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Yao Y, Wei Y, Li J, Han R, Jing C, Liu R, Niu Q. Microbial electron flow promotes naphthalene degradation in anaerobic digestion in the presence of nitrate electron acceptor: Focus on electron flow regulation and microbial interaction succession. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132293. [PMID: 37597391 DOI: 10.1016/j.jhazmat.2023.132293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/21/2023]
Abstract
Microbial electron flow (MEF) is produced from microbial degradation of organic compounds. Regulating MEF to promote organic pollutants biodegradation such as naphthalene (Nap) is a potential way but remains a lack of theoretical basis. Here, we regulated MEF by adding electron acceptor NO3- to achieve 2.6 times increase of Nap biodegradation with cyclodextrin as co-metabolism carbon source. With the NO3- addition, the genes inhibited by Nap of electron generation significantly up-regulated. Especially, key genes ubiD and nahD for anaerobic Nap degradation significantly up-regulated respectively 3.7 times and 6.7 times. Moreover, the ability of electron transfer in MEF was also improved consistent with 7.2 times increase of electron transfer system (ETS) activity. Furthermore, total 60 metagenome-assembled genomes (MAGs) were reconstructed through the metagenomic sequencing data with assembly and binning strategies. Interestingly, it was also first found that the Klebsiella MAG. SDU (Shandong University) 14 had the ability of simultaneous Nap biodegradation and denitrification. Our results firstly offered an effective method of regulating MEF to promote polycyclic aromatic hydrocarbons (PAHs) degradation and simultaneous methanogenesis.
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Affiliation(s)
- Yilin Yao
- China-America CRC for Environment & Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Yanhao Wei
- China-America CRC for Environment & Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Jingyi Li
- China-America CRC for Environment & Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Ruotong Han
- China-America CRC for Environment & Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Chuanyong Jing
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Qingdao, Shandong 266237, China
| | - Rutao Liu
- China-America CRC for Environment & Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China; Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Qingdao, Shandong 266237, China; Qingdao Key Laboratory of Marine Pollutant Prevention, Shandong University, Qingdao, Shandong 266237, China.
| | - Qigui Niu
- China-America CRC for Environment & Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China; Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Qingdao, Shandong 266237, China; Qingdao Key Laboratory of Marine Pollutant Prevention, Shandong University, Qingdao, Shandong 266237, China.
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Wei Y, Lan Y, Li X, Gao M, Yuan S, Yuan H. Effect of wheat straw pretreated with liquid fraction of digestate from different substrates on anaerobic digestion performance and microbial community characteristics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 818:151764. [PMID: 34800463 DOI: 10.1016/j.scitotenv.2021.151764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/11/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
The effects of liquid fraction of digestate (LFD) pretreatment on anaerobic digestion (AD) performance and microbial community characteristics were estimated. Prior to AD, LFD (LFDSM, LFDFW, and LFDWS) collected separately from three continuously stirred tank reactors (CSTRs) using swine manure (SM), food waste (FW), and wheat straw (WS) as the mono-substrate was applied to pretreat WS. The results showed that AD with LFD pretreatment resulted in biomethane yields of 240.2-277.9 mL·gVS-1, a 33.57%-54.54% improvement over the yield of the control, and also produced a time saving of 32.26%-46.77%. The pretreatment parameters were optimized for LFD pretreatment. The enhancement effect was in the order of LFDFW > LFDSM > LFDWS. Simultaneously, the cellulose, hemicellulose and lignin contents in the WS and their characteristics (surface properties, crystallinity index, etc.) varied accordingly. The function of the microbial community was strengthened during the pretreatment stage, but the structure of the microbial community had a clear response to the LFD source substrates. Bacteroidetes was the most dominant phyla and was positively correlated with the hydrolysis rate. Consequently, the LFD from the different substrates used as pretreat agents could improve the AD performance of WS.
