1
|
Ozsefil IC, Miraloglu IH, Ozbayram EG, Ince B, Ince O. Bioaugmentation of anaerobic digesters with the enriched lignin-degrading microbial consortia through a metagenomic approach. CHEMOSPHERE 2024; 355:141831. [PMID: 38561162 DOI: 10.1016/j.chemosphere.2024.141831] [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: 12/16/2023] [Revised: 03/25/2024] [Accepted: 03/26/2024] [Indexed: 04/04/2024]
Abstract
The recalcitrance of lignin impedes the efficient utilization of lignocellulosic biomass, hindering the efficient production of biogas and value-added materials. Despite the emergence of anaerobic digestion as a superior alternative to the aerobic method for lignin processing, achieving its feasibility requires thorough characterization of lignin-degrading anaerobic microorganisms, assessment of their biomethane production potential, and a comprehensive understanding of the degradation pathway. This study aimed to address the aforementioned necessities by bioaugmenting seed sludge with three distinct enriched lignin-degrading microbial consortia at both 25 °C and 37 °C. Enhanced biomethane yields was detected in the bioaugmented digesters, while the highest production was observed as 188 mLN CH4 gVS-1 in digesters operated at 37 °C. Moreover, methane yield showed a significant improvement in the samples at 37 °C ranging from 110% to 141% compared to the control, demonstrating the efficiency of the enriched lignin-degrading microbial community. Temperature and substrate were identified as key factors influencing microbial community dynamics. The observation that microbial communities tended to revert to the initial state after lignin depletion, indicating the stability of the overall microbiota composition in the digesters, is a promising finding for large-scale studies. Noteworthy candidates for lignin degradation, including Sporosarcina psychrophila, Comamonas aquatica, Shewanella baltica, Pseudomonas sp. C27, and Brevefilum fermentans were identified in the bioaugmented samples. PICRUSt2 predictions suggest that the pathway and specific proteins involved in anaerobic lignin degradation might share similarities with those engaged in the degradation of aromatic compounds.
Collapse
Affiliation(s)
- Ibrahim Cem Ozsefil
- Bogazici University, Institute of Environmental Sciences, Bebek, 34342, Istanbul, Turkey
| | | | - E Gozde Ozbayram
- Istanbul University, Faculty of Aquatic Sciences, Department of Marine and Freshwater Resources Management, Fatih, 34134, Istanbul, Turkey
| | - Bahar Ince
- Bogazici University, Institute of Environmental Sciences, Bebek, 34342, Istanbul, Turkey
| | - Orhan Ince
- Department of Environmental Engineering, Faculty of Civil Engineering, Istanbul Technical University, Maslak, 34396, Istanbul, Turkey
| |
Collapse
|
2
|
Walls LE, Otoupal P, Ledesma-Amaro R, Velasquez-Orta SB, Gladden JM, Rios-Solis L. Bioconversion of cellulose into bisabolene using Ruminococcus flavefaciens and Rhodosporidium toruloides. BIORESOURCE TECHNOLOGY 2023; 368:128216. [PMID: 36347482 DOI: 10.1016/j.biortech.2022.128216] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/24/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
In this study, organic acids were demonstrated as a promising carbon source for bisabolene production by the non-conventional yeast, Rhodosporidium toruloides, at microscale with a maximum titre of 1055 ± 7 mg/L. A 125-fold scale-up of the optimal process, enhanced bisabolene titres 2.5-fold to 2606 mg/L. Implementation of a pH controlled organic acid feeding strategy at this scale lead to a further threefold improvement in bisabolene titre to 7758 mg/L, the highest reported microbial titre. Finally, a proof-of-concept sequential bioreactor approach was investigated. Firstly, the cellulolytic bacterium Ruminococcus flavefaciens was employed to ferment cellulose, yielding 4.2 g/L of organic acids. R. toruloides was subsequently cultivated in the resulting supernatant, producing 318 ± 22 mg/L of bisabolene. This highlights the feasibility of a sequential bioprocess for the bioconversion of cellulose, into biojet fuel candidates. Future work will focus on enhancing organic acid yields and the use of real lignocellulosic feedstocks to further enhance bisabolene production.
Collapse
Affiliation(s)
- Laura E Walls
- Institute for Bioengineering, School of Engineering, University of Edinburgh, Edinburgh EH9 3BF, UK; Centre for Synthetic and Systems Biology (SynthSys), University of Edinburgh, Edinburgh EH9 3BF, UK
| | - Peter Otoupal
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA 94608, USA; Agile BioFoundry, Department of Energy, Emeryville, CA 94608, USA; Biomaterials and Biomanufacturing Department, Sandia National Laboratories, Livermore, CA 94551, USA
| | - Rodrigo Ledesma-Amaro
- Department of Bioengineering and Imperial College Centre for Synthetic Biology, Imperial College London, London SW7 2AZ, UK
| | | | - John M Gladden
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA 94608, USA; Agile BioFoundry, Department of Energy, Emeryville, CA 94608, USA; Biomaterials and Biomanufacturing Department, Sandia National Laboratories, Livermore, CA 94551, USA
| | - Leonardo Rios-Solis
- Institute for Bioengineering, School of Engineering, University of Edinburgh, Edinburgh EH9 3BF, UK; Centre for Synthetic and Systems Biology (SynthSys), University of Edinburgh, Edinburgh EH9 3BF, UK; School of Natural and Environmental Sciences, Molecular Biology and Biotechnology Division, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK.
