compared to co-digestion of FW with water hyacinth (WH) for improved biogas production and organic matter removal efficiency in a laboratory batch reactor. Different mix proportions of FW and WH were co-digested under mesophilic conditions (37 °C) at a dilution of 6% (w/v) Total Solids (TS) content. The TS of the substrates (Food waste and Water Hyacinth) were pre-processed to have a concentration of TS at 6% (60 g/L) to operate a wet AD which requires the substrate to be less than 15% TS. The proportions of WH: FW (v/v) were 100:0, 85:15, 70:30, 55:45, 30:70, 15:85, and 0:100. In the batch rectors the anaerobic co-digestion was conducted with Substrate to Inoculum (S/I) ratio of 1:1. FW is generally considered to have high volatile solids which hydrolyze rapidly lowering pH arising from excess production of Hydrogen which in presence of CO2 and acetogenic bacteria leads to more production of acetate, formate and other long chain fatty acids which inhibits methanogenesis as a result of rapid acidification. The rapid acidification of the bioreactors that are used to treat FW results in the inhibition of the methanogenesis process. The co-digestion of the substrates could have improved the process parameters by reducing acidity caused by the high C/N ratio, reducing the inhibitory range, and increasing the buffer capacity which enhanced the bio-methane potential and the microbial activity. The batch experiments were set in triplicate for both cases of FW, WH, mixtures, and Inoculum. The results showed that the average gas yields after 81 days for the various mix proportions were 256.27and 357.69 ml/g-VS for mono-digestion of WH and FW respectively. For the mixtures of WH: FW the average reported biogas production were 305.01, 280.27, 548.91,616.01 and 270.87 ml/g-VS for mixtures of 15:85, 30:70, 55:45,70:30 and 85:15 respectively. The modified Gompertz model showed that the digesters with WH and FW alone had lag times of 2.599 and 1.052 days respectively. The mix substrates of WH: FW 85:15, 70:30, 55:45, 30:70 and 15:85 shown lag times of 2.456, 3.777, 2.574, 1.956 and 1.75 days respectively. A mix (WH: FW) of 70:30 had the highest maximum specific biogas production Rmax and the maximum biogas production potential of 18.19 mlCH4/gVS per day and 607.7mlCH4/gVS respectively. The R2 and RSME values ranged from 0.9867 to 0.9963 and 2.663 to 9.359 respectively in all the digesters. The study shows that the co-digestion of WH and FW in the mix ratio of 70:30 improved the volume of biogas produced and organic matter removal efficiency reached 79%.
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Affiliation(s)
- William W Oduor
- Department of Civil, Construction and Environmental Engineering, Jomo Kenyatta University of Agriculture and Technology, P. O. Box 62000-00200, Nairobi, Kenya.,Department of Water and Waste Water Engineering Kenya Water Institute, P. O. Box 60013-00200, Nairobi, Kenya
| | - Simon M Wandera
- Department of Civil, Construction and Environmental Engineering, Jomo Kenyatta University of Agriculture and Technology, P. O. Box 62000-00200, Nairobi, Kenya
| | - Sylvia I Murunga
- Department of Agricultural and Biosystems Engineering, Jomo Kenyatta University of Agriculture and Technology, P. O. Box 62000-00200, Nairobi, Kenya
| | - James M Raude
- Soil, Water and Environmental Engineering Department (SWEED), Jomo Kenyatta University of Agriculture and Technology, P. O. Box 62000-00200, Nairobi, Kenya
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Wang S, Xu C, Song L, Zhang J. Anaerobic Digestion of Food Waste and Its Microbial Consortia: A Historical Review and Future Perspectives. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19159519. [PMID: 35954875 PMCID: PMC9367938 DOI: 10.3390/ijerph19159519] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 02/04/2023]
Abstract
Renewable energy source, such as food waste (FW), has drawn great attention globally due to the energy crisis and the environmental problem. Anaerobic digestion (AD) mediated by novel microbial consortia is widely used to convert FW to clean energy. Despite of the considerable progress on food waste and FWAD optimization condition in recent years, a comprehensive and predictive understanding of FWAD microbial consortia is absent and therefore represents a major research challenge in FWAD. The review begins with a global view on the FWAD status and is followed by an overview of the role of AD key conditions’ association with microbial community variation during the three main energy substances (hydrogen, organic acids, and methane) production by FWAD. The following topic is the historical understanding of the FWAD microorganism through the development of molecular biotechnology, from classic strain isolation to low-throughput sequencing technologies, to high-throughput sequencing technologies, and to the combination of high-throughput sequencing and isotope tracing. Finally, the integration of multi-omics for better understanding of the microbial community activity and the synthetic biology for the manipulation of the functioning microbial consortia during the FWAD process are proposed. Understanding microbial consortia in FWAD helps us to better manage the global renewable energy source.