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Affiliation(s)
- Yufang Wei
- State Key Laboratory of Chemical Resource Engineering, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China; State Environmental Protection Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Yanyan Lan
- Chang'an Communication Technology Co. Ltd., Building 16, TBD Yunji Center, Qibei Road, Changping District, Beijing 110114, PR China
| | - Xiujin Li
- State Key Laboratory of Chemical Resource Engineering, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Minghan Gao
- Qingdao No.58 middle school, Licang District, Qingdao, Shandong 266199, PR China
| | - Shuai Yuan
- Business School, University of Nottingham Ningbo China, Ningbo 315199, PR China
| | - Hairong Yuan
- State Key Laboratory of Chemical Resource Engineering, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
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Microbial Activity during Composting and Plant Growth Impact: A Review. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.1.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Replacing harmful chemical pesticides with compost extracts is steadily gaining attention, offering an effective way for plant growth enhancement and disease management. Food waste has been a major issue globally due to its negative effects on the environment and human health. The methane and other harmful organisms released from the untreated waste have been identified as causes of this issue. Soil bacteria impart a very important role in biogeochemical cycles. The interactions between plants and bacteria in the rhizosphere are some of the factors that determine the health and fertility of the soil. Free-living soil bacteria are known to promote plant growth through colonizing the plant root. PGPR (Plant Growth Promoting Rhizobacteria) inoculants in compost are being commercialized as they help in the improvement of crop growth yield and provide safeguard and resistance to crops from disease. Our focus is to understand the mechanism of this natural, wet waste recycling process and implementation of a sustainable operative adaptation with microbial association to ameliorate the waste recycling system.
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Li J, Yao Y, Shi Y, Tang J, Gadow SI, Liu R, Niu Q. [Bmim]FeCl 4 mediated inhibition and toxicity during anaerobic digestion: Dose-response kinetics, biochar-dependent detoxification and microbial resistance. WATER RESEARCH 2022; 210:117969. [PMID: 34952458 DOI: 10.1016/j.watres.2021.117969] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 12/05/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
[Bmim]FeCl4, or 1‑butyl‑3-methylimidazolium tetrachloroferrate, is a typical ionic liquid (IL). Its recyclable, magnetic, multicomponent, and solvent-free nature makes it a particularly attractive ionic liquid for use in industrial processes. Despite its widespread use, the potential hazards that [Bmim]FeCl4 might pose to the environment, including productive microorganisms, have not been explored. In this study, the dose-response of [Bmim]FeCl4 in anaerobic digestion (AD) was investigated to assess the potential toxification and biochar-dependent detoxification in microbial communities, including enzymatic activity and molecule docking dynamics. Our results showed that methane production (31.52 mLmax/gVS) was sharply inhibited following [Bmim]FeCl4 treatment. Moreover, increasing the dosage of [Bmim]FeCl4 caused more dissolved organic matter (DOM) to be generated. Interestingly, 0.4 g/L of [Bmim]FeCl4 could stimulate the high activity of microbial hydrolase and ATPase. However, a higher concentration of 2.65 g/L prevented these enzymatic processes from continuing. At the cellular level, higher concentration of [Bmim]FeCl4 (>0.4 g/L) increased malondialdehyde (MDA) levels, leading to a higher cell lethal rate and weakening of the secondary structures of protein (especially, the amide I region). At the molecular level, the competitive H-bonding in the active sites caused low activity and consummated more energy. At the community level, structural equation modeling (SEM) revealed that [Bmim]FeCl4 and biochar were the main drivers for microbial community succession. For instance, high [Bmim]FeCl4 (8 g/L) benefited the growth of Clostridium sensu_stricto (from ≤1% to 27%). It is worth mentioning that biochar reversed the inhibition with high α-diversity, which caused a resurgence in the activity of previously inhibited ATPase and hydrolase. H2-trophic methanogens (Methanolinea and Methaofastidisoum) were sensitive to [Bmim]FeCl4 and decreased linearly while acetoclastic methanogens (Methanosaeta) were unchanged. These findings were consistent with the short-term activity tests and further verified by functional analysis.
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Affiliation(s)
- Jingyi Li
- School of Environmental Science and Engineering, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China; China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Yilin Yao
- School of Environmental Science and Engineering, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China; China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Yongsen Shi
- School of Environmental Science and Engineering, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China; China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Jingchun Tang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Samir Ibrahim Gadow
- Agriculture and Biology Research Division, Department of Agricultural Microbiology, National Research Centre, 33 EI Buhouth St., Dokki, Cairo, 12622, Egypt
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China; China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Qigui Niu
- School of Environmental Science and Engineering, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China; China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China.