| |
Collapse
|
3
|
Weimer PJ. Degradation of Cellulose and Hemicellulose by Ruminal Microorganisms. Microorganisms 2022; 10:2345. [PMID: 36557598 PMCID: PMC9785684 DOI: 10.3390/microorganisms10122345] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 11/19/2022] [Accepted: 11/26/2022] [Indexed: 11/29/2022] Open
Abstract
As major structural components of plant cell walls, cellulose and hemicellulose are degraded and fermented by anaerobic microbes in the rumen to produce volatile fatty acids, the main nutrient source for the host. Cellulose degradation is carried out primarily by specialist bacteria, with additional contributions from protists and fungi, via a variety of mechanisms. Hemicelluloses are hydrolyzed by cellulolytic bacteria and by generalist, non-cellulolytic microbes, largely via extracellular enzymes. Cellulose hydrolysis follows first-order kinetics and its rate is limited by available substrate surface area. Nevertheless, its rate is at least an order of magnitude more rapid than in anaerobic digesters, due to near-obligatory adherence of microbial cells to the cellulose surface, and a lack of downstream inhibitory effects; in the host animal, fiber degradation rate is also enhanced by the unique process of rumination. Cellulolytic and hemicellulolytic microbes exhibit intense competition and amensalism, but they also display mutualistic interactions with microbes at other trophic levels. Collectively, the fiber-degrading community of the rumen displays functional redundancy, partial niche overlap, and convergence of catabolic pathways that all contribute to stability of the ruminal fermentation. The superior hydrolytic and fermentative capabilities of ruminal fiber degraders make them promising candidates for several fermentation technologies.
Collapse
Affiliation(s)
- Paul J Weimer
- Department of Bacteriology, University of Wisconsin, Madison, WI 53706, USA
| |
Collapse
|
4
|
Basak B, Patil SM, Kumar R, Ahn Y, Ha GS, Park YK, Ali Khan M, Jin Chung W, Woong Chang S, Jeon BH. Syntrophic bacteria- and Methanosarcina-rich acclimatized microbiota with better carbohydrate metabolism enhances biomethanation of fractionated lignocellulosic biocomponents. BIORESOURCE TECHNOLOGY 2022; 360:127602. [PMID: 35835420 DOI: 10.1016/j.biortech.2022.127602] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
An inadequate lignocellulolytic capacity of a conventional anaerobic digester sludge (ADS) microbiota is the bottleneck for the maximal utilization of lignocellulose in anaerobic digestion. A well-constructed microbial consortium acclimatized to lignocellulose outperformed the ADS in terms of biogas productivity when fractionated biocomponents of rice straw were used to achieve a high methane bioconversion rate. A 33.3 % higher methane yield was obtained with the acclimatized consortium (AC) compared to that of ADS control. The dominant pair-wise link between Firmicutes (18.99-40.03 %), Bacteroidota (10.94-28.75 %), and archaeal Halobacteriota (3.59-20.57 %) phyla in the AC seed digesters indicated that the keystone members of these phyla were responsible for higher methane yield. A high abundance of syntrophic bacteria such as Proteiniphilum (1.22-5.19 %), Fermentimonas (0.71-5.31 %), Syntrophomonas (0.87-3.59 %), and their syntrophic partner Methanosarcina (4.26-18.80 %) maintained the digester stability and facilitated higher substrate-to-methane conversion in the AC seed digesters. The present combined strategy will help in boosting the 'biomass-to-methane" conversion.
Collapse
Affiliation(s)
- Bikram Basak
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea; Petroleum and Mineral Research Institute, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Swapnil M Patil
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Ramesh Kumar
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Yongtae Ahn
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea; Petroleum and Mineral Research Institute, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Geon-Soo Ha
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea
| | - Moonis Ali Khan
- Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Woo Jin Chung
- Department of Environmental Energy Engineering, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
| | - Soon Woong Chang
- Department of Environmental Energy Engineering, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, Republic of Korea
| | - Byong-Hun Jeon
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
| |
Collapse
|
5
|
Jia Y, Zhao S, Guo W, Peng L, Zhao F, Wang L, Fan G, Zhu Y, Xu D, Liu G, Wang R, Fang X, Zhang H, Kristiansen K, Zhang W, Chen J. Sequencing introduced false positive rare taxa lead to biased microbial community diversity, assembly, and interaction interpretation in amplicon studies. ENVIRONMENTAL MICROBIOME 2022; 17:43. [PMID: 35978448 PMCID: PMC9387074 DOI: 10.1186/s40793-022-00436-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Increasing studies have demonstrated potential disproportionate functional and ecological contributions of rare taxa in a microbial community. However, the study of the microbial rare biosphere is hampered by their inherent scarcity and the deficiency of currently available techniques. Sample-wise cross contaminations might be introduced by sample index misassignment in the most widely used metabarcoding amplicon sequencing approach. Although downstream bioinformatic quality control and clustering or denoising algorithms could remove sequencing errors and non-biological artifact reads, no algorithm could eliminate high quality reads from sample-wise cross contaminations introduced by index misassignment, making it difficult to distinguish between bona fide rare taxa and potential false positives in metabarcoding studies. RESULTS We thoroughly evaluated the rate of index misassignment of the widely used NovaSeq 6000 and DNBSEQ-G400 sequencing platforms using both commercial and customized mock communities, and observed significant lower (0.08% vs. 5.68%) fraction of potential false positive reads for DNBSEQ-G400 as compared to NovaSeq 6000. Significant batch effects could be caused by stochastically introduced false positive or false negative rare taxa. These false detections could also lead to inflated alpha diversity of relatively simple microbial communities and underestimated that of complex ones. Further test using a set of cow rumen samples reported differential rare taxa by different sequencing platforms. Correlation analysis of the rare taxa detected by each sequencing platform demonstrated that the rare taxa identified by DNBSEQ-G400 platform had a much higher possibility to be correlated with the physiochemical properties of rumen fluid as compared to NovaSeq 6000 platform. Community assembly mechanism and microbial network correlation analysis indicated that false positive or negative rare taxa detection could lead to biased community assembly mechanism and identification of fake keystone species of the community. CONCLUSIONS We highly suggest proper positive/negative/blank controls, technical replicate settings, and proper sequencing platform selection in future amplicon studies, especially when the microbial rare biosphere would be focused.
