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1. Global methane emissions from coal mining to continue growing even with declining coal production

Author:
Kholod, Nazar; Evans, Meredydd; Pilcher, Raymond C.; Roshchanka, Volha; Ruiz, Felicia; Coté, Michael; Collings, Ron
Source:
Journal of cleaner production 2020 v.256 pp. 120489
ISSN:
0959-6526
Subject:
methane production,   etc   ; coal; emissions; emissions factor; mining; models;     Show all 6 Subjects
Abstract:
... This paper presents projections of global methane emissions from coal mining under different coal extraction scenarios and with increasing mining depth through 2100. The paper proposes an updated methodology for calculating fugitive emissions from coal mining, which accounts for coal extraction method, coal rank, and mining depth and uses evidence-based emissions factors. A detailed assessment sho ...
DOI:
10.1016/j.jclepro.2020.120489

2. Efficient screening of novel adsorbents for coalbed methane recovery

Author:
Xu, Mai; Deng, Shuguang
Source:
Journal of colloid and interface science 2020 v.565 pp. 131-141
ISSN:
0021-9797
Subject:
methane production,   etc   ; adsorbents; adsorption; coalbed methane; energy; methane; screening;     Show all 7 Subjects
Abstract:
... Many adsorbents with outstanding methane (CH₄)/nitrogen (N₂) separation performance are reported recently. Some may have the potential for coalbed methane (CBM) recovery to resolve the current energy crisis. However, no systematic assessment method for evaluating these adsorbents is available. This study was performed for efficient comparison and assessment of 47 novel adsorbents that are suitable ...
DOI:
10.1016/j.jcis.2020.01.008

3. Evaluation of biomethanization during co-digestion of thermally pretreated microalgae and waste activated sludge, and estimation of its kinetic parameters

Author:
Scarcelli, Priscila Guenka; Serejo, Mayara Leite; Paulo, Paula Loureiro; Boncz, Marc Árpád
Source:
The Science of the total environment 2020 v.706 pp. 135745
ISSN:
0048-9697
Subject:
methane production,   etc   ; activated sludge; anaerobic digestion; biodegradability; kinetics; microalgae; models;     Show all 7 Subjects
Abstract:
... The maximum methane yield that can be obtained from anaerobic co-digestion of microalgae and waste activated sludge (WAS) mixtures, after thermal pretreatment at 65 °C during 4 h, was investigated. Furthermore, the fitting of the experimental data by five kinetic models (first-order, second-order, modified Gompertz, Logistic, and two-substrate) was evaluated. Thermal pretreatment increased the met ...
DOI:
10.1016/j.scitotenv.2019.135745

4. Overview of key operation factors and strategies for improving fermentative volatile fatty acid production and product regulation from sewage sludge

Author:
Fang, Wei; Zhang, Xuedong; Zhang, Panyue; Wan, Jijun; Guo, Hongxiao; Ghasimi, Dara S.M.; Morera, Xavier Carol; Zhang, Tao
Source:
Journal of environmental sciences (China) 2020 v.87 pp. 93-111
ISSN:
1001-0742
Subject:
methane production,   etc   ; fermentation; hydrolysis; sewage sludge; volatile fatty acids;     Show all 5 Subjects
Abstract:
... In recent years, volatile fatty acid (VFA) production through anaerobic fermentation of sewage sludge, instead of methane production, has been regarded as a high-value and promising roadmap for sludge stabilization and resource recovery. This review first presents the effects of some essential factors that influence VFA production and composition. In the second part, we present an extensive analys ...
DOI:
10.1016/j.jes.2019.05.027

5. Simultaneous H2S mitigation and methanization enhancement of chicken manure through the introduction of the micro-aeration approach

Author:
Mahdy, Ahmed; Song, Yunlong; Salama, Ali; Qiao, Wei; Dong, Renjie
Source:
Chemosphere 2020 v.253 pp. 126687
ISSN:
0045-6535
Subject:
methane production,   etc   ; air; anaerobic digestion; biogas; hydrogen sulfide; hydrolysis; poultry manure; sulfates; synergism;     Show all 9 Subjects
Abstract:
... The impact on H₂S alleviation and methane yield enhancement after submitting the anaerobic digestion of chicken manure to a finite amount of air was investigated. The largest reduction in the H₂S biogas content (58% lower) occurred when air intensity of 30 ml/g VSᵢₙ was injected into the reactors. Consequently, a maximum methane yield (335 mL-g VSᵢₙ⁻¹), which was 77% higher than the control, was c ...
DOI:
10.1016/j.chemosphere.2020.126687

6. Micron-sized silica particles in wastewater influenced the distribution of organic matters in sludge and their anaerobic degradation