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Affiliation(s)
- Shuijing Wang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230039, China;
| | - Chenming Xu
- College of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China;
| | - Liyan Song
- School of Resources and Environmental Engineering, Anhui University, Hefei 230039, China;
- Correspondence: (L.S.); (J.Z.); Tel.: +86-55163861441 (L.S.); +86-55163828252 (J.Z.); Fax: +86-55163861724 (L.S.); +86-55163828252 (J.Z.)
| | - Jin Zhang
- College of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China;
- Correspondence: (L.S.); (J.Z.); Tel.: +86-55163861441 (L.S.); +86-55163828252 (J.Z.); Fax: +86-55163861724 (L.S.); +86-55163828252 (J.Z.)
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8
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Lin M, Ren L, Mdondo Wandera S, Liu Y, Dong R, Qiao W. Enhancing pathogen inactivation in pig manure by introducing thermophilic and hyperthermophilic hygienization in a two-stage anaerobic digestion process. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 144:123-131. [PMID: 35344788 DOI: 10.1016/j.wasman.2022.03.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
Conventional mesophilic anaerobic digestion (AD) is widely used to treat animal manure, but pathogen inactivation remains a significant challenge. Thermophilic and hyperthermophilic hydrolysis pretreatment was thus introduced as a hygienization step in a two-stage anaerobic digestion process. Results from 100-day experiments showed culturable Escherichia coli (E. coli) reduction was up to 6.9 log10 through a hygienization step, but RT-qPCR tests showed much less reduction in viable E. coli. The difference between viable and culturable cells revealed the complexity in pathogen inactivation. High-throughput sequencing indicated that the second stage in the two-stage AD further reduced the relative abundance of pathogens, including Enterococcus, Streptococcus, and Acinetobacter, while Clostridium_sensu_stricto still exhibited high relative abundance. Thermophilic hygienization induced a 6.7% increment in methane production, while hyperthermophilic pretreatment showed minimal effect on methane production. Focusing on the energy recovery and environmental safety point of view, the introduction of an integrated system incorporating the thermophilic and two-stage anaerobic process is recommended.
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Affiliation(s)
- Min Lin
- College of Engineering, China Agricultural University, Beijing 100083, China; Research & Development Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, National Development and Reform Committee (BGFuels), Beijing 100083, China
| | - Lijuan Ren
- College of Engineering, China Agricultural University, Beijing 100083, China; Research & Development Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, National Development and Reform Committee (BGFuels), Beijing 100083, China
| | - Simon Mdondo Wandera
- Department of Civil, Construction & Environmental Engineering, Jomo Kenyatta University of Agriculture & Technology, Box 62000, Nairobi, Kenya
| | - Yi Liu
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, China.
| | - Renjie Dong
- College of Engineering, China Agricultural University, Beijing 100083, China; Research & Development Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, National Development and Reform Committee (BGFuels), Beijing 100083, China
| | - Wei Qiao
- College of Engineering, China Agricultural University, Beijing 100083, China; Research & Development Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, National Development and Reform Committee (BGFuels), Beijing 100083, China.
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9
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Yang L, Chen L, Li H, Deng Z, Liu J. Lactic acid production from mesophilic and thermophilic fermentation of food waste at different pH. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 304:114312. [PMID: 34942551 DOI: 10.1016/j.jenvman.2021.114312] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/19/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
It is promising to recover lactic acid (LA) from fermentation of food waste (FW). In this study, pH and temperatures were investigated comprehensively to find their effects on LA fermentation, and microbial analyses were used to take insight to the variation of LA production. The results showed that mesophilic fermentation benefited hydrolysis and acidification, leading to a high yield of LA, while thermophilic conditions restricted other producers at low pH, leading to a high purity of LA. Lactobacillus amylolyticus was the main LA producer under thermophilic conditions, but Thermoanaerobacterium thermosaccharolyticum boomed at pH 5.0-6.0 and it converted LA partly to butyric acid. Simultaneously, Bacillus coagulans also increased and improved the optical purity (OP) of L-LA. From a series of this study, an operational condition of pH 5.5 and temperature of 52 °C would be potentially suitable for lactate fermentation of FW with high purity of 89%, while a stable LA production with an OP of 68% was achieved at 55 °C and pH 6.0.