Collapse
Affiliation(s)
- Yangyang Jia
- BGI-Shenzhen, Shenzhen, 518083, China
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Shengguo Zhao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Wenjie Guo
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Ling Peng
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Fang Zhao
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Lushan Wang
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, 266237, China
| | - Guangyi Fan
- BGI-Shenzhen, Shenzhen, 518083, China
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Yuanfang Zhu
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Dayou Xu
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Guilin Liu
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | - Ruoqing Wang
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
| | | | - He Zhang
- BGI-Shenzhen, Shenzhen, 518083, China
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China
- Department of Biology, Hong Kong Baptist University, Hong Kong, China
| | - Karsten Kristiansen
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, 2100, Copenhagen, Denmark.
- Qingdao-Europe Advanced Institute for Life Sciences, BGI-Shenzhen, Qingdao, 266555, China.
| | - Wenwei Zhang
- BGI-Shenzhen, Shenzhen, 518083, China.
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China.
| | - Jianwei Chen
- BGI-Qingdao, BGI-Shenzhen, Qingdao, 266555, China.
- Laboratory of Genomics and Molecular Biomedicine, Department of Biology, University of Copenhagen, Universitetsparken 13, 2100, Copenhagen, Denmark.
- Qingdao-Europe Advanced Institute for Life Sciences, BGI-Shenzhen, Qingdao, 266555, China.
| |
Collapse
|
6
|
Dowd B, McDonnell D, Tuohy MG. Current Progress in Optimising Sustainable Energy Recovery From Cattle Paunch Contents, a Slaughterhouse Waste Product. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.722424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Paunch contents are the recalcitrant, lignocellulose-rich, partially-digested feed present in the rumen of ruminant animals. Cattle forage in Europe is primarily from perennial and Italian ryegrasses and/or white clover, so paunch contents from forage-fed cattle in Europe is enriched in these feedstuffs. Globally, due to its underutilisation, the potential energy in cattle paunch contents annually represents an energy loss of 23,216,548,750–27,804,250,000 Megajoules (MJ) and financial loss of up to ~€800,000,000. Therefore, this review aims to describe progress made to-date in optimising sustainable energy recovery from paunch contents. Furthermore, analyses to determine the economic feasibility/potential of recovering sustainable energy from paunch contents was carried out. The primary method used to recover sustainable energy from paunch contents to-date has involved biomethane production through anaerobic digestion (AD). The major bottleneck in its utilisation through AD is its recalcitrance, resulting in build-up of fibrous material. Pre-treatments partially degrade the lignocellulose in lignocellulose-rich wastes, reducing their recalcitrance. Enzyme systems could be inexpensive and more environmentally compatible than conventional solvent pre-treatments. A potential source of enzyme systems is the rumen microbiome, whose efficiency in lignocellulose degradation is attracting significant research interest. Therefore, the application of rumen fluid (liquid derived from dewatering of paunch contents) to improve biomethane production from AD of lignocellulosic wastes is included in this review. Analysis of a study where rumen fluid was used to pre-treat paper sludge from a paper mill prior to AD for biomethane production suggested economic feasibility for CHP combustion, with potential savings of ~€11,000 annually. Meta-genomic studies of bacterial/archaeal populations have been carried out to understand their ruminal functions. However, despite their importance in degrading lignocellulose in nature, rumen fungi remain comparatively under-investigated. Further investigation of rumen microbes, their cultivation and their enzyme systems, and the role of rumen fluid in degrading lignocellulosic wastes, could provide efficient pre-treatments and co-digestion strategies to maximise biomethane yield from a range of lignocellulosic wastes. This review describes current progress in optimising sustainable energy recovery from paunch contents, and the potential of rumen fluid as a pre-treatment and co-substrate to recover sustainable energy from lignocellulosic wastes using AD.
Collapse
|
7
|
Yu Z, Ma H, Boer ED, Wu W, Wang Q, Gao M, Vo DVN, Guo M, Xia C. Effect of microwave/hydrothermal combined ionic liquid pretreatment on straw: Rumen anaerobic fermentation and enzyme hydrolysis. ENVIRONMENTAL RESEARCH 2022; 205:112453. [PMID: 34843726 DOI: 10.1016/j.envres.2021.112453] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 06/13/2023]
Abstract
To explore green technology for wheat straw pretreatment, this study combined the microwave or hydrothermal with ionic liquid ([Bmim][OAc]) on wheat straw followed by rumen fermentation. The optimal conditions of microwave assisted ionic liquids pretreatment (M-I) and hydrothermal assisted ionic liquids pretreatment (H-I) treatment were 360 W and 200 °C, and the corresponding lignin removal rates reached 35.3% and 25.4%, respectively. Rumen fermentation showed that the highest volatile fatty acid (VFA) yield was found in M-I group, followed by H-I group at 234 and 180 mg/g, respectively. As for enzymatic hydrolysis, the saccharification rates at 3 days of M-I (360 W) and H-I (200 °C) were determined to be 393 and 320 mg/g. The optimal ionic liquid dosage was determined to be 30% in consideration of cost and VFA conversion rate. M-I pretreatment plus the rumen fermentation enjoyed the benefit of no enzyme addition and high product recovery, which was worth further investigating.
Collapse
Affiliation(s)
- Ziqiang Yu
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Hongzhi Ma
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China.
| | - Emilia den Boer
- Faculty of Environmental Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370, Wroclaw, Poland
| | - Wenyu Wu
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Qunhui Wang
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Ming Gao
- Department of Environmental Science and Engineering, University of Science and Technology, Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Dai-Viet N Vo
- Institute of Environmental Sciences, Nguyen Tat Thanh University, Ho Chi Minh City, 755 414, Viet Nam
| | - Ming Guo
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, 311300, China
| | - Changlei Xia
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China.
| |
Collapse
|
8
|
Basak B, Ahn Y, Kumar R, Hwang JH, Kim KH, Jeon BH. Lignocellulolytic microbiomes for augmenting lignocellulose degradation in anaerobic digestion. Trends Microbiol 2021; 30:6-9. [PMID: 34610897 DOI: 10.1016/j.tim.2021.09.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 02/07/2023]
Abstract
Bioaugmenting lignocellulose digestion with potent lignocellulolytic microbiomes (LMs) facilitates efficient biomethanation. Assessing the metabolic roles of microbial communities of the LMs and their complex interactions with the indigenous anaerobic digester microbiome is pivotal in implementing bioaugmentation. Multiple meta-omics are the frontline approaches to investigating gene functions, metabolic roles, and the ecological niches of LMs.