Author:
Chen, Sisi; Dong, Bin; Yang, Dianhai; Li, Ning; Dai, Xiaohu
Source:
Journal of hazardous materials 2020 v.393 pp. 122340
ISSN:
0304-3894
Subject:
methane production,   etc   ; polysaccharides; protein content; protein degradation; protein secondary structure; sewage sludge; silica; wastewater; China;     Show all 9 Subjects
Abstract:
... The influence of micron-sized silica particles on the distribution of organic matters in sludge and anaerobic degradation of macromolecular organic components (MOCs) in sludge was investigated. With the addition of micron-sized particles in the influent (VS/TS decreased gradually from 90.46 ± 0.21 % to 33.36 ± 0.17 %), the protein degradation percentage was significantly promoted while the polysac ...
DOI:
10.1016/j.jhazmat.2020.122340

7. Anaerobic co-digestion of municipal waste sludge with grease trap waste mixture: Point of process failure determination

Author:
Shakourifar, Niloofar; Krisa, David; Eskicioglu, Cigdem
Source:
Renewable energy 2020 v.154 pp. 117-127
ISSN:
0960-1481
Subject:
methane production,   etc   ; anaerobic digestion; biochar; gas production (biological); long chain fatty acids; renewable energy sources; sludge;     Show all 7 Subjects
Abstract:
... Using high-strength wastes, such as grease trap waste mixture (GTWM) from multiple commercial facilities, as a co-substrate in anaerobic digestion can contribute to a significant increase in methane production. However, challenges such as long chain fatty acids (LCFAs) accumulation, sludge flotation, washout and scum formation can lead to digester failure. In this study, the optimal operating cond ...
DOI:
10.1016/j.renene.2020.03.009

8. Effect of biogas recirculation strategy on biogas upgrading and process stability of anaerobic digestion of sewage sludge under slightly alkaline condition

Author:
Zhao, Jiamin; Hou, Tingting; Lei, Zhongfang; Shimizu, Kazuya; Zhang, Zhenya
Source:
Bioresource technology 2020 v.308 pp. 123293
ISSN:
0960-8524
Subject:
methane production,   etc   ; alkalinity; ammonia; anaerobic digestion; biogas; fatty acids; hydrogen sulfide; methane; pH; sewage sludge;     Show all 10 Subjects
Abstract:
... In this study, in-situ biogas upgrading was examined and compared in lab-scale semi-continuous anaerobic digestion (AD) systems coupled with biogas recirculation under neutral and slightly alkaline conditions. Results showed that neutral pH (~7.5) condition yielded 6–7% higher CH₄ content and 52–53% less H₂S production, while slightly alkaline condition (pH ~8.0) achieved 14–15% higher CH₄ content ...
DOI:
10.1016/j.biortech.2020.123293

9. Impact of continuous leachate recirculation during solid state anaerobic digestion of Miscanthus

Author:
Li, Chao; Tao, Yu; Fang, Jun; Li, Qiang; Lu, Wenjing
Source:
Renewable energy 2020 v.154 pp. 38-45
ISSN:
0960-1481
Subject:
methane production,   etc   ; Miscanthus; anaerobic digestion; biogas; cellulose; gas production (biological); hemicellulose; leachates; methane; microbial communities;     Show all 10 Subjects
Abstract:
... Continuous leachate recirculation was performed in a solid-state anaerobic digestion (SS-AD) in an attempt to enhance and improve the biogas (methane) production from Miscanthus sp. Furthermore, microbial community dynamics was analysed, and liaised with the process performance and stability. Results showed that the SS-AD process without leachate recirculation showed significantly higher degradati ...
DOI:
10.1016/j.renene.2020.02.104

10. Modelization of anaerobic processes during co-digestion of slowly biodegradable substrates

Author:
Rubio, J.A.; Garcia-Morales, J.L.; Romero, L.I.; Fernandez-Morales, F.J.
Source:
Chemosphere 2020 v.250 pp. 126222
ISSN:
0045-6535
Subject:
methane production,   etc   ; anaerobic digestion; biodegradability; biodegradation; fermentation; hydrolysis; methanogens; total solids; wastes;     Show all 9 Subjects
Abstract:
... The influence of the soluble substrates over the anaerobic processes has been extensively investigated, but little is known about the effects of particulate substrate. The biodegradation of these substrates starts with the hydrolytic step, this process is slower than the other ones involved in the biodegradation of particulate substrates and usually becomes the rate-limiting step. This study inves ...
DOI:
10.1016/j.chemosphere.2020.126222

11. The performance evaluation and kinetics response of advanced anaerobic digestion for sewage sludge under different SRT during semi-continuous operation

