1
|
Feng L, Os Andersen T, Heldal Hagen L, Bilgic B, Jarle Horn S. Bioaugmentation by enriched hydrogenotrophic methanogens into trickle bed reactors for H 2/CO 2 conversion. BIORESOURCE TECHNOLOGY 2024; 408:131225. [PMID: 39111397 DOI: 10.1016/j.biortech.2024.131225] [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: 04/04/2024] [Revised: 08/03/2024] [Accepted: 08/04/2024] [Indexed: 08/11/2024]
Abstract
Biomethanation represents a promising approach for biomethane production, with biofilm-based processes like trickle bed reactors (TBRs) being among the most efficient solutions. However, maintaining stable performance can be challenging, and both pure and mixed culture approaches have been applied to address this. In this study, inocula enriched with hydrogenotrophic methanogens were introduced to to TBRs as bioaugmentation strategy to assess their impacts on the process performance and microbial community dynamics. Metagenomic analysis revealed a metagenome-assembled genome belonging to the hydrogenotrophic genus Methanobacterium, which became dominant during enrichment and successfully colonized the TBR biofilm after bioaugmentation. The TBRs achieved a biogas production with > 96 % methane. The bioaugmented reactor consumed additional H2. This may be due to microbial species utilizing CO2 and H2 via various CO2 reduction pathways. Overall, implementing bioaugmentation in TBRs showed potential for establishing targeted species, although challenges remain in managing H2 consumption and optimizing microbial interactions.
Collapse
Affiliation(s)
- Lu Feng
- Norwegian Institute of Bioeconomy Research (NIBIO), P.O. Box 115, 1431 Ås, Norway.
| | - Thea Os Andersen
- Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| | - Live Heldal Hagen
- Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| | - Begum Bilgic
- Norwegian Institute of Bioeconomy Research (NIBIO), P.O. Box 115, 1431 Ås, Norway; Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| | - Svein Jarle Horn
- Norwegian Institute of Bioeconomy Research (NIBIO), P.O. Box 115, 1431 Ås, Norway; Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| |
Collapse
|
2
|
Mahieux M, Aemig Q, Richard C, Delgenès JP, Juge M, Trably E, Escudié R. Improved organic matter biodegradation through pulsed H 2 injections during in situ biomethanation. BIORESOURCE TECHNOLOGY 2024; 407:131101. [PMID: 38996849 DOI: 10.1016/j.biortech.2024.131101] [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: 05/28/2024] [Revised: 07/01/2024] [Accepted: 07/08/2024] [Indexed: 07/14/2024]
Abstract
During in situ biomethanation, microbial communities can convert complex Organic Matter (OM) and H2 into CH4. OM biodegradation was compared between Anaerobic Digestion (AD) and in situ biomethanation, in semi-continuous processes, using two inocula from the digester (D) and the post-digester (PoD) of an AD plant. The impact of H2 on OM degradation was assessed using a fractionation method. Operational parameters included 20 days of hydraulic retention time and 1.5 gVS.L-1.d-1 of organic loading rate. During in situ biomethanation, 485 NmL of H2 were injected for each feeding (3 times a week). Maximum organic COD removal was 0.6 gCOD in AD control and at least 1.6 gCOD for in situ biomethanation. Therefore, COD removal was 2.5 times higher with H2 injections. These results bring out the potential of H2 injections during AD, not only for CO2 consumption but also for better OM degradation.
Collapse
Affiliation(s)
- M Mahieux
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France; ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - Q Aemig
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - C Richard
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - J-P Delgenès
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France
| | - M Juge
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - E Trably
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France
| | - R Escudié
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France.