Collapse
Affiliation(s)
- Bikram Basak
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Yongtae Ahn
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Ramesh Kumar
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Jae-Hoon Hwang
- Department of Civil, Environmental and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea.
| |
Collapse
|
9
|
Gozde Ozbayram E. Waste to energy: valorization of spent tea waste by anaerobic digestion. ENVIRONMENTAL TECHNOLOGY 2021; 42:3554-3560. [PMID: 32530785 DOI: 10.1080/09593330.2020.1782477] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
The conversion of renewable resources into value-added products such as bioenergy is one of the growing concerns of bioeconomy strategy. Within this concept, assessing the proper combination of local wastes has major importance. This study set out to assess the feasibility of using spent tea waste as a single and co-substrate on anaerobic digestion and to explore the influence of the amount of microorganisms on the digester performance. For this purpose, biomethane potentials tests were conducted for seven different mixing ratios of spent tea waste and cow manure on a mass basis. The reactors operated under mesophilic conditions for 20 days with two inoculum/substrate ratios. The results revealed that using spent tea waste as a co-substrate did not reveal a significant effect on biomethane production in the reactors. Contrarily, the amount of inoculum had a remarkable effect on biomethane production, resulted in an increase in methane production between 28 and 32%. While the biomethane yields were in the range of 129-138 mLN CH4 gVS-1 for the co-digesters operated with inoculum/substrate ratio of 1, the range was 165-181 mLN CH4 gVS-1 for the co-digesters operated with inoculum/substrate ratio of 2. These findings represent the potential usage of the spent tea waste as a co-substrate within the sustainable waste management approach and are relevant to plant operators.
Collapse
Affiliation(s)
- E Gozde Ozbayram
- Department of Marine and Freshwater Resources Management, Faculty of Aquatic Sciences, Istanbul University, Istanbul, Turkey
| |
Collapse
|
10
|
Chukwuma OB, Rafatullah M, Tajarudin HA, Ismail N. A Review on Bacterial Contribution to Lignocellulose Breakdown into Useful Bio-Products. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:6001. [PMID: 34204975 PMCID: PMC8199887 DOI: 10.3390/ijerph18116001] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/28/2021] [Accepted: 05/28/2021] [Indexed: 12/15/2022]
Abstract
Discovering novel bacterial strains might be the link to unlocking the value in lignocellulosic bio-refinery as we strive to find alternative and cleaner sources of energy. Bacteria display promise in lignocellulolytic breakdown because of their innate ability to adapt and grow under both optimum and extreme conditions. This versatility of bacterial strains is being harnessed, with qualities like adapting to various temperature, aero tolerance, and nutrient availability driving the use of bacteria in bio-refinery studies. Their flexible nature holds exciting promise in biotechnology, but despite recent pointers to a greener edge in the pretreatment of lignocellulose biomass and lignocellulose-driven bioconversion to value-added products, the cost of adoption and subsequent scaling up industrially still pose challenges to their adoption. However, recent studies have seen the use of co-culture, co-digestion, and bioengineering to overcome identified setbacks to using bacterial strains to breakdown lignocellulose into its major polymers and then to useful products ranging from ethanol, enzymes, biodiesel, bioflocculants, and many others. In this review, research on bacteria involved in lignocellulose breakdown is reviewed and summarized to provide background for further research. Future perspectives are explored as bacteria have a role to play in the adoption of greener energy alternatives using lignocellulosic biomass.
Collapse
Affiliation(s)
| | - Mohd Rafatullah
- Division of Environmental Technology, School of Industrial Technology, Universiti Sains Malaysia, Gelugor 11800, Penang, Malaysia; (O.B.C.); (H.A.T.); (N.I.)
| | | | | |
Collapse
|
11
|
Li Y, Zhao J, Krooneman J, Euverink GJW. Strategies to boost anaerobic digestion performance of cow manure: Laboratory achievements and their full-scale application potential. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 755:142940. [PMID: 33348487 DOI: 10.1016/j.scitotenv.2020.142940] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/03/2020] [Accepted: 10/04/2020] [Indexed: 06/12/2023]
Abstract
Cow manure represents a surplus manure waste in agricultural food sectors, which requires proper disposal. Anaerobic digestion, in this regard, has raised global interest owing to its apparent environmental benefits, including simultaneous waste diminishment and renewable energy generation. However, dedicated intensifications are necessary to promote the degradation of recalcitrant lignocellulosic components of cow manure. Hence, this manuscript presents a review of how to exploit cow manure in anaerobic digestion through different incentives extensively at lab-scale and full-scale. These strategies comprise 1) co-digestion; 2) pretreatment; 3) introduction of additives (trace metals, carbon-based materials, low-cost composites, nanomaterials, and microbial cultures); 4) innovative systems (bio-electrochemical fields and laser irradiation). Results imply that co-digestion and pretreatment approaches gain the predominance on promoting the digestion performance of cow manure. Particularly, for the co-digestion scenario, the selection of lignin-poor co-substrate is highlighted to produce maximum synergy and pronounced removal of lignocellulosic compounds of cow manure. Mechanical, thermal, and biological (composting) pretreatments generate mild improvement at laboratory-scale and are proved applicable in full-scale facilities. It is noteworthy that the introduction of additives (Fe-based nanomaterials, carbon-based materials, and composites) is acquiring more attention and shows promising full-scale application potential. Finally, bio-electrochemical fields stand out in laboratory trials and may serve as future reactor modules in agricultural anaerobic digestion installations treating cow manure.