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Liu J, Zuo X, Peng K, He R, Yang L, Liu R. Biogas and Volatile Fatty Acid Production During Anaerobic Digestion of Straw, Cellulose, and Hemicellulose with Analysis of Microbial Communities and Functions. Appl Biochem Biotechnol 2022; 194:762-782. [PMID: 34524637 DOI: 10.1007/s12010-021-03675-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 09/08/2021] [Indexed: 10/20/2022]
Abstract
The anaerobic digestion efficiency and methane production of straw was limited by its complex composition and structure. In this study, rice straw (RS), cellulose, and hemicellulose were used as raw materials to study biogas production performance and changes in the volatile fatty acids (VFAs). Further, microbial communities and genetic functions were analyzed separately for each material. The biogas production potential of RS, cellulose, and hemicellulose was different, with cumulative biogas production of 283.75, 412.50, and 620.64 mL/(g·VS), respectively. The methane content of the biogas produced from cellulose and hemicellulose was approximately 10% higher than that produced from RS after the methane content stabilized. The accumulation of VFAs occurred in the early stage of anaerobic digestion in all materials, and the cumulative amount of VFAs in both cellulose and hemicellulose was relatively higher than that in RS, and the accumulation time was 12 and 14 days longer, respectively. When anaerobic digestion progressed to a stable stage, Clostridium was the dominant bacterial genus in all three anaerobic digestion systems, and the abundance of Ruminofilibacter was higher during anaerobic digestion of RS. Genetically, anaerobic digestion of all raw materials proceeded mainly via aceticlastic methanogenesis, with similar functional components. The different performance of anaerobic digestion of RS, cellulose, and hemicellulose mainly comes from the difference of composition of raw materials. Increasing the accessibility of cellulose and hemicellulose in RS feedstock by pretreatment is an effective way to improve the efficiency of anaerobic digestion. Since the similar microbial community structure will be acclimated during anaerobic digestion, there is no need to adjust the initial inoculum when the accessibility of cellulose and hemicellulose changes.
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Affiliation(s)
- Jie Liu
- Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, People's Republic of China
| | - Xiaoyu Zuo
- Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, People's Republic of China.
| | - Ke Peng
- Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, People's Republic of China
| | - Rui He
- Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, People's Republic of China
| | - Luyao Yang
- Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, People's Republic of China
| | - Rufei Liu
- China Urban Construction Design & Research Institute, No.36, Deshengmenwai Street, Beijing, China
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Yadav M, Joshi C, Paritosh K, Thakur J, Pareek N, Masakapalli SK, Vivekanand V. Reprint of:Organic waste conversion through anaerobic digestion: A critical insight into the metabolic pathways and microbial interactions. Metab Eng 2022; 71:62-76. [DOI: 10.1016/j.ymben.2022.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 11/17/2021] [Accepted: 11/30/2021] [Indexed: 12/25/2022]
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Yuan Z, Xu W, He Z, Shen H. Poplar Sawdust Stack Self-Heating Properties and Variations of Internal Microbial Communities. MATERIALS 2022; 15:ma15031114. [PMID: 35161059 PMCID: PMC8840308 DOI: 10.3390/ma15031114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/20/2022] [Accepted: 01/26/2022] [Indexed: 11/16/2022]
Abstract
The heat accumulation generated by microbial metabolic activities during the storage of the sawdust may lead to spontaneous combustion accidents. This paper studied the Critical Ambient Temperature (CAT) variation of poplar sawdust at different stack dimensions and investigated the physicochemical properties as well as microbial community dynamics during the self-heating process of poplar sawdust stacks. From the self-heating substances test experiments and Frank-Kamenetskii (FK) theory, it was found that the CAT of poplar sawdust stacks would decrease from 158.27 °C to 102.46 °C with the increase of stack size from 0.1 m to 3.2 m. From the sawdust stack self-heating experiments, microbial metabolic activities were enhanced with the increasing moisture content (by watering) and oxygen (by turning over), which led to a remarkable increase of the sawdust stack temperature and the rapid decomposition of biochemical components (especially cellulose and hemicellulose). From the microbiological community analysis, at the thermophilic stage (around 60 °C, large amounts of heat release in compost bin), the existence of thermostable bacteria (such as Brevibacillus thermoruber, Bacillus thermoamylovorans and Paenibacillus barengoltzii belonging to Firmicutes) played an important role in degrading organic substances. The heat generated by the microbial metabolic activities might lead to spontaneous combustion eventually if sawdust stack is large enough. Therefore, the sawdust should be stacked in a cool and dry area while avoiding large amounts of storage in high humidity environments.