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Affiliation(s)
- Luxin Yang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Liang Chen
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Huan Li
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Zhou Deng
- Shenzhen Lisai Environmental Technology Co, Ltd., Shenzhen, 518055, China
| | - Jianguo Liu
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; School of Environment, Tsinghua University, Beijing, 100084, China
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10
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Liczbiński P, Borowski S. Effect of hyperthermophilic pretreatment on methane and hydrogen production from garden waste under mesophilic and thermophilic conditions. BIORESOURCE TECHNOLOGY 2021; 335:125264. [PMID: 34004562 DOI: 10.1016/j.biortech.2021.125264] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/04/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
Anaerobic digestion of garden waste was investigated in a two-stage process consisting of hyperthermophilic pretreatment followed by mesophilic or thermophilic fermentation. The greatest digestion performance was achieved when the substrates were first treated at 70 °C for 3 days with no inoculation, and then mixed with inoculum (anaerobic sludge) and subjected to anaerobic digestion at 55 °C. Under such conditions, the maximum methane and hydrogen yields from grass were 517 NmlCH4/kgVS and 52 NmlH2/kgVS, whereas the corresponding values for leaves were 421 NmlCH4/kgVS and 23 NmlH2/kgVS, and these figure were far greater than the yields obtained in experiments with no hyperthermophilic stage. A metagenomic analysis of hyperthermophilic environments revealed the appearance of thermophilic and hyperthermophilic bacteria showing hydrolytic activity against lignocellulosic materials, including Caldicellulosiruptor, Thermovenabulum, Thermoanaerobacter, Moorella, Tepimicrobium, Geobacillus and Thermobacillus at a genus level. A noticeable methane production in the hyperthermophilic stage could be linked to the presence of Methanothermobacter sp.
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Affiliation(s)
- Przemysław Liczbiński
- Department of Environmental Biotechnology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Wolczanska 171/173, 90-924 Lodz, Poland
| | - Sebastian Borowski
- Department of Environmental Biotechnology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Wolczanska 171/173, 90-924 Lodz, Poland.
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11
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Quashie FK, Feng K, Fang A, Agorinya S, Antwi P, Kabutey FT, Xing D. Efficiency and key functional genera responsible for simultaneous methanation and bioelectricity generation within a continuous stirred microbial electrolysis cell (CSMEC) treating food waste. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 757:143746. [PMID: 33229085 DOI: 10.1016/j.scitotenv.2020.143746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/30/2020] [Accepted: 10/31/2020] [Indexed: 06/11/2023]
Abstract
This study reveals the efficient treatment of high strength food waste under varying hydraulic retention times (48 h, 36 h and 24 h) in a continuous stirred tank reactor (CSTR) integrated with microbial electrolysis cell (MEC) to become a continuous stirred microbial electrolysis cell (CSMEC). COD removal efficiency in the CSMEC surpassed 92% with OLR ranging from 0.4 to 21.31 kg COD/m3·d compared to that of the CSTR. The maximum current density (based on the cathode surface area) was 1125.35 ± 81 mA/m2 in the CSMEC. Biogas yield and methane production rates increased by 16.5% and 19.3% in the CSMEC respectively compared to the CSTR. CSMEC was 1.52 times better in performance compared to the CSTR. Firmicutes, Synergistetes, Bacteroidetes, Thermotogae, Chloroflexi and Proteobacteria were the dominant phyla associated with both CSMEC and CSTR. Archaeal microbial community analysis showed Methanosaeta, Methanobacterium, Methanosarcina and Methanocorpusculum as the dominant populations associated with the CSMEC.
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Affiliation(s)
- Frank Koblah Quashie
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; Nuclear Application Centre (NAC), National Nuclear Research Institute (NNRI), Ghana Atomic Energy Commission (GAEC), P.O. Box LG 80, Legon, Ghana
| | - Kun Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Anran Fang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Sarah Agorinya
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Philip Antwi
- Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Felix Tetteh Kabutey
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Defeng Xing
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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12
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Wang Y, Wang Z, Zhang Q, Li G, Xia C. Comparison of bio-hydrogen and bio-methane production performance in continuous two-phase anaerobic fermentation system between co-digestion and digestate recirculation. BIORESOURCE TECHNOLOGY 2020; 318:124269. [PMID: 33099098 DOI: 10.1016/j.biortech.2020.124269] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 10/10/2020] [Accepted: 10/12/2020] [Indexed: 05/25/2023]
Abstract
The effect of co-digestion of food waste (FW) and cow dung (CD) with different ratios, and digestate recirculation with different recirculation ratios (RR) on the substrate degradation and energy production in continuous two-stage anaerobic fermentation system was investigated. Results from experiments indicated that co-digestion and digestate recirculation could promote the hydrogen production rate (HPR) and the methane production rate (MPR). Maximum HPR and MPR of 3.3 and 3.1 L/L/d were achieved for two-stage fermentation with recirculation system at RR of 0.4. Meanwhile, both co-digestion and digestate recirculation technology could reduce the amount of alkali addition to maintain pH in the hydrogen-reactor. Compared to digestate recirculation, co-digestion of FW and CD promote much more energy production, 654.9 and 4854.8 kJ/kgVSr were obtained from the co-digestion of FW and CD with the ratio of 2:1 in the hydrogen reactor and the methane reactor.