| |
Collapse
|
3
|
Zhu X, Yellezuome D, Wang Z, Liu X, Liu R. Comprehensive insights into the effects of acidogenic off-gas utilization on successive biogas production, microbial community structure and metabolite distribution during two-stage anaerobic digestion. WATER RESEARCH 2024; 258:121740. [PMID: 38749185 DOI: 10.1016/j.watres.2024.121740] [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: 10/09/2023] [Revised: 12/26/2023] [Accepted: 05/04/2024] [Indexed: 06/16/2024]
Abstract
Although two-stage anaerobic digestion (TSAD) technology has been investigated, the mechanisms regarding the impact of acidogenic off-gas (AOG) on successive methane production have not been well addressed. In this study, a novel TSAD system was designed. Food waste, as the main substrate, was co-digested with chicken manure and corn straw. The acidogenic gas beyond atmospheric pressure was introduced into the bottom of the methanogenesis reactor through a stainless steel diffuser. Results showed the addition of AOG increased the methane yield from 435.2 to 597.1 mL/g VSin in successive methanogenesis stage, improved by 37.2 %, and increased the energy yield from 9.0 to 11.3 kJ/g VSsubstrate. However, the theoretical contribution of hydrogenotrophic methanogenesis using H2 contained in AOG was only 15.2 % of the increased methane yield. After the addition of AOG, the decreased levels of ammonia nitrogen and butyrate indicate that the stability of the AD system was improved. The electron transfer system and co-enzyme F420 activity were enhanced; however, the decrease in acetate kinase activity indicates aceticlastic methanogenesis may have been weakened. The microbial diversity and species richness were improved by the added AOG. Methanosarcina was more competitive than Methanothermobacter, enhancing the syntrophic effect. The relative abundance of protein degradation bacteria norank_f_Anaerolineaceae and lipid degradation bacteria Syntrophomonas was increased. Metabolite analysis confirmed that the addition of AOG promoted amino acid metabolism, the biosynthesis of other secondary metabolism and lipid metabolism. The improved degradation of recalcitrant organic components (lipids and proteins) in food waste was responsible for the increased methane yield. This study provides an in-depth understanding of the impact of AOG utilization on successive methane production and has practical implications for the treatment of food waste.
Collapse
Affiliation(s)
- Xianpu Zhu
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China; Shanghai Yangtze River Delta Eco-environmental Change and Management Observation and Research Station, Ministry of Science and Technology, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Dominic Yellezuome
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China; Shanghai Yangtze River Delta Eco-environmental Change and Management Observation and Research Station, Ministry of Science and Technology, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Zengzhen Wang
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China; Shanghai Yangtze River Delta Eco-environmental Change and Management Observation and Research Station, Ministry of Science and Technology, 800 Dongchuan Road, Shanghai 200240, PR China; China Three Gorges Investment Management Co., Ltd., Shanghai 200120, PR China
| | - Xuwei Liu
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China; Shanghai Yangtze River Delta Eco-environmental Change and Management Observation and Research Station, Ministry of Science and Technology, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Ronghou Liu
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China; Shanghai Yangtze River Delta Eco-environmental Change and Management Observation and Research Station, Ministry of Science and Technology, 800 Dongchuan Road, Shanghai 200240, PR China.
| |
Collapse
|
4
|
Khomyakova MA, Merkel AY, Slobodkin AI. Anaerobaca lacustris gen. nov., sp. nov., an obligately anaerobic planctomycete of the widespread SG8-4 group, isolated from a coastal lake, and proposal of Anaerobacaceae fam. nov. Syst Appl Microbiol 2024; 47:126522. [PMID: 38852331 DOI: 10.1016/j.syapm.2024.126522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/31/2024] [Accepted: 06/03/2024] [Indexed: 06/11/2024]
Abstract
One of the numerous and widespread lineages of planctomycetes is the hitherto uncultured SG8-4 group inhabiting anoxic environments. A novel anaerobic, mesophilic, alkalitolerant, chemoorganotrophic bacterium (strain M17dextrT) was isolated from anaerobic sediment of a coastal lake (Taman Peninsula, Russia). The cell were mainly non-motile cocci, 0.3 to 1.0 µm in diameter forming chains or aggregates. The cells had a Gram-negative cell wall and divided by binary fission. The temperature range for growth was 20-37 0C (optimum at 30 0C). The pH range for growth was 6.5-10.0, with an optimum at pH 8.0-8.5. Strain M17dextrT fermented mono-, di- and polysaccharides (starch, xanthan gum, dextran, N-acetylglucosamine), but did not utilized proteinaceous compounds. Major cellular fatty acids were C16:0 and C18:0. The genome of strain M17dextrT had a size of 5.7 Mb with a G + C content of 62.49 %. The genome contained 345 CAZyme genes. The closest cultured phylogenetic relatives of strain M17dextrT were members of the order Sedimentisphaerales, class Phycisphaerae. Among characterized planctomycetes, the highest 16S rRNA gene sequence similarity (88.3 %) was observed with Anaerohalosphaera lusitana. According to phylogenomic analysis strain M17dextrT together with many uncultured representatives of Sedimentisphaerales forms a separate family-level lineage. We propose to assign strain M17dextrT to a novel genus and species, Anaerobaca lacustris gen. nov., sp. nov.; the type strain is M17dextrT (=VKM B-3571 T = DSM 113417 T = JCM 39238 T = KCTC 25381 T = UQM 41474 T). This genus is placed in a novel family, Anaerobacaceae fam. nov. within the order Sedimentisphaerales.