Author:
Liu, Jibao; Zheng, Jiaxi; Zhang, Junya; Yu, Dawei; Wei, Yuansong
Source:
Bioresource technology 2020 v.308 pp. 123239
ISSN:
0960-8524
Subject:
methane production,   etc   ; anaerobic digestion; energy; hydrolysis; logit analysis; methane; models; sewage sludge;     Show all 8 Subjects
Abstract:
... Sludge retention time (SRT) is vital for advanced anaerobic digestion (AD) to realize energy self-sufficient. However, the criteria on reasonable SRT has not been fully understood. This study investigated the performance and kinetics response of AD under different SRT in semi-continuous AD with microwave (MW) pretreatment, according to the long-term operation and methane production during one feed ...
DOI:
10.1016/j.biortech.2020.123239

12. Optimization of bioaugmentation of the anaerobic digestion of Axonopus compressus cowgrass for the production of biomethane

Author:
Lee, Jonathan T.E.; Wang, Qingkun; Lim, Ee Yang; Liu, Zhentian; He, Jianzhong; Tong, Yen Wah
Source:
Journal of cleaner production 2020 v.258 pp. 120932
ISSN:
0959-6526
Subject:
methane production,   etc   ; Axonopus compressus; anaerobic digestion; bioaugmentation; biogas; biomass; cellulose; crystal structure; lignocellulose; methane; microorganisms;     Show all 11 Subjects
Abstract:
... Lignocellulosic materials are the largest component of biomass in the world, and therefore suitable substrates for anaerobic digestion (AD). However, they are recalcitrant due to lignin-encrustation and the crystallinity of cellulose. Utilizing the wealth of knowledge in literature, this study compares different bioaugmentation strategies for the AD of Axonopus compressus, common name cowgrass, fr ...
DOI:
10.1016/j.jclepro.2020.120932

13. Evaluation of methane emission flux from a typical biogas fermentation ecosystem in China

Author:
Zeng, Jin; Xu, Rui; Sun, Rong; Niu, Lede; Liu, Ying; Zhou, Ying; Zeng, Weiqing; Yue, Zhiqiang
Source:
Journal of cleaner production 2020 v.257 pp. 120441
ISSN:
0959-6526
Subject:
methane production,   etc   ; biogas; ecosystems; environmental factors; farmers; fermentation; greenhouse gas emissions; methane; sustainable agriculture; temperature; China;     Show all 11 Subjects
Abstract:
... To reduce greenhouse gas emissions and promote sustainable agricultural practices in China, this study used conventional method to examine methane (CH₄) production from hydraulic biogas digesters in Jiuxi Town, Yunnan Province, China. The static chamber technique was utilized to measure CH₄ emission fluxes from the inlet and outlet of the biogas digesters. For the 100 m³ biogas digester, CH₄ emiss ...
DOI:
10.1016/j.jclepro.2020.120441

14. Effects of intermittent mixing mode on solid state anaerobic digestion of agricultural wastes

Author:
Wang, Yaya; Zhang, Jiaxing; Sun, Yanbo; Yu, Jiadong; Zheng, Zehui; Li, Shuyan; Cui, Zongjun; Hao, Jianjun; Li, Guoxue
Source:
Chemosphere 2020 v.248 pp. 126055
ISSN:
0045-6535
Subject:
methane production,   etc   ; Methanoculleus; Methanosarcina; anaerobic digestion; bacteria; corn stover; cucumbers; methanogens; physicochemical properties; pig manure;     Show all 10 Subjects
Abstract:
... This study investigated the effects of three different intermittent mixing modes (top, middle and bottom) on the performance of solid state anaerobic digestion (SS-AD) process of pig manure, corn stover and cucumber residues in a stirred tank reactor (STR). Results showed the cumulative methane yields of reactors had similar values (P > 0.05) except for the unmixed reactor (CK), which had a very l ...
DOI:
10.1016/j.chemosphere.2020.126055

15. Preliminary evaluation of the anaerobic biodegradability of three biobased materials used for the production of disposable plastics

Author:
Calabro’, P.S.; Folino, A.; Fazzino, F.; Komilis, D.
Source:
Journal of hazardous materials 2020 v.390 pp. 121653
ISSN:
0304-3894
Subject:
methane production,   etc   ; bags; biobased products; biodegradability; inoculum; markets; methane; models; pollution; polyethylene; sodium hydroxide; temperature; wines;     Show all 13 Subjects
Abstract:
... Biodegradable plastics have been introduced to the market to substitute “traditional”, non-biodegradable, petro-based plastics to alleviate plastic pollution. Biochemical methane potential tests were carried out on compostable bags made of MaterBi®, biodegradable bottle wine corks and cellulosic plates to examine the anaerobic biodegradability of those materials. The impact of four factors: type o ...
DOI:
10.1016/j.jhazmat.2019.121653

16. Enhanced methane generation and biodegradation efficiencies of goose manure by thermal-sonication pretreatment and organic loading management in CSTR