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Affiliation(s)
- Yanjin Wang
- Institute of Agricultural Engineering, Huanghe Science and Technology University, Zhengzhou 450063, China
| | - Zhenfeng Wang
- Collaborative Innovation Center of Biomass Energy, Henan Province, Henan Agricultural University, Zhengzhou 450002, China
| | - Quanguo Zhang
- Institute of Agricultural Engineering, Huanghe Science and Technology University, Zhengzhou 450063, China.
| | - Gaoshen Li
- Institute of Agricultural Engineering, Huanghe Science and Technology University, Zhengzhou 450063, China
| | - Chenxi Xia
- Institute of Agricultural Engineering, Huanghe Science and Technology University, Zhengzhou 450063, China
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13
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Hyperthermophilic Treatment of Grass and Leaves to Produce Hydrogen, Methane and VFA-Rich Digestate: Preliminary Results. ENERGIES 2020. [DOI: 10.3390/en13112814] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, the feasibility of hydrogen and methane production from grass and leaves via hyperthermophilic anaerobic digestion was investigated. The hyperthermophilic treatment of grass at 70 °C resulted in the highest concentrations of volatile fatty acids (TVFA) and reducing sugars in the supernatant of over 21 and 6.5 g/L reported on day 3 and 4 of the experiment. In contrast, hydrolysis and acidification of leaves performed slower and with lower efficiency, as the peak concentrations of TVFA and reducing sugars were observed at the end of the process. However, the highest cumulative hydrogen and methane yields of 69.64 mLH2/gVS and 38.63 mLCH4/gVS were reported for leaves digested at 70 °C, whereas the corresponding maximum productions observed for grass were 50 mLH2/gVS and 1.98 mLCH4/gVS, respectively. A temperature increase to 80 °C hampered hydrogen and methane production and also resulted in lower yields of volatile fatty acids, reducing sugars and ammonia as compared to the corresponding values reported for 70 °C.
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14
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Meena RAA, Rajesh Banu J, Yukesh Kannah R, Yogalakshmi KN, Kumar G. Biohythane production from food processing wastes - Challenges and perspectives. BIORESOURCE TECHNOLOGY 2020; 298:122449. [PMID: 31784253 DOI: 10.1016/j.biortech.2019.122449] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/16/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
The food industry generates enormous quantity of food waste (FW) either directly or indirectly including the processing sector, which turned into biofuels for waste remediation. Six types of food processing wastes (FPW) such as oil, fruit and vegetable, dairy, brewery, livestock and finally agriculture based materials that get treated via dark fermentation/anaerobic digestion has been discussed. Production of both hydrogen and methane is daunting for oil, fruit and vegetable processing wastes because of the presence of polyphenols and essential oils. Moreover, acidic pH and high protein are the reasons for increased concentration of ammonia and accumulation of volatile fatty acids in FPW, especially in dairy, brewery, and livestock waste streams. Moreover, the review brought to forefront the enhancing methods, (pretreatment and co-digestion) operational, and environmental parameters that can influence the production of biohythane. Finally, the nature of feedstock's role in achieving successful circular bio economy is also highlighted.
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Affiliation(s)
| | - J Rajesh Banu
- Department of Civil Engineering, Anna University Regional Campus Tirunelveli, India
| | - R Yukesh Kannah
- Department of Civil Engineering, Anna University Regional Campus Tirunelveli, India
| | - K N Yogalakshmi
- Department of Environmental Science and Technology, School of Environment and Earth Sciences, Central University of Punjab, Bathinda 151001, Punjab, India
| | - Gopalakrishnan Kumar
- Green Processing, Bioremediation and Alternative Energies Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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15
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Yin DM, Qiao W, Negri C, Adani F, Fan R, Dong RJ. Enhancing hyper-thermophilic hydrolysis pre-treatment of chicken manure for biogas production by in-situ gas phase ammonia stripping. BIORESOURCE TECHNOLOGY 2019; 287:121470. [PMID: 31121449 DOI: 10.1016/j.biortech.2019.121470] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 05/08/2019] [Accepted: 05/11/2019] [Indexed: 06/09/2023]
Abstract
Hydrolysis is normally the rate limiting step for anaerobic digestion (AD). In this study, hyper-thermophilic (70 °C) pre-treatment of chicken manure under HRTs of 10, 5, 3, 2 and 1 d(s) was investigated to enhance the hydrolysis efficiency for biogas production. In-situ phase gas stripping was integrated into the pre-treatment reactor to remove ammonia-N and to enhance the hydrolysis performance. The results showed that in-situ gas stripping removed 18%-31% of ammonia-N and improved hydrolysis by 2.6%-31.1%. The methane yield of pre-hydrolyzed chicken manure reached 518 mL g-VS-1 under optimal HRT 3 days, which was 54.6% higher than that obtained from the control reactor. However, shortening HRTs below 3 days resulted in a significant reduction in hydrolysis efficiency. The percent of hydrolysis and acidogenesis bacteria reduced to 40.6% at HRT 1 d. 16sRNA results indicated existence of methanogens in pre-hydrolysis reactor. Further optimizing of ammonia stripping was thus needed for hydrolysis pre-treatment.