Collapse
Affiliation(s)
- M A Khomyakova
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, Leninskiy Prospect, 33, bld. 2, 119071, Moscow, Russia.
| | - A Y Merkel
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, Leninskiy Prospect, 33, bld. 2, 119071, Moscow, Russia
| | - A I Slobodkin
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, Leninskiy Prospect, 33, bld. 2, 119071, Moscow, Russia
| |
Collapse
|
5
|
Mahieux M, Richard C, Aemig Q, Delgenès JP, Juge M, Trably E, Escudié R. Archaeal community composition as key driver of H2 consumption rates at the start-up of the biomethanation process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172922. [PMID: 38701927 DOI: 10.1016/j.scitotenv.2024.172922] [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: 01/29/2024] [Revised: 04/03/2024] [Accepted: 04/29/2024] [Indexed: 05/05/2024]
Abstract
The performance of hydrogen consumption by various inocula derived from mesophilic anaerobic digestion plants was evaluated under ex situ biomethanation. A panel of 11 mesophilic inocula was operated at a concentration of 15 gVS.L-1 at a temperature of 35 °C in batch system with two successive injections of H2:CO2 (4:1 mol:mol). Hydrogen consumption and methane production rates were monitored from 44 h to 72 h. Hydrogen consumption kinetics varies significantly based on the inoculum origin, with no accumulation of volatile fatty acids. Microbial community analyses revealed that microbial indicators such as the increase in Methanosarcina sp. abundance and the increase of the Archaea/Bacteria ratio were associated to high initial hydrogen consumption rates. The improvement in the hydrogen consumption rate between the two injections was correlated with the enrichment in hydrogenotrophic methanogens. This work provides new insights into the early response of microbial communities to hydrogen injection and on the microbial structures that may favor their adaptation to the biomethanation process.
Collapse
Affiliation(s)
- M Mahieux
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France; ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - C Richard
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - Q Aemig
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - J-P Delgenès
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France
| | - M Juge
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - E Trably
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France
| | - R Escudié
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France.