Collapse
Affiliation(s)
- Yu Li
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands
| | - Jing Zhao
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands
| | - Janneke Krooneman
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands
| | - Gert Jan Willem Euverink
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands.
| |
Collapse
|
12
|
Huang Q, Zakaria BS, Zhang Y, Zhang L, Liu Y, Dhar BR. A high-rate anaerobic biofilm reactor for biomethane recovery from source-separated blackwater at ambient temperature. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:61-74. [PMID: 32329182 DOI: 10.1002/wer.1347] [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: 01/13/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Anaerobic bioreactors for source-separated blackwater are mostly operated at low organic loading rates (OLRs) due to low biodegradability and the potential of ammonia inhibition. In this study, an anaerobic biofilm reactor having conductive carbon fibers as the media was investigated for the high-rate treatment of blackwater collected from vacuum toilets. The bioreactor was operated at different OLRs ranged from 0.77 to 3.01 g COD/L-d in four stages for a total operating period of ~ 250 days. With the increase of OLRs, the specific methane production rate increased from 105.3 to 304.6 ml/L-d with high methane content in biogas (75.5%-83%). The maximum methane yield was achieved at hydraulic retention time (HRT) of 15 days. Highest organics and suspended solids removal (80%-83%) were achieved at 20-days HRT, while increased OLRs resulted in diminished removal efficiencies. The state variables, including pH, total ammonia nitrogen, short-chain volatile fatty acids, and soluble chemical oxygen demand, indicated the system had a great capability to withstand the high OLRs. Microbial community analysis revealed that the high performance might be attributed to direct interspecies electron transfer (DIET) facilitated by potentially electroactive bacteria (e.g., Syntrophomonas, Clostridium) and electrotrophic archaea (e.g., Methanosaeta and Methanosarcina species) enriched on the carbon fibers. PRACTITIONER POINTS: An anaerobic biofilm reactor was investigated for biomethane recovery from source-separated blackwater. Conductive carbon fibers were utilized as the media to stimulate enrichment of potentially electroactive methanogenic communities. The bioreactor was operated at ambient temperature for over 250 days. High methane production rate and high-quality biogas were achieved at OLRs ranged from 0.77 to 3.01 g COD/L-d. Microbial community analysis suggested direct interspecies electron transfer (DIET) between specific electroactive bacteria and electrotrophic archaea.
Collapse
Affiliation(s)
- Qi Huang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| | - Basem S Zakaria
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| | - Yingdi Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| | - Lei Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| | - Bipro R Dhar
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| |
Collapse
|
13
|
Khoshnevisan B, Duan N, Tsapekos P, Awasthi MK, Liu Z, Mohammadi A, Angelidaki I, Tsang DCW, Zhang Z, Pan J, Ma L, Aghbashlo M, Tabatabaei M, Liu H. A critical review on livestock manure biorefinery technologies: Sustainability, challenges, and future perspectives. RENEWABLE AND SUSTAINABLE ENERGY REVIEWS 2021; 135:110033. [DOI: 10.1016/j.rser.2020.110033] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
|
14
|
Baba Y, Matsuki Y, Takizawa S, Suyama Y, Tada C, Fukuda Y, Saito M, Nakai Y. Pretreatment of Lignocellulosic Biomass with Cattle Rumen Fluid for Methane Production: Fate of Added Rumen Microbes and Indigenous Microbes of Methane Seed Sludge. Microbes Environ 2019; 34:421-428. [PMID: 31748428 PMCID: PMC6934390 DOI: 10.1264/jsme2.me19113] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 09/17/2019] [Indexed: 11/29/2022] Open
Abstract
The pretreatment of lignocellulosic substrates with cattle rumen fluid was successfully developed to increase methane production. In the present study, a 16S rRNA gene-targeted amplicon sequencing approach using the MiSeq platform was applied to elucidate the effects of the rumen fluid treatment on the microbial community structure in laboratory-scale batch methane fermenters. Methane production in fermenters fed rumen fluid-treated rapeseed (2,077.3 mL CH4 reactor-1 for a 6-h treatment) was markedly higher than that in fermenters fed untreated rapeseed (1,325.8 mL CH4 reactor-1). Microbial community profiling showed that the relative abundance of known lignocellulose-degrading bacteria corresponded to lignocellulose-degrading enzymatic activities. Some dominant indigenous cellulolytic and hemicellulolytic bacteria in seed sludge (e.g., Cellulosilyticum lentocellum and Ruminococcus flavefaciens) and rumen fluid (e.g., Butyrivibrio fibrisolvens and Prevotella ruminicola) became undetectable or markedly decreased in abundance in the fermenters fed rumen fluid-treated rapeseed, whereas some bacteria derived from seed sludge (e.g., Ruminofilibacter xylanolyticum) and rumen fluid (e.g., R. albus) remained detectable until the completion of methane production. Thus, several lignocellulose-degrading bacteria associated with rumen fluid proliferated in the fermenters, and may play an important role in the degradation of lignocellulosic compounds in the fermenter.