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Affiliation(s)
- Dong-Min Yin
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China
| | - Wei Qiao
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China.
| | - Camilla Negri
- Gruppo Ricicla - DiSAA - University of Milan, via Celoria 2, 20133 Milano, Italy
| | - Fabrizio Adani
- Gruppo Ricicla - DiSAA - University of Milan, via Celoria 2, 20133 Milano, Italy
| | - Run Fan
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China
| | - Ren-Jie Dong
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China
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16
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Xiong Z, Hussain A, Lee HS. Food waste treatment with a leachate bed reactor: Effects of inoculum to substrate ratio and reactor design. BIORESOURCE TECHNOLOGY 2019; 285:121350. [PMID: 31004951 DOI: 10.1016/j.biortech.2019.121350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/10/2019] [Accepted: 04/13/2019] [Indexed: 06/09/2023]
Abstract
This study evaluated the effects of different inoculum to substrate ratios (ISRs) (5, 10, 15%) on hydrolysis and acidogenesis of food waste in a conventional leachate bed reactor (LBR-C) and a novel fractionalized LBR (LBR-F). At ISR of 10%, LBR-C experienced clogging and thus the solid removal and VFA production reduced significantly. Without any clogging events at high ISR of 10%, LBR-F achieved significantly higher (p < 0.05) VS removal of 91%, hydrolysis yield of 837 g cumulative sCOD/kg volatile solids (VS), and VFA yield of 669 g COD/kg VS. Hydrogen yield was as high as 20 m3/ton food waste in LBR-F. Energy balance indicated that the LBR-F can be energy-positive for food waste treatment with net energy benefit of ∼8 kWh/ton food waste treated. Considering the high VFA yield, the LBR-F can also be a promising food waste fermentation system for the biorefinery platform.
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Affiliation(s)
- Ziyi Xiong
- Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Abid Hussain
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; Advanced Environmental Biotechnology Research Centre, Nanyang Environment and Water Research Institute, Singapore 637141, Singapore
| | - Hyung-Sool Lee
- Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
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17
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Qian M, Li Y, Zhang Y, Sun Z, Wang Y, Feng J, Yao Z, Zhao L. Efficient acetogenesis of anaerobic co-digestion of food waste and maize straw in a HSAD reactor. BIORESOURCE TECHNOLOGY 2019; 283:221-228. [PMID: 30913430 DOI: 10.1016/j.biortech.2019.03.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
In this study, food waste and maize straw were used as feedstock, and the two-phase high-solid anaerobic digestion (TP-HSAD) technology was used to optimize the process parameters of leachate reflux in acid-production stage. Results indicated that compared with other waste activated sludge, pig manure digestate (PM) as leachate can achieve better hydrolysis and acidification effect. The increase of leachate reflux ratio can shorten the fermentation time of the acid-producing stage and increase the fermentation efficiency. When the reflux ratio was 32:1, peak concentration of volatile fatty acids (VFAs) was 45.4 g/L and the volatile solids (VS) removal rate was 61.7%. Reflux frequency has minimal effect on the concentration of VFAs and the degree of degradation of VS, but a higher reflux frequency will prolong the reaction time of acid-production stage. When PM is used as reflux leachate, the HSAD reactor can improve the hydrolysis and acidification of the anaerobic fermentation.
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Affiliation(s)
- Mingyu Qian
- State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, College of New Energy and Materials, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China; Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, Germany; Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH Sunflower Tower 860 Maizidian Street 37, Chaoyang District, 100125 Beijing, PR China
| | - Yeqing Li
- State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, College of New Energy and Materials, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
| | - Yixin Zhang
- State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, College of New Energy and Materials, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China; Center of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, No. 41, Maizidian Street, Chaoyang District, Beijing 100125, PR China
| | - Ziyan Sun
- State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, College of New Energy and Materials, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
| | - Ying Wang
- State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, College of New Energy and Materials, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
| | - Jing Feng
- Center of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, No. 41, Maizidian Street, Chaoyang District, Beijing 100125, PR China; Key Laboratory of Energy Resource Utilization from Agriculture Residue, Ministry of Agriculture, Beijing 100125, PR China
| | - Zonglu Yao
- Center of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, No. 41, Maizidian Street, Chaoyang District, Beijing 100125, PR China; Key Laboratory of Energy Resource Utilization from Agriculture Residue, Ministry of Agriculture, Beijing 100125, PR China
| | - Lixin Zhao
- Center of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, No. 41, Maizidian Street, Chaoyang District, Beijing 100125, PR China; Key Laboratory of Energy Resource Utilization from Agriculture Residue, Ministry of Agriculture, Beijing 100125, PR China.