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Affiliation(s)
- Zitao Yuan
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control & Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; (W.X.); (Z.H.)
- Correspondence: (Z.Y.); (H.S.)
| | - Wenbin Xu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control & Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; (W.X.); (Z.H.)
| | - Zili He
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control & Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; (W.X.); (Z.H.)
| | - Hao Shen
- Guangdong Provincial Key Laboratory of Fire Science and Technology, School of Intelligent Systems Engineering, Sun Yat-sen University, Guangzhou 510006, China
- Correspondence: (Z.Y.); (H.S.)
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Shi Y, Liu M, Li J, Yao Y, Tang J, Niu Q. The dosage-effect of biochar on anaerobic digestion under the suppression of oily sludge: Performance variation, microbial community succession and potential detoxification mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126819. [PMID: 34396960 DOI: 10.1016/j.jhazmat.2021.126819] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/09/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
This study investigated the dosage-effect of biochar on the suppressed mesophilic digestion of oily sludge (OS) containing naphthalene (recalcitrant compound) and starch (easily bioavailable substrate). Methanogenesis was inhibited in control with OS, where biomethane yield (63.33 mL/gVS) was obviously lower than theoretical yield (260.55 mL/gVS). With adding optimal dose of biochar (0.60 g/gVS OS), the highest CH4 yield (138.41 mL/gVS) was 2.19 times of control. Meanwhile, the efficiencies of hydrolysis, acidogenesis and acetogenesis were significantly enhanced. However, excessive biochar (4.80 g/gVS OS) caused negative effects with methanogenic efficiency diminished by 32.5% and lag phase prolonged by 5.72 h. Dissolved organic matter (DOM) analysis showed that humic acid-like and fulvic acid-like components percentages of fluorescence regional integration were decreased because of the adsorption of biochar. In addition, biochar mediating interspecies electron transfer selectively enriched electroactive fermentation bacteria (Clostridium and Bacteroides) and acetoclastic Methanosaeta, which was responsible for promoting mesophilic digestion performance. The functional genes related to metabolism and environmental information processing were potentially activated by biochar. Above results indicate that moderate biochar application may mitigate the bio-toxicity suppression of OS, which help to provide a promising pathway for reinforcing oily wastes bio-treatment.
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Affiliation(s)
- Yongsen Shi
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 26623, China
| | - Manli Liu
- Shandong Experimental High School, 73 Jingqi Rd, Jinan, Shandong 250001, China
| | - Jingyi Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 26623, China
| | - Yilin Yao
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 26623, China
| | - Jingchun Tang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, 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 26623, China.
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Shi Y, Fang H, Li YY, Wu H, Liu R, Niu Q. Single and simultaneous effects of naphthalene and salinity on anaerobic digestion: Response surface methodology, microbial community analysis and potential functions prediction. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 291:118188. [PMID: 34547659 DOI: 10.1016/j.envpol.2021.118188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/27/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are a persistent and prevalent class of pollutants in petroleum-contaminated saline environment, which pose potential harm to organisms. Researches on anaerobic biodegradation of PAHs are gradually emerging, but the response of anaerobic microorganisms to salinity changes and the co-effects of salinity and PAHs in anaerobic digestion (AD) system have seldom been reported. Thus, we investigated the variations of AD system performance and anaerobic microbial community caused by different concentrations of naphthalene (Nap) or/and NaCl based on Box-Behnken Design (0 mg/L ≤ Nap ≤150 mg/L, 0 g/L ≤ NaCl ≤25 g/L). The promoted efficiencies of acidogenesis and methanogenesis were found in presence of moderate NaCl or Nap, but high salinity (NaCl >4.4 g/L) weakened AD performance. Moreover, the high salinity (NaCl >4.4 g/L) and Nap resulted in reduced microbial Ca2+ Mg2+- ATPase activity, poor EPS secretion and the highest difference of the microbial operational taxonomic units (OTUs), and synergistically inhibited AD process. Microbiological analysis revealed that the relative abundance of Clostridium and acetoclastic Methanosaeta was increased by 2.01 times and 2.17 times in single Nap treated group compared to control. With the simultaneous addition of NaCl and Nap, Proteiniphilum and hydrogenotrophic methanogens (Methanobacterium, Methanofollis, and Methanolinea) occupied the major abundance. Potential functions prediction indicated that high salinity could disrupt the co-metabolism between carbohydrate metabolism and Nap degradation. This study provides basis for anaerobic bioremediation of PAHs-polluted saline environment.