Collapse
Affiliation(s)
- Yasunori Baba
- Laboratory of Sustainable Animal Environmental Science, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
- Research Fellow of the Japanese Society for the Promotion of Science (JSPS)Japan
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural UniversitySuematsu1–308, Nonoichi, Ishikawa 921–8836Japan
| | - Yu Matsuki
- Laboratory of Forest Ecology, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
| | - Shuhei Takizawa
- Laboratory of Sustainable Animal Environmental Science, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
| | - Yoshihisa Suyama
- Laboratory of Forest Ecology, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
| | - Chika Tada
- Laboratory of Sustainable Animal Environmental Science, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
| | - Yasuhiro Fukuda
- Laboratory of Sustainable Animal Environmental Science, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
| | - Masanori Saito
- Laboratory of Environmental Crop Science, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
| | - Yutaka Nakai
- Laboratory of Sustainable Animal Environmental Science, Graduate School of Agricultural Science, Tohoku UniversityYomogida 232–3, Naruko-onsen, Osaki, Miyagi 989–6711Japan
- Department of Agro-Food Science, Faculty of Agro-Food Science, Niigata Agro-Food University2416 Hiranedai, Tainai, Niigata, 959–2702Japan
| |
Collapse
|
15
|
Ozbayram EG, Kleinsteuber S, Nikolausz M. Biotechnological utilization of animal gut microbiota for valorization of lignocellulosic biomass. Appl Microbiol Biotechnol 2019; 104:489-508. [DOI: 10.1007/s00253-019-10239-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/25/2019] [Accepted: 11/04/2019] [Indexed: 10/25/2022]
|
16
|
Xu S, Zhu J, Meng Z, Li W, Ren S, Wang T. Hydrogen and methane production by co-digesting liquid swine manure and brewery wastewater in a two-phase system. BIORESOURCE TECHNOLOGY 2019; 293:122041. [PMID: 31465897 DOI: 10.1016/j.biortech.2019.122041] [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: 07/22/2019] [Revised: 08/15/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Co-digesting liquid swine manure and brewery wastewater for hydrogen and methane production was studied using an integrated, two-phase system with different organic loading rates (OLR) under mesophilic conditions. The highest volumetric hydrogen and methane production rates achieved were 294.06 ± 3.06 mL H2 L-1 d-1 and 497.94 ± 10.01 mL CH4 L-1 d-1, respectively, at the OLR of 8613.6 mg COD L-1 d-1, together with the highest hydrogen-COD and -TVS yields (34.14 ± 0.36 mL g-1 COD and 45.46 ± 0.71 mL g-1 TVS) and the maximum methane-TVS yield (261.42 ± 8.41 mL g-1 TVS). The highest hydrogen and methane concentrations in the biogas (31.86 ± 0.68% and 82.66 ± 0.33%, respectively) were also obtained at this OLR. The maximum methane-COD yield (270.3 ± 3.93 mL g-1 COD), however, was from the lowest OLR (1148.6 mg COD L-1 d-1). The two-phase system removed 75.54 ± 0.19% of COD from the influent.
Collapse
Affiliation(s)
- Shaoe Xu
- College of Natural Resources and Environment, Northwest A&F University, 3 Taicheng Road, Yangling District, Xianyang, Shaanxi, China
| | - Jun Zhu
- Biological and Agricultural Engineering Department, University of Arkansas, 1 University of Arkansas, Fayetteville, AR, USA
| | - Zhaofu Meng
- College of Natural Resources and Environment, Northwest A&F University, 3 Taicheng Road, Yangling District, Xianyang, Shaanxi, China.
| | - Wenbin Li
- College of Environmental Science and Engineering, China West Normal University, 1 Shida Road, Shunqin District, Nanchong, Sichuan, China
| | - Shuang Ren
- College of Natural Resources and Environment, Northwest A&F University, 3 Taicheng Road, Yangling District, Xianyang, Shaanxi, China
| | - Teng Wang
- College of Natural Resources and Environment, Northwest A&F University, 3 Taicheng Road, Yangling District, Xianyang, Shaanxi, China
| |
Collapse
|
17
|
Nzila A, Razzak SA, Sankara S, Nazal MK, Al-Momani M, Kang GU, Ibal JC, Shin JH. Characterisation and microbial community analysis of lipid utilising microorganisms for biogas formation. PLoS One 2019; 14:e0224989. [PMID: 31703100 PMCID: PMC6839884 DOI: 10.1371/journal.pone.0224989] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 10/25/2019] [Indexed: 12/12/2022] Open
Abstract
In the anaerobic process, fat-oil-grease (FOG) is hydrolysed to long-chain fatty acids (LCFAs) and glycerol (GLYC), which are then used as substrates to produce biogas. The increase in FOG and LCFAs inhibits methanogenesis, and so far, most work investigating this inhibition has been carried out when FOG or LCFAs were used as co-substrates. In the current work, the inhibition of methanogenesis by FOG, LCFAs and GLYC was investigated when used as sole substrates. To gain more insight on the dynamics of this process, the change of microbial community was analysed using 16S rRNA gene amplicon sequencing. The results indicate that, as the concentrations of cooking olive oil (CO, which represents FOG) and LCFAs increase, methanogenesis is inhibited. For instance, at 0.01 g. L-1 of FOG, the rate of biogas formation was around 8 ml.L-1.day-1, and this decreased to <4 ml.L-1.day-1 at 40 g.L-1. Similar results were observed with the use of LCFAs. However, GLYC concentrations up to 100g.L-1 did not affect the rate of biogas formation. Acidic pH, temperature > = 45°C and NaCl > 3% led to a significant decrease in the rate of biogas formation. Microbial community analyses were carried out from samples from 3 different bioreactors (CO, OLEI and GLYC), on day 1, 5 and 15. In each bioreactor, microbial communities were dominated by Proteobacteria, Firmicutes and Bacteroidetes phyla. The most important families were Enterobacteriaceae, Pseudomonadaceae and Shewanellaceae (Proteobacteria phylum), Clostridiacea and Ruminococcaceae (Firmicutes) and Porphyromonadaceae and Bacteroidaceae (Bacteroidetes). In CO bioreactor, Proteobacteria bacteria decreased over time, while those of OLEI and GLYC bioreactors increased. A more pronounced increase in Bacteroidetes and Firmicutes were observed in CO bioreactor. The methanogenic archaea Methanobacteriaceae and Methanocorpusculaceae were identified. This analysis has shown that a set of microbial population is selected as a function of the substrate.