Author:
Hassan, Muhammad; Zhao, Chao; Ding, Weimin
Source:
Energy 2020 v.198 pp. 117370
ISSN:
0360-5442
Subject:
methane production,   etc   ; anaerobic digestion; biochemistry; biodegradation; chemical oxygen demand; geese; methane; sonication;     Show all 8 Subjects
Abstract:
... The current research investigated the effects of thermal-sonication pretreatment on the anaerobic digestion of goose manure. The CSTRs were run at three different organic loading rates: 1.4 g-VS/L.day, 2.9 g-VS/L.day and 4.4 g-VS/L.day, consequently termed as Phase-1, Phase-2 and Phase-3, respectively, and five different sonication pretreatments levels: (25 min, 45 min, 60 min, 90 min, and 120 min ...
DOI:
10.1016/j.energy.2020.117370

17. Development of mixed anaerobic culture for degrading high concentrations of chlorophenols

Author:
Goel, M.; Ramesh, M.; Sudarsan, J. S.; Kanawade, R.; Nithiyanantham, S.
Source:
International journal of environmental science and technology 2020 v.17 no.5 pp. 2689-2696
ISSN:
1735-1472
Subject:
methane production,   etc   ; 2,4-dichlorophenol; 4-chlorophenol; acclimation; anaerobic conditions; glucose; mixed culture; pH; pentachlorophenol;     Show all 9 Subjects
Abstract:
... This study details the development of mixed anaerobic culture capable of degrading high concentrations of chlorophenols; 4-chlorophenol (MCP), 2,4-dichlorophenol (DCP) and pentachlorophenol (PCP) were used for that purpose. The role of glucose concentration and the relative potential of mixed culture for acclimatization of different chlorophenols under anaerobic conditions were studied. Methane pr ...
DOI:
10.1007/s13762-019-02595-x

18. Dynamic operation of fixed-bed methanation reactors: Yield control by catalyst dilution profile and magnetic induction

Author:
Fache, Axel; Marias, Frédéric
Source:
Renewable energy 2020 v.151 pp. 865-886
ISSN:
0960-1481
Subject:
methane production,   etc   ; catalysts; catalytic activity; computer software; energy; magnetism; models; pellets; renewable energy sources;     Show all 9 Subjects
Abstract:
... Dynamic operation of fixed-bed methanation reactors has been subject to increasing research efforts over the past years, as a consequence of its potential interest for the energy transition (power-to-gas). Due to the reaction exothermicity, the thermal management of a reactor is particularly difficult. In the present work, a model and a software are developed to simulate the behavior of a reactor ...
DOI:
10.1016/j.renene.2019.11.081

19. Optimization ofS/Fe ratio for enhanced nitrobenzene biological removal in anaerobicSystem amended withSulfide-modified nanoscale zerovalent iron

Author:
Zhang, Dejin; Li, Yang; Sun, Aiwu; Tong, Siqi; Jiang, Xinbai; Mu, Yang; Li, Jiansheng; Han, Weiqing; Sun, Xiuyun; Wang, Lianjun; Shen, Jinyou
Source:
Chemosphere 2020 v.247 pp. 125832
ISSN:
0045-6535
Subject:
methane production,   etc   ; aniline; biodiversity; enzymes; fermentation; iron; methane; nitroaromatic compounds; nitrobenzenes; volatile fatty acids; wastewater;     Show all 11 Subjects
Abstract:
... Anaerobic reduction of nitrobenzene (NB) can be efficiently enhanced bySupplementing withSulfide-modified nanoscale zerovalent iron (S-nZVI). In thisStudy,S/Fe ratio ofS-nZVI was further optimized for enhancing biological NB removal in anaerobicSystem amended withS-nZVI and inoculated by anaerobicSludge. The results indicated that the performance andStability of the coupled anaerobicSystem for NB ...
DOI:
10.1016/j.chemosphere.2020.125832

20. Particle size, inoculum-to-substrate ratio and nutrient media effects on biomethane yield from food waste

Author:
Okoro- Shekwaga, Cynthia Kusin; Turnell Suruagy, Mariana Vieira; Ross, Andrew; Camargo- Valero, Miller Alonso
Source:
Renewable energy 2020 v.151 pp. 311-321
ISSN:
0960-1481
Subject:
methane production,   etc   ; anaerobic digestion; biogas; electricity; energy; food waste; heat; methane; particle size; volatile fatty acids;     Show all 10 Subjects
Abstract:
... This study investigates the effects of particle size reduction at different inoculum-to-substrate ratios and nutrient media supplementation on the assessment of biomethane production from food waste, under batch mesophilic conditions. Two different food waste samples were used and the best method for testing biomethane potential was chosen based on their characterisation and methane yields. Result ...
DOI:
10.1016/j.renene.2019.11.028