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Affiliation(s)
- Yongsen Shi
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Hongli Fang
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Hanyang Wu
- Jiangxi Bocent Advanced Ceramic Environmental Technology Co., Ltd, Pingxiang, 337000, Jiangxi Province, China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Qigui Niu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China.
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10
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Organic waste conversion through anaerobic digestion: A critical insight into the metabolic pathways and microbial interactions. Metab Eng 2021; 69:323-337. [PMID: 34864213 DOI: 10.1016/j.ymben.2021.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 11/17/2021] [Accepted: 11/30/2021] [Indexed: 11/23/2022]
Abstract
Anaerobic digestion is a promising method for energy recovery through conversion of organic waste to biogas and other industrial valuables. However, to tap the full potential of anaerobic digestion, deciphering the microbial metabolic pathway activities and their underlying bioenergetics is required. In addition, the behavior of organisms in consortia along with the analytical abilities to kinetically measure their metabolic interactions will allow rational optimization of the process. This review aims to explore the metabolic bottlenecks of the microbial communities adopting latest advances of profiling and 13C tracer-based analysis using state of the art analytical platforms (GC, GC-MS, LC-MS, NMR). The review summarizes the phases of anaerobic digestion, the role of microbial communities, key process parameters of significance, syntrophic microbial interactions and the bottlenecks that are critical for optimal bioenergetics and enhanced production of valuables. Considerations into the designing of efficient synthetic microbial communities as well as the latest advances in capturing their metabolic cross talk will be highlighted. The review further explores how the presence of additives and inhibiting factors affect the metabolic pathways. The critical insight into the reaction mechanism covered in this review may be helpful to optimize and upgrade the anaerobic digestion system.
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Seasonal Dynamics of Bathyarchaeota-Dominated Benthic Archaeal Communities Associated with Seagrass (Zostera japonica) Meadows. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2021. [DOI: 10.3390/jmse9111304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Little is known about the seasonal dynamic of archaeal communities and their potential ecological functions in temperate seagrass ecosystems. In this study, seasonal changes in diversity, community structure, and potential metabolic functions of benthic archaea in surface sediments of two seagrass meadows along the northern Bohai Sea in China were investigated using Miseq sequencing of the 16S rRNA gene and Tax4Fun2 functional prediction. Overall, Crenarchaeota (mainly Bathy-15, Bathy-8, and Bathy-6) dominated, followed by Thermoplasmatota, Asgardarchaeota, and Halobacterota, in terms of alpha diversities and relative abundance. Significant seasonal changes in the entire archaeal community structure were observed. The major phyla Methanobacteria, Nitrosopumilales, and genus Methanolobus had higher proportions in spring, while MBG-D and Bathyarchaeota were more abundant in summer and autumn, respectively. Alpha diversities (Shannon and Simpson) were the highest in summer and the lowest in autumn (ANOVA test, p < 0.05). Salinity, total organic carbon, and total organic nitrogen were the most significant factors influencing the entire archaeal community. Higher cellulose and hemicellulose degradation potentials occurred in summer, while methane metabolism potentials were higher in winter. This study indicated that season had strong effects in modulating benthic archaeal diversity and functional potentials in the temperate seagrass ecosystems.
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12
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Cai Y, Gallegos D, Zheng Z, Stinner W, Wang X, Pröter J, Schäfer F. Exploring the combined effect of total ammonia nitrogen, pH and temperature on anaerobic digestion of chicken manure using response surface methodology and two kinetic models. BIORESOURCE TECHNOLOGY 2021; 337:125328. [PMID: 34120063 DOI: 10.1016/j.biortech.2021.125328] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 06/12/2023]
Abstract
Ammonia inhibition is the most challenging issue in the anaerobic digestion (AD) of nitrogen-rich substrates. Total ammonia nitrogen (TAN) concentration, temperature and pH are the main operational parameters affecting the chemical equilibrium between free ammonium nitrogen (NH3; FAN) and ammonium ions (NH4+). However, it is still unclear how these parameters together affect digestion performance by influencing this equilibrium. To determine the effect and linkages of these parameters, a Box-Behnken design-response surface methodology (RSM), correlation analysis and two kinetic models were carried out. The results revealed that the linear effect of TAN, the interaction effect between TAN and temperature, and temperature and pH were significant, however, the quadratic effect of TAN, temperature and pH were also significant. Furthermore, TAN and temperature were positively correlated with Mmax, k and Rmax. Findings from this study could provide a theoretical basis to develop the way of relieving ammonia inhibition.