Collapse
Affiliation(s)
- Alexis Nzila
- Department of Life Sciences, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Shaikh Abdur Razzak
- Departments of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Saravanan Sankara
- Department of Life Sciences, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Mazen K. Nazal
- Research Institute, Center for Environment and Water, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Marwan Al-Momani
- Departments of Mathematics & Statistics, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Gi-Ung Kang
- School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jerald Conrad Ibal
- School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Ho Shin
- School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
| |
Collapse
|
18
|
Chouaia B, Goda N, Mazza G, Alali S, Florian F, Gionechetti F, Callegari M, Gonella E, Magoga G, Fusi M, Crotti E, Daffonchio D, Alma A, Paoli F, Roversi PF, Marianelli L, Montagna M. Developmental stages and gut microenvironments influence gut microbiota dynamics in the invasive beetle Popillia japonica Newman (Coleoptera: Scarabaeidae). Environ Microbiol 2019; 21:4343-4359. [PMID: 31502415 DOI: 10.1111/1462-2920.14797] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 01/16/2023]
Abstract
Popillia japonica Newman (Coleoptera: Scarabaeidae) is a highly polyphagous invasive beetle originating from Japan. This insect is highly resilient and able to rapidly adapt to new vegetation. Insect-associated microorganisms can play important roles in insect physiology, helping their hosts to adapt to changing conditions and potentially contributing to an insect's invasive potential. Such symbiotic bacteria can be part of a core microbiota that is stably transmitted throughout the host's life cycle or selectively recruited from the environment at each developmental stage. The aim of this study was to investigate the origin, stability and turnover of the bacterial communities associated with an invasive population of P. japonica from Italy. Our results demonstrate that soil microbes represent an important source of gut bacteria for P. japonica larvae, but as the insect develops, its gut microbiota richness and diversity decreased substantially, paralleled by changes in community composition. Notably, only 16.75% of the soil bacteria present in larvae are maintained until the adult stage. We further identified the micro-environments of different gut sections as an important factor shaping microbiota composition in this species, likely due to differences in pH, oxygen availability and redox potential. In addition, P. japonica also harboured a stable bacterial community across all developmental stages, consisting of taxa well known for the degradation of plant material, namely the families Ruminococcacae, Christensenellaceae and Lachnospiraceae. Interestingly, the family Christensenallaceae had so far been observed exclusively in humans. However, the Christensenellaceae operational taxonomic units found in P. japonica belong to different taxonomic clades within this family.
Collapse
Affiliation(s)
- Bessem Chouaia
- Dipartimento di Scienze Agrarie e Ambientali (DiSAA), Università degli Studi di Milano, 20133, Milan, Italy
| | - Nizar Goda
- Dipartimento di Scienze Agrarie e Ambientali (DiSAA), Università degli Studi di Milano, 20133, Milan, Italy
| | - Giuseppe Mazza
- CREA-DC, Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Centre for Plant Protection and Certification, via di Lanciola 12/A, 50125, Cascine del Riccio, Florence, Italy
| | - Sumer Alali
- Dipartimento di Scienze e politiche ambientali (DESP), Università degli Studi di Milano, 20133, Milan, Italy
| | - Fiorella Florian
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, 34127, Trieste, Italy
| | - Fabrizia Gionechetti
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, 34127, Trieste, Italy
| | - Matteo Callegari
- Dipartimento di Scienze per gli Alimenti, la Nutrizione e l'Ambiente (DeFENS), Università degli Studi di Milano, 20133, Milan, Italy
| | - Elena Gonella
- Dipartimento di Scienze Agrarie, Forestali e Alimentari (DISAFA), Università degli Studi di Torino, 10095, Grugliasco, Italy
| | - Giulia Magoga
- Dipartimento di Scienze Agrarie e Ambientali (DiSAA), Università degli Studi di Milano, 20133, Milan, Italy
| | - Marco Fusi
- Biological and Environmental Sciences and Engineering Division (BESE), Red Sea Research Center (RSRC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Elena Crotti
- Dipartimento di Scienze per gli Alimenti, la Nutrizione e l'Ambiente (DeFENS), Università degli Studi di Milano, 20133, Milan, Italy
| | - Daniele Daffonchio
- Biological and Environmental Sciences and Engineering Division (BESE), Red Sea Research Center (RSRC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Alberto Alma
- Dipartimento di Scienze Agrarie, Forestali e Alimentari (DISAFA), Università degli Studi di Torino, 10095, Grugliasco, Italy
| | - Francesco Paoli
- CREA-DC, Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Centre for Plant Protection and Certification, via di Lanciola 12/A, 50125, Cascine del Riccio, Florence, Italy
| | - Pio Federico Roversi
- CREA-DC, Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Centre for Plant Protection and Certification, via di Lanciola 12/A, 50125, Cascine del Riccio, Florence, Italy
| | - Leonardo Marianelli
- CREA-DC, Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Centre for Plant Protection and Certification, via di Lanciola 12/A, 50125, Cascine del Riccio, Florence, Italy
| | - Matteo Montagna
- Dipartimento di Scienze Agrarie e Ambientali (DiSAA), Università degli Studi di Milano, 20133, Milan, Italy
| |
Collapse
|
19
|
Gao M, Guo B, Zhang L, Zhang Y, Liu Y. Microbial community dynamics in anaerobic digesters treating conventional and vacuum toilet flushed blackwater. WATER RESEARCH 2019; 160:249-258. [PMID: 31152950 DOI: 10.1016/j.watres.2019.05.077] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/06/2019] [Accepted: 05/24/2019] [Indexed: 06/09/2023]
Abstract
Decentralized wastewater treatment represents a promising sustainable option for future wastewater management. Blackwater collected from toilets contains high concentrations of organic matter, ideal for energy recovery using anaerobic digestion. Up-flow anaerobic sludge blanket (UASB) reactors treating conventional toilet (CT, 9 L water per flush) and vacuum toilet (VT, 1 L water per flush) blackwater with increments of loadings were successfully operated to steady state in three phases. The organic loading rates were maintained at comparable levels between the two reactors. The methanisation rates were 0.23-0.29 and 0.41-0.48 gCH4-COD/gfeedCOD in the CT and VT reactors, and the COD removal rates were 72% and 89%, respectively. The enriched microbial consortia and the community dynamics under different loading phases were compared. The rank abundance distributions and alpha-diversity showed that archaeal communities were predominated by mono-enrichments in both CT and VT reactors, while bacterial communities showed lower diversity in the VT reactor. Through principal coordinates analysis (beta-diversity), clear divergences of archaeal and bacterial communities between the CT and VT reactors were revealed, and the archaeal community developed at a slower rate than the bacterial community. The enriched archaea were hydrogenotrophic methanogens, Methanolinea in the CT reactor (56.6%), and Methanogenium in the VT reactor (62.3%). The enriched bacteria were Porphyromonadaceae in both CT (15.9%) and VT (13.4%) reactors, sulfate-reducing bacteria in the CT reactor, and Fibrobacteraceae in the VT reactor (13.8%). Links between enriched consortia and ammonia stress were discussed. Isotope fraction analysis of the biogas showed a slight shift from acetoclastic methanogenesis to hydrogenotrophic methanogenesis. A closer look into the predicted metagenomic functional profiles showed agreeing results, where hydrogenotrophic methanogenesis and fhs gene abundances were higher in the VT reactor. We demonstrated that different blackwater types enriched different microbial consortia, probably due to ammonia concentrations and sulfate loadings, which should be taken into consideration for practical applications.