| |
Collapse
|
6
|
Lee ES, Park SY, Kim CG. Comparison of anaerobic digestion of starch- and petro-based bioplastic under hydrogen-rich conditions. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 175:133-145. [PMID: 38194798 DOI: 10.1016/j.wasman.2023.12.050] [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: 08/21/2023] [Revised: 11/30/2023] [Accepted: 12/27/2023] [Indexed: 01/11/2024]
Abstract
To identify an economically viable waste management system for bioplastics, thermoplastic starch (TPS) and poly(butylene adipate-co-terephthalate) (PBAT) were anaerobically digested under hydrogen (H2)/carbon dioxide (CO2) and nitrogen (N2) gas-purged conditions to compare methane (CH4) production and biodegradation. Regardless of the type of bioplastics, CH4 production was consistently higher with H2/CO2 than with N2. The highest amount of CH4 was produced at 307.74 mL CH4/g volatile solids when TPS digested with H2/CO2. A stepwise increased in CH4 yield was observed, with a nominal initial increment followed by accelerated methanogenesis conversion as H2 was depleted. This may be attributed to a substantial shift in the microbial structure from hydrogenotrophic methanogen (Methanobacteriales and Methanomicrobiales) to heterotrophs (Spirochaetia). In contrast, no significant change was observed with PBAT, regardless of the type of purged gas. TPS was broken down into numerous derivatives, including volatile fatty acids. TPS produced more byproducts with H2/CO2 (i.e., 430) than with N2 (i.e., 320). In contrast, differential scanning calorimetry analysis on PBAT revealed an increase in crystallinity from 10.20 % to 12.31 % and 11.36 % in the H2/CO2- and N2-purged conditions, respectively, after 65 days of testing. PBAT surface modifications were characterized via Fourier transform infrared spectroscopy and scanning electron microscopy. The results suggest that the addition of H2/CO2 can enhance the CH4 yield and increase the breakdown rate of TPS more than that of PBAT. This study provides novel insights into the CH4 production potential of two bioplastics with different biodegradabilities in H2/CO2-mediated anaerobic digestion systems.
Collapse
Affiliation(s)
- Eun Seo Lee
- Program in Environmental and Polymer Engineering, INHA University, Incheon 22212, Republic of Korea
| | - Seon Yeong Park
- Institute of Environmental Research, INHA University, Incheon 22212, Republic of Korea
| | - Chang Gyun Kim
- Program in Environmental and Polymer Engineering, INHA University, Incheon 22212, Republic of Korea; Department of Environmental Engineering, INHA University, Incheon 22212, Republic of Korea.
| |
Collapse
|
7
|
Mo R, Guo W, Batstone D, Makinia J, Li Y. Modifications to the anaerobic digestion model no. 1 (ADM1) for enhanced understanding and application of the anaerobic treatment processes - A comprehensive review. WATER RESEARCH 2023; 244:120504. [PMID: 37634455 DOI: 10.1016/j.watres.2023.120504] [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: 05/25/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 08/29/2023]
Abstract
Anaerobic digestion (AD) is a promising method for the recovery of resources and energy from organic wastes. Correspondingly, AD modelling has also been developed in recent years. The International Water Association (IWA) Anaerobic Digestion Model No. 1 (ADM1) is currently the most commonly used structured AD model. However, as substrates become more complex and our understanding of the AD mechanism grows, both systematic and specific modifications have been applied to the ADM1. Modified models have provided a diverse range of application besides AD processes, such as fermentation and biogas upgrading processes. This paper reviews research on the modification of the ADM1, with a particular focus on processes, kinetics, stoichiometry and parameters, which are the major elements of the model. The paper begins with a brief introduction to the ADM1, followed by a summary of modifications, including extensions to the model structure, modifications to kinetics (including inhibition functions) and stoichiometry, as well as simplifications to the model. The paper also covers kinetic parameter estimation and validation of the model, as well as practical applications of the model to a variety of scenarios. The review highlights the need for improvements in simulating AD and biogas upgrading processes, as well as the lack of full-scale applications to other substrates besides sludge (such as food waste and agricultural waste). Future research directions are suggested for model development based on detailed understanding of the anaerobic treatment mechanisms, and the need to recover of valuable products.