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18
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Wandera SM, Westerholm M, Qiao W, Yin D, Jiang M, Dong R. The correlation of methanogenic communities' dynamics and process performance of anaerobic digestion of thermal hydrolyzed sludge at short hydraulic retention times. BIORESOURCE TECHNOLOGY 2019; 272:180-187. [PMID: 30340183 DOI: 10.1016/j.biortech.2018.10.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 10/06/2018] [Accepted: 10/08/2018] [Indexed: 06/08/2023]
Abstract
Requirement of a long hydraulic retention time (HRT) for efficient degradation restrains the anaerobic digestion of hydrothermal pretreated sludge. Shortening the HRT can increase the treatment capacity of a plant but may also induce digester instability. This study investigated the impact of HRT on process performance and microbial community by consecutively operating a reactor for 145 days. The HRT was gradually decreased from 20 to 10, 5, and 3 days. The methane yield declined from 0.28 to 0.12 L/g-VSin with this shortening, and acetate concentration increased from 38 to 376 mg/L. Methanoculleus (58%) dominated methanogens at a 20 days HRT. However, the methanogenic structure shifted toward an increased level of Methanospirillum, representing 95% of the total archaea at a 3 days HRT. Microorganisms were almost washed out at the end of experiment. Conclusively, shortening HRTs is a feasible strategy to increase treatment capacity and produce more biogas at existing plants.
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Affiliation(s)
- Simon M Wandera
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee (BGFuels), Beijing 100083, China
| | - Maria Westerholm
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala BioCenter, Box 7025, SE-750 07 Uppsala, Sweden
| | - Wei Qiao
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee (BGFuels), Beijing 100083, China.
| | - Dongmin Yin
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee (BGFuels), Beijing 100083, China
| | - MengMeng Jiang
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee (BGFuels), Beijing 100083, China
| | - Renjie Dong
- College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee (BGFuels), Beijing 100083, China
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19
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Bolzonella D, Battista F, Cavinato C, Gottardo M, Micolucci F, Lyberatos G, Pavan P. Recent developments in biohythane production from household food wastes: A review. BIORESOURCE TECHNOLOGY 2018; 257:311-319. [PMID: 29501273 DOI: 10.1016/j.biortech.2018.02.092] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 02/19/2018] [Accepted: 02/20/2018] [Indexed: 06/08/2023]
Abstract
Biohythane is a hydrogen-methane blend with hydrogen concentration between 10 and 30% v/v. It can be produced from different organic substrates by two sequential anaerobic stages: a dark fermentation step followed by a second an anaerobic digestion step, for hydrogen and methane production, respectively. The advantages of this blend compared to either hydrogen or methane, as separate biofuels, are first presented in this work. The two-stage anaerobic process and the main operative parameters are then discussed. Attention is focused on the production of biohythane from household food wastes, one of the most abundant organic substrate available for anaerobic digestion: the main milestones and the future trends are exposed. In particular, the possibility to co-digest food wastes and sewage sludge to improve the process yield is discussed. Finally, the paper illustrates the developments of biohythane application in the automotive sector as well as its reduced environmental burden.
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Affiliation(s)
- David Bolzonella
- Dipartimento di Biotecnologie, Università degli Studi di Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Federico Battista
- Dipartimento di Biotecnologie, Università degli Studi di Verona, Strada Le Grazie 15, 37134 Verona, Italy.
| | - Cristina Cavinato
- Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari, Dorsoduro 3246, 30123 Venezia, Italy
| | - Marco Gottardo
- Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari, Dorsoduro 3246, 30123 Venezia, Italy
| | - Federico Micolucci
- Faculty of Engineering, Department of Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Gerasimos Lyberatos
- School of Chemical Engineering, National Technical University of Athens, Zografou 15780, Greece
| | - Paolo Pavan
- Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari, Dorsoduro 3246, 30123 Venezia, Italy
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20
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Abendroth C, Hahnke S, Simeonov C, Klocke M, Casani-Miravalls S, Ramm P, Bürger C, Luschnig O, Porcar M. Microbial communities involved in biogas production exhibit high resilience to heat shocks. BIORESOURCE TECHNOLOGY 2018; 249:1074-1079. [PMID: 29146311 DOI: 10.1016/j.biortech.2017.10.093] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 10/25/2017] [Accepted: 10/28/2017] [Indexed: 06/07/2023]
Abstract
We report here the impact of heat-shock treatments (55 and 70 °C) on the biogas production within the acidification stage of a two-stage reactor system for anaerobic digestion and biomethanation of grass. The microbiome proved both taxonomically and functionally very robust, since heat shocks caused minor community shifts compared to the controls, and biogas yield was not decreased. The strongest impact on the microbial profile was observed with a combination of heat shock and low pH. Since no transient reduction of microbial diversity occured after the shock, biogas keyplayers, but also potential pathogens, survived the treatment. All along the experiment, the heat-resistant bacterial profile consisted mainly of Firmicutes, Bacteroidetes and Proteobacteria. Bacteroides and Acholeplasma were reduced after heat shocks. An increase was observed for Aminobacterium. Our results prove the stability to thermal stresses of the microbial communities involved in acidification, and the resilience in biogas production irrespectively of the thermal treatment.