Collapse
Affiliation(s)
- Mengjiao Gao
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Bing Guo
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Lei Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Yingdi Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada.
| |
Collapse
|
20
|
Awasthi MK, Sarsaiya S, Wainaina S, Rajendran K, Kumar S, Quan W, Duan Y, Awasthi SK, Chen H, Pandey A, Zhang Z, Jain A, Taherzadeh MJ. A critical review of organic manure biorefinery models toward sustainable circular bioeconomy: Technological challenges, advancements, innovations, and future perspectives. RENEWABLE AND SUSTAINABLE ENERGY REVIEWS 2019; 111:115-131. [DOI: 10.1016/j.rser.2019.05.017] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
|
21
|
Nguyen LN, Nguyen AQ, Johir MAH, Guo W, Ngo HH, Chaves AV, Nghiem LD. Application of rumen and anaerobic sludge microbes for bio harvesting from lignocellulosic biomass. CHEMOSPHERE 2019; 228:702-708. [PMID: 31063917 DOI: 10.1016/j.chemosphere.2019.04.159] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/17/2019] [Accepted: 04/21/2019] [Indexed: 06/09/2023]
Abstract
This study investigated the production of biogas, volatile fatty acids (VFAs), and other soluble organic from lignocellulosic biomass by two microbial communities (i.e. rumen fluid and anaerobic sludge). Four types of abundant lignocellulosic biomass (i.e. wheat straw, oaten hay, lurence hay and corn silage) found in Australia were used. The results show that rumen microbes produced four-time higher VFAs level than that of anaerobic sludge reactors, indicating the possible application of rumen microorganism for VFAs generation from lignocellulosic biomass. VFA production in the rumen fluid reactors was probably due to the presence of specific hydrolytic and acidogenic bacteria (e.g. Fibrobacter and Prevotella). VFA production corroborated from the observation of pH drop in the rumen fluid reactors indicated hydrolytic and acidogenic inhibition, suggesting the continuous extraction of VFAs from the reactor. Anaerobic sludge reactors on the other hand, produced more biogas than that of rumen fluid reactors. This observation was consistent with the abundance of methanogens in anaerobic sludge inoculum (3.98% of total microbes) compared to rumen fluid (0.11%). VFA production from lignocellulosic biomass is the building block chemical for bioplastic, biohydrogen and biofuel. The results from this study provide important foundation for the development of engineered systems to generate VFAs from lignocellulosic biomass.
Collapse
Affiliation(s)
- Luong N Nguyen
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia.
| | - Anh Q Nguyen
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Md Abu Hasan Johir
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Wenshan Guo
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Hao Huu Ngo
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Alex V Chaves
- School of Life and Environmental Sciences, The University of Sydney, Sydney, 2006, NSW, Australia
| | - Long D Nghiem
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia; NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam
| |
Collapse
|
22
|
Akyol Ç, Ince O, Bozan M, Ozbayram EG, Ince B. Fungal bioaugmentation of anaerobic digesters fed with lignocellulosic biomass: What to expect from anaerobic fungus Orpinomyces sp. BIORESOURCE TECHNOLOGY 2019; 277:1-10. [PMID: 30654102 DOI: 10.1016/j.biortech.2019.01.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/06/2019] [Accepted: 01/07/2019] [Indexed: 06/09/2023]
Abstract
Energy-efficient biogas reactors are often designed and operated mimicking natural microbial ecosystems such as the digestive tracts of ruminants. Anaerobic fungi play a crucial role in the degradation of lignocellulose-rich fiber thanks to their high cellulolytic activity. Fungal bioaugmentation is therefore at the heart of our understanding of enhancing anaerobic digestion (AD). The efficiency of bioaugmentation with anaerobic fungus Orpinomyces sp. was evaluated in lignocellulose-based AD configurations. Fungal bioaugmentation increased the methane yield by 15-33% during anaerobic co-digestion of cow manure and selected cereal crops/straws. Harvesting stage of the crops was a decisive parameter to influence methane production together with fungal bioaugmentation. A more efficient fermentation process in the bioaugmented digesters was distinguished by relatively-higher abundance of Synergistetes, which was mainly represented by the genus Anaerobaculum. On the contrary, the composition of the methanogenic archaea did not change, and the majority of methanogens was assigned to Methanosarcina.
Collapse
Affiliation(s)
- Çağrı Akyol
- Institute of Environmental Sciences, Boğaziçi University, Bebek, 34342 Istanbul, Turkey
| | - Orhan Ince
- Department of Environmental Engineering, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey.
| | - Mahir Bozan
- Institute of Environmental Sciences, Boğaziçi University, Bebek, 34342 Istanbul, Turkey
| | - E Gozde Ozbayram
- Department of Environmental Engineering, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey
| | - Bahar Ince
- Institute of Environmental Sciences, Boğaziçi University, Bebek, 34342 Istanbul, Turkey
| |
Collapse
|