Collapse
Affiliation(s)
- Rongrong Mo
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Wenjie Guo
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Damien Batstone
- Australian Centre for Water and Environmental Biotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jacek Makinia
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza Street 11/12, Gdansk 80-233, Poland
| | - Yongmei Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| |
Collapse
|
8
|
Aboudi K, Greses S, González-Fernández C. Hydraulic Retention Time as an Operational Tool for the Production of Short-Chain Carboxylates via Anaerobic Fermentation of Carbohydrate-Rich Waste. Molecules 2023; 28:6635. [PMID: 37764411 PMCID: PMC10537262 DOI: 10.3390/molecules28186635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/29/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
The carboxylate platform is a sustainable and cost-effective way to valorize wastes into biochemicals that replace those of fossil origin. Short-chain fatty acids (SCFAs) are intermediates generated during anaerobic fermentation (AF) and are considered high-value-added biochemicals among carboxylates. This investigation aimed to produce SCFAs through the AF of sugar beet molasses at 25 °C and semi-continuous feeding mode in completely stirred tank reactors. A particular focus was devoted to the role of hydraulic retention time (HRT) variation in SCFAs production and distribution profile. The highest SCFAs concentration (44.1 ± 2.3 gCOD/L) was reached at the HRT of 30 days. Caproic acid accounted for 32.5-35.5% (COD-concentration basis) at the long HRTs of 20 and 30 days due to the carbon chain elongation of shorter carboxylic acids. The findings of this study proved that HRT could be used to steer the anaerobic process toward the targeted SCFAs for specific uses. Furthermore, the successful operation at low-temperature conditions (i.e., 25 °C) makes the process economically promising.
Collapse
Affiliation(s)
- Kaoutar Aboudi
- Biotechnological Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra 3, 28935 Madrid, Spain
| | - Silvia Greses
- Biotechnological Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra 3, 28935 Madrid, Spain
| | - Cristina González-Fernández
- Biotechnological Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra 3, 28935 Madrid, Spain
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47002 Valladolid, Spain
- Institute of Sustainable Processes, Dr. Mergelina, s/n, 47002 Valladolid, Spain
| |
Collapse
|
9
|
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.
Collapse
|
10
|
Ai Z, Zheng S, Liu D, Wang S, Wang H, Huang W, Lei Z, Zhang Z, Yang F, Huang W. Zero-valent iron is not always effective in enhancing anaerobic digestion performance. CHEMOSPHERE 2022; 306:135544. [PMID: 35779688 DOI: 10.1016/j.chemosphere.2022.135544] [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: 02/25/2022] [Revised: 06/23/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Liquid nitrogen was employed as a low-temperature medium to activate zero-valent iron (ZVI) powder in an attempt to strengthen its enhancement effect on anaerobic digestion (AD) of swine manure (SM). Surprisingly, it was found that both pristine ZVI and liquid nitrogen-pretreated ZVI (LZVI) did not significantly improve the AD performance or change the archaeal community structure. It was hypothesized that ZVI might not be effective at stress-free environment like in these digesters. To confirm this, an additional set of AD experiments were performed at high ammonia stress (about 4000 mg/L), results showed that ZVI and LZVI greatly alleviated ammonia inhibition and increased the CH4 yield by 11.6% and 28.2%, respectively. Apparently, ZVI mainly affected AD systems by changing the metabolism pathways and enhancing the microbial activity to overcome process inhibition, and pretreatment of liquid nitrogen could significantly accelerate the dissolution of ZVI and improve its utilization efficiency, contributing to a greater extend of process recovery and improvement.
Collapse
Affiliation(s)
- Ziyin Ai
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Avenue, Meilan District, Haikou, 570228, China
| | - Sichao Zheng
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Avenue, Meilan District, Haikou, 570228, China
| | - Dan Liu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Avenue, Meilan District, Haikou, 570228, China
| | - Siyuan Wang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Avenue, Meilan District, Haikou, 570228, China
| | - Hongqin Wang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Avenue, Meilan District, Haikou, 570228, China
| | - Wenli Huang
- MOE Key Laboratory of Pollution Process and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, No. 94 Weijin Road, Nankai District, Tianjin, 300071, China
| | - Zhongfang Lei
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan
| | - Zhenya Zhang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan
| | - Fei Yang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Avenue, Meilan District, Haikou, 570228, China
| | - Weiwei Huang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, College of Ecology and Environment, Hainan University, 58 Renmin Avenue, Meilan District, Haikou, 570228, China.