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Affiliation(s)
- Christian Abendroth
- Institute for Integrative Systems Biology (I(2)SysBio), Paterna, Valencia, Spain; Robert Boyle Institut e.V., Jena, Germany
| | - Sarah Hahnke
- Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Bioengineering, Potsdam, Germany
| | | | - Michael Klocke
- Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Bioengineering, Potsdam, Germany
| | | | - Patrice Ramm
- Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Bioengineering, Potsdam, Germany
| | | | | | - Manuel Porcar
- Institute for Integrative Systems Biology (I(2)SysBio), Paterna, Valencia, Spain; Darwin Bioprospecting Excellence, S.L. Parc Cientific Universitat de Valencia, Paterna, Valencia, Spain.
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21
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Alexandropoulou M, Antonopoulou G, Lyberatos G. A novel approach of modeling continuous dark hydrogen fermentation. BIORESOURCE TECHNOLOGY 2018; 250:784-792. [PMID: 29245129 DOI: 10.1016/j.biortech.2017.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/01/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
In this study a novel modeling approach for describing fermentative hydrogen production in a continuous stirred tank reactor (CSTR) was developed, using the Aquasim modeling platform. This model accounts for the key metabolic reactions taking place in a fermentative hydrogen producing reactor, using fixed stoichiometry but different reaction rates. Biomass yields are determined based on bioenergetics. The model is capable of describing very well the variation in the distribution of metabolic products for a wide range of hydraulic retention times (HRT). The modeling approach is demonstrated using the experimental data obtained from a CSTR, fed with food industry waste (FIW), operating at different HRTs. The kinetic parameters were estimated through fitting to the experimental results. Hydrogen and total biogas production rates were predicted very well by the model, validating the basic assumptions regarding the implicated stoichiometric biochemical reactions and their kinetic rates.
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Affiliation(s)
- Maria Alexandropoulou
- Institute of Chemical Engineering Sciences, Stadiou, Platani, Patras GR 26504, Greece; School of Chemical Engineering, National Technical University of Athens, GR 15780 Athens, Greece
| | - Georgia Antonopoulou
- Institute of Chemical Engineering Sciences, Stadiou, Platani, Patras GR 26504, Greece
| | - Gerasimos Lyberatos
- Institute of Chemical Engineering Sciences, Stadiou, Platani, Patras GR 26504, Greece; School of Chemical Engineering, National Technical University of Athens, GR 15780 Athens, Greece.
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22
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Braguglia CM, Gallipoli A, Gianico A, Pagliaccia P. Anaerobic bioconversion of food waste into energy: A critical review. BIORESOURCE TECHNOLOGY 2018; 248:37-56. [PMID: 28697976 DOI: 10.1016/j.biortech.2017.06.145] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 06/23/2017] [Accepted: 06/24/2017] [Indexed: 05/24/2023]
Affiliation(s)
- Camilla M Braguglia
- Istituto di Ricerca sulle Acque (IRSA-CNR), Area della Ricerca RM1, Via Salaria km 29,300, 00015 Monterotondo, Italy.
| | - Agata Gallipoli
- Istituto di Ricerca sulle Acque (IRSA-CNR), Area della Ricerca RM1, Via Salaria km 29,300, 00015 Monterotondo, Italy
| | - Andrea Gianico
- Istituto di Ricerca sulle Acque (IRSA-CNR), Area della Ricerca RM1, Via Salaria km 29,300, 00015 Monterotondo, Italy
| | - Pamela Pagliaccia
- Istituto di Ricerca sulle Acque (IRSA-CNR), Area della Ricerca RM1, Via Salaria km 29,300, 00015 Monterotondo, Italy
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23
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Algapani DE, Qiao W, di Pumpo F, Bianchi D, Wandera SM, Adani F, Dong R. Long-term bio-H 2 and bio-CH 4 production from food waste in a continuous two-stage system: Energy efficiency and conversion pathways. BIORESOURCE TECHNOLOGY 2018; 248:204-213. [PMID: 28596077 DOI: 10.1016/j.biortech.2017.05.164] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 05/25/2017] [Accepted: 05/26/2017] [Indexed: 06/07/2023]
Abstract
Anaerobic digestion is a well-established technology for treating organic waste, but it is still under challenge for food waste due to process stability problems. In this work, continuous H2 and CH4 production from canteen food waste (FW) in a two-stage system were successfully established by optimizing process parameters. The optimal hydraulic retention time was 5d for H2 and 15d for CH4. Overall, around 59% of the total COD in FW was converted into H2 (4%) and into CH4 (55%). The fluctuations of FW characteristics did not significantly affect process performance. From the energy point view, the H2 reactor contributed much less than the methane reactor to total energy balance, but it played a key role in maintaining the stability of anaerobic treatment of food waste. Microbial characterization indicated that methane formation was through syntrophic acetate oxidation combined with hydrogenotrophic methanogenesis pathway.