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Affiliation(s)
- Yafan Cai
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany; School of Chemical Engineering, Zhengzhou University, Kexue Dadao 100, 450001 Zhengzhou, China; College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Daniela Gallegos
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany
| | - Zehui Zheng
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Walter Stinner
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany; Sino-German Biomass Research Center Anhui (C-DBFZ Anhui), Hefei University, Jinxiu Dadao 99, 230601 Hefei, PR China
| | - Xiaofen Wang
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Jürgen Pröter
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany
| | - Franziska Schäfer
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany.
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13
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Ling Z, Thakur N, El-Dalatony MM, Salama ES, Li X. Protein biomethanation: insight into the microbial nexus. Trends Microbiol 2021; 30:69-78. [PMID: 34215486 DOI: 10.1016/j.tim.2021.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 06/08/2021] [Accepted: 06/08/2021] [Indexed: 01/01/2023]
Abstract
Biomethanation of carbohydrates (e.g., lignocellulosic biomass) and lipids (e.g., waste oils) has been well studied. However, investigations on the biomethanation of protein-rich biowastes (PRBs) and associated microbial communities have not been reported. This review summarizes the challenges in the metabolic process of anaerobic digestion of PRBs and the microbial instability associated with it. We discuss the diversity of bacterial and archaeal communities via metagenomics under PRB mono- and codigestion. A stable community structure with enhanced metabolic activity is a core factor in PRB biomethanation. The application of strategies such as codigestion of PRBs with carbon-rich biomass and microbial stimulation/augmentation would make PRB biomethanation more feasible.
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Affiliation(s)
- Zhenmin Ling
- MOE, Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou 730000, Gansu Province, PR China
| | - Nandini Thakur
- MOE, Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou 730000, Gansu Province, PR China; Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu Province, PR China
| | - Marwa M El-Dalatony
- MOE, Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou 730000, Gansu Province, PR China
| | - El-Sayed Salama
- Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu Province, PR China.
| | - Xiangkai Li
- MOE, Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou 730000, Gansu Province, PR China.
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14
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Pasalari H, Gholami M, Rezaee A, Esrafili A, Farzadkia M. Perspectives on microbial community in anaerobic digestion with emphasis on environmental parameters: A systematic review. CHEMOSPHERE 2021; 270:128618. [PMID: 33121817 DOI: 10.1016/j.chemosphere.2020.128618] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/09/2020] [Accepted: 10/11/2020] [Indexed: 05/07/2023]
Abstract
This paper review is aiming to comprehensively identify and appraise the current available knowledge on microbial composition and microbial dynamics in anaerobic digestion with focus on the interconnections between operational parameters and microbial community. We systematically searched Scopus, Web of Science, pubmed and Embase (up to August 2019) with relative keywords to identify English-language studies published in peer-reviewed journals. The data and information on anaerobic reactor configurations, operational parameters such as pretreatment methods, temperature, trace elements, ammonia, organic loading rate, and feedstock composition and their association with the microbial community and microbial dynamics were extracted from eligible articles. Of 306 potential articles, 112 studies met the present review objectives and inclusion criteria. The results indicated that both aceticlastic and hydrogenotrophic methanogenesis are dominant in anaerobic digesters and their relative composition is depending on environmental conditions. However, hydrogenotrophic methanogens are more often observed in extreme conditions due to their higher robustness compared to aceticlastic methangoens. Firmicutes and Bacteroidetes phyla are most common fermentative bacteria of the acidogenic phase. These bacteria secrete lytic enzymes to degrade organic matters and are able to survive in extreme conditions and environments due to their spores. In addition, among archaea Methanosaeta, Methanobacterium, and Methanosarcinaceae are found at high relative abundance in anaerobic digesters operated with different operational parameters. Overall, understanding the shifts in microbial composition and diversity as results of operational parameters variation in anaerobic digestion process would improve the stability and process performance.
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Affiliation(s)
- Hasan Pasalari
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR, Iran