| |
Collapse
|
11
|
Individual Phenolic Acids in Distillery Stillage Inhibit Its Biomethanization. ENERGIES 2022. [DOI: 10.3390/en15155377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Polyphenols that are abundant in various organic wastes can inhibit anaerobic degradation of these wastes. This study investigated the effect of the concentration of individual phenolic acids (p-OH benzoic, vanillic, ferulic, sinapic, syringic, and p-coumaric acids) and their mixture on the methane potential of distillery stillage. An increase in phenolic acid concentration adversely affected biogas production and composition, as well as the methane-production rate. The inhibition constants for methane production were 0.5–1.0 g/L of individual phenolic acids and 1.5 g/L of the mixture of these acids. At lower concentrations, the phenolic acids were utilized as a carbon source, but the process was impeded when their concentrations exceeded the threshold value, due to their negative effect on microbial growth. When distillery stillage was spiked with vanillic acid, two-phase methane production was observed. Spiking distillery stillage with vanillic, p-coumaric, syringic, or ferulic acids affected anaerobic digestion the most; 2 g/L of these acids completely inhibited methane production. With 4.0 g/L of all individual phenolic acids, no methane production was observed. As the concentration of these phenolic acids increased from 0.5 to 4.0 g/L, the abundance of methanogenic Archaea, in which acetoclastic methanogens predominated, decreased by about 30 times.
Collapse
|
12
|
Banu J R, Varjani S, P S, Tyagi VK, Gunasekaran M. Breakthrough in hydrolysis of waste biomass by physico-chemical pretreatment processes for efficient anaerobic digestion. CHEMOSPHERE 2022; 294:133617. [PMID: 35041820 DOI: 10.1016/j.chemosphere.2022.133617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/19/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Anaerobic digestion (AD) is the most comprehended process to stabilise the waste biomass efficiently and to obtain bioenergy. The AD starts with the hydrolysis process, where the major liability is the action of inhibitors during the hydrolysis process. The biomass pretreatment preceding anaerobic digestion is obligatory to improve feedstock biodegradability for enhanced biogas generation. It can be prevailed by the application of various pretreatment processes. This review explains the major inhibiting compounds and their formation during hydrolysis that affect the efficiency of anaerobic digestion and the benefits of the physico-chemical pretreatment (PCP) method for enhancing hydrolysis in the digestion of waste biomass. The synergistic effect of PCP on macromolecular release, liquefaction and biodegradability were presented. The feasibility of the pretreatment process was evaluated in terms of energy and cost assessment for pilot scale implementation. The outcome of this review reveals that the physico-chemical process is one of the best pretreatment methods to enhance anaerobic digestion by optimising various parameters and increasing the solubilization by about 90%. The thermochemical pretreatment at lower temperature (<100) increases the net energy yield. The solubilization of waste biomass in terms of macromolecular release and liquefaction cannot describe the pretreatment potential. The effectiveness of pretreatment was evaluated by the substrate pre-treatment followed by anaerobic digestibility of pretreated substrate.
Collapse
Affiliation(s)
- Rajesh Banu J
- Department of Life Sciences, Central University of Tamil Nadu, Neelakudi, Thiruvarur, 610005, India
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, Gujarat, 382010, India
| | - Sivashanmugam P
- Department of Chemical Engineering, National Institute of Technology, Tiruchirapalli, Tamil Nadu, India
| | - Vinay Kumar Tyagi
- Environmental BioTechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
| | - M Gunasekaran
- Department of Physics, Anna University Regional Campus, Tirunelveli, Tamil Nadu, 627007, India.
| |
Collapse
|
13
|
Zhao S, Chen W, Luo W, Fang H, Lv H, Liu R, Niu Q. Anaerobic co-digestion of chicken manure and cardboard waste: Focusing on methane production, microbial community analysis and energy evaluation. BIORESOURCE TECHNOLOGY 2021; 321:124429. [PMID: 33285504 DOI: 10.1016/j.biortech.2020.124429] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/15/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
This study aimed to investigate the synergistic effect and microbial community changes between chicken manure (CM) and cardboard (CB) during anaerobic co-digestion. Meanwhile, the energy balance of biogas engineering was extrapolated based on the batch tests. In batch tests, co-digestion system achieved the highest improvement (14.2%) and produced 319.62 mL CH4/gVS with a 65:35 ratio of CB: CM. More extracellular polymeric substance secretion promoted the electron transfer for acidogenesis and more hydrolase was provided with 31.6% improvement. The microbial analysis illustrated that higher acetoclastic Methanosaeta abundance was achieved, leading to 211% enhancement of acetoclastic pathway. Moreover, associated network illustrated that the higher methane production was mainly achieved through matching of hydrolytic bacteria and acidogenesis bacteria. As for energy balance, the synergistic effect increased the energy output by 38% and energy recovery to 46.4%.
Collapse
Affiliation(s)
- Shunan Zhao
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Wenhan Chen
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Wendan Luo
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Hongli Fang
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Huanyu Lv
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Qigui Niu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China.
| |
Collapse
|
14
|
Temperature and Inoculum Origin Influence the Performance of Ex-Situ Biological Hydrogen Methanation. Molecules 2020; 25:molecules25235665. [PMID: 33271799 PMCID: PMC7730501 DOI: 10.3390/molecules25235665] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/27/2020] [Accepted: 11/29/2020] [Indexed: 11/16/2022] Open
Abstract
The conversion of H2 into methane can be carried out by microorganisms in a process so-called biomethanation. In ex-situ biomethanation H2 and CO2 gas are exogenous to the system. One of the main limitations of the biomethanation process is the low gas-liquid transfer rate and solubility of H2 which are strongly influenced by the temperature. Hydrogenotrophic methanogens that are responsible for the biomethanation reaction are also very sensitive to temperature variations. The aim of this work was to evaluate the impact of temperature on batch biomethanation process in mixed culture. The performances of mesophilic and thermophilic inocula were assessed at 4 temperatures (24, 35, 55 and 65 °C). A negative impact of the low temperature (24 °C) was observed on microbial kinetics. Although methane production rate was higher at 55 and 65 °C (respectively 290 ± 55 and 309 ± 109 mL CH4/L.day for the mesophilic inoculum) than at 24 and 35 °C (respectively 156 ± 41 and 253 ± 51 mL CH4/L.day), the instability of the system substantially increased, likely because of a strong dominance of only Methanothermobacter species. Considering the maximal methane production rates and their stability all along the experiments, an optimal temperature range of 35 °C or 55 °C is recommended to operate ex-situ biomethanation process.
Collapse
|
15
|
Zhu X, Zhou P, Chen Y, Liu X, Li D. The role of endogenous and exogenous hydrogen in the microbiology of biogas production systems. World J Microbiol Biotechnol 2020; 36:79. [DOI: 10.1007/s11274-020-02856-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/15/2020] [Indexed: 01/06/2023]
|
16
|
Abstract
Since the observation of direct interspecies electron transfer (DIET) in anaerobic mixed cultures in 2010s, the topic “DIET-stimulation” has been the main route to enhance the performance of anaerobic digestion (AD) under harsh conditions, such as high organic loading rate (OLR) and the toxicants’ presence. In this review article, we tried to answer three main questions: (i) What are the merits and strategies for DIET stimulation? (ii) What are the consequences of stimulation? (iii) What is the mechanism of action behind the impact of this stimulation? Therefore, we introduced DIET history and recent relevant findings with a focus on the theoretical advantages. Then, we reviewed the most recent articles by categorizing how DIET reaction was stimulated by adding conductive material (CM) and/or applying external voltage (EV). The emphasis was made on the enhanced performance (yield and/or production rate), CM type, applied EV, and mechanism of action for each stimulation strategy. In addition, we explained DIET-caused changes in microbial community structure. Finally, future perspectives and practical limitations/chances were explored in detail. We expect this review article will provide a better understanding for DIET pathway in AD and encourage further research development in a right direction.
Collapse
|
17
|
Zhou J, You X, Niu B, Yang X, Gong L, Zhou Y, Wang J, Zhang H. Enhancement of methanogenic activity in anaerobic digestion of high solids sludge by nano zero-valent iron. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 703:135532. [PMID: 31759718 DOI: 10.1016/j.scitotenv.2019.135532] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/13/2019] [Accepted: 11/13/2019] [Indexed: 06/10/2023]
Abstract
This study evaluated the effects of nano zero-valent iron (NZVI, 50 nm) on anaerobic digestion of high solids sludge (10 ± 0.5%). Compared to the blank group without NZVI, the group with NZVI at all levels (10, 20 and 30 mM) played a driving role in methane production. The maximal methane production was increased by 37.5% in the group of 30 mM NZVI. The dynamic changes of hydrogen content and VFAs showed that rapid hydrogen evolutional corrosion of NZVI made lower hydrogen partial pressure in the later stage, which was more conducive to conversion of propionic acid. The microscopic analysis indicated that NZVI could flocculate and adsorb on the extracellular polymeric substances (EPS) around the anaerobic microorganisms, protecting most active microbial cell membrane from contact damage. On the other hand, some decaying microbial cells membrane could be destroyed by NZVI and intracellular substances would be released due to the reduction of EPS.
Collapse
Affiliation(s)
- Jun Zhou
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China
| | - Xiaogang You
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China
| | - Baowei Niu
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China
| | - Xiaoqi Yang
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China
| | - Lei Gong
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China.
| | - Ying Zhou
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China
| | - Jin Wang
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China
| | - Haonan Zhang
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, 53, Zhengzhou Road, Qingdao, Shandong Province 266042, PR China
| |
Collapse
|
18
|
Methanogenic activity and microbial communities characteristics in dry and wet anaerobic digestion sludges from swine manure. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.107390] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
19
|
Montecchio D, Astals S, Di Castro V, Gallipoli A, Gianico A, Pagliaccia P, Piemonte V, Rossetti S, Tonanzi B, Braguglia CM. Anaerobic co-digestion of food waste and waste activated sludge: ADM1 modelling and microbial analysis to gain insights into the two substrates' synergistic effects. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 97:27-37. [PMID: 31447024 DOI: 10.1016/j.wasman.2019.07.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 07/12/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
The reasons for the acidification problem affecting Food Waste (FW) anaerobic digestion were explored, combining the outcomes of microbiological data (FISH and CARD-FISH) and process modelling, based on the Anaerobic Digestion Model n°1 (ADM1). Long term semi continuous experiments were carried out, both with sole FW and with Waste Activated Sludge (WAS) as a co-substrate, at varying operational conditions (0.8-2.2 g VS L-1 d-1) and FW / WAS ratios. Acidification was observed along FW mono-digestion, making it necessary to buffer the digesters; ADM1 modelling and experimental results suggested that this phenomenon was due to the methanogenic activity decline, most likely related to a deficiency in trace elements. WAS addition, even at proportions as low as 10% of the organic load, settled the acidification issue; this ability was related to the promotion of the methanogenic activity and the consequent enhancement of acetate consumption, rather than to WAS buffering capacity. The ability of the ADM1 to model processes affected by low microbial activity, such as FW mono-digestion, was also assessed. It was observed that the ADM1 was only adequate for digestions with a high activity level for both bacteria and methanogens (FISH/CARD-FISH ratio preferably >0.8) and, under these conditions, the model was able to correctly predict the relative abundance of both microbial populations, extrapolated from FISH analysis.
Collapse
Affiliation(s)
- Daniele Montecchio
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy.
| | - Sergi Astals
- Advanced Water Management Centre, The University of Queensland, Brisbane, QLD 4072, Australia; Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08028 Barcelona, Spain
| | - Vasco Di Castro
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy; Department of Engineering, University "Campus Bio-medico" of Rome, 00128 Roma, Italy
| | - Agata Gallipoli
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy
| | - Andrea Gianico
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy
| | - Pamela Pagliaccia
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy
| | - Vincenzo Piemonte
- Department of Engineering, University "Campus Bio-medico" of Rome, 00128 Roma, Italy
| | - Simona Rossetti
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy
| | - Barbara Tonanzi
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy
| | - Camilla M Braguglia
- Istituto di Ricerca sulle Acque-CNR, Area della Ricerca RM1, 00015 Monterotondo (Roma), Italy
| |
Collapse
|