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Affiliation(s)
- Dalal E Algapani
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; College of Agricultural Technology and Fish Science, Al-Neelain University, Khartoum, Sudan
| | - Wei Qiao
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China.
| | - Francesca di Pumpo
- Gruppo Ricicla - DiSAA - University of Milan, Via Celoria 2, 20133 Milano, Italy
| | - David Bianchi
- Gruppo Ricicla - DiSAA - University of Milan, Via Celoria 2, 20133 Milano, Italy
| | - Simon M Wandera
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Fabrizio Adani
- Gruppo Ricicla - DiSAA - University of Milan, Via Celoria 2, 20133 Milano, Italy
| | - Renjie Dong
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China
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24
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Algapani DE, Wang J, Qiao W, Su M, Goglio A, Wandera SM, Jiang M, Pan X, Adani F, Dong R. Improving methane production and anaerobic digestion stability of food waste by extracting lipids and mixing it with sewage sludge. BIORESOURCE TECHNOLOGY 2017; 244:996-1005. [PMID: 28847110 DOI: 10.1016/j.biortech.2017.08.087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/10/2017] [Accepted: 08/14/2017] [Indexed: 06/07/2023]
Abstract
Anaerobic digestion (AD) of FW shows instability due to both the presence of high lipids and accumulation of volatile fatty acids. In this study, AD of food waste (FW) was optimized by removing lipids (LRFW) and by co-digestion with sewage sludge (1:1w/w on dry matter). The results obtained showed that lipids extraction increased FW methane yield from 400 to 418mL-gVSadded-1 under mesophilic conditions (35°C) and from 426 to 531mL-gVSadded-1 in thermophilic conditions (55°C). Two degradation phases (k1 and k2) described FW and LRFW degradation. In the thermophilic, LRFW-k1 (0.1591d-1) was slightly higher than that of FW (k1 of 0.1543d-1) and in the second stage FW-k2 of 0.0552d-1 was higher than that of LRFW (k2 of 0.0117d-1). The majority of LRFW was degraded in the first stage. FW and sewage sludge co-digestion reduced VFA accumulation, preventing media acidification and improving process stability.
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Affiliation(s)
- Dalal E Algapani
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Jing Wang
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Wei Qiao
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China.
| | - Min Su
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Andrea Goglio
- Gruppo Ricicla - DiSAA - University of Milan, via Celoria 2, 20133 Milano, Italy
| | - Simon M Wandera
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Mengmeng Jiang
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Xiang Pan
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Fabrizio Adani
- Gruppo Ricicla - DiSAA - University of Milan, via Celoria 2, 20133 Milano, Italy
| | - Renjie Dong
- Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China
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Ramos LR, Silva EL. Continuous Hydrogen Production from Agricultural Wastewaters at Thermophilic and Hyperthermophilic Temperatures. Appl Biochem Biotechnol 2016; 182:846-869. [DOI: 10.1007/s12010-016-2366-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 12/12/2016] [Indexed: 01/20/2023]
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26
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Kumar G, Mudhoo A, Sivagurunathan P, Nagarajan D, Ghimire A, Lay CH, Lin CY, Lee DJ, Chang JS. Recent insights into the cell immobilization technology applied for dark fermentative hydrogen production. BIORESOURCE TECHNOLOGY 2016; 219:725-737. [PMID: 27561626 DOI: 10.1016/j.biortech.2016.08.065] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 08/14/2016] [Accepted: 08/16/2016] [Indexed: 05/07/2023]
Abstract
The contribution and insights of the immobilization technology in the recent years with regards to the generation of (bio)hydrogen via dark fermentation have been reviewed. The types of immobilization practices, such as entrapment, encapsulation and adsorption, are discussed. Materials and carriers used for cell immobilization are also comprehensively surveyed. New development of nano-based immobilization and nano-materials has been highlighted pertaining to the specific subject of this review. The microorganisms and the type of carbon sources applied in the dark hydrogen fermentation are also discussed and summarized. In addition, the essential components of process operation and reactor configuration using immobilized microbial cultures in the design of varieties of bioreactors (such as fixed bed reactor, CSTR and UASB) are spotlighted. Finally, suggestions and future directions of this field are provided to assist the development of efficient, economical and sustainable hydrogen production technologies.
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Affiliation(s)
- Gopalakrishnan Kumar
- Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environmental and Labor Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Ackmez Mudhoo
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Mauritius, Reduit 80837, Mauritius
| | - Periyasamy Sivagurunathan
- Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Dillirani Nagarajan
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, Taiwan; Research Center for Energy Technology and Strategy, National Cheng-Kung University, Tainan, Taiwan
| | - Anish Ghimire
- Department of Environmental Science and Engineering, Kathmandu University, P.O. Box 6250, Kathmandu, Nepal
| | - Chyi-How Lay
- Green Energy Development Centre (GEDC), Feng Chia University, Taichung, Taiwan
| | - Chiu-Yue Lin
- Green Energy Development Centre (GEDC), Feng Chia University, Taichung, Taiwan
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, Taiwan; Research Center for Energy Technology and Strategy, National Cheng-Kung University, Tainan, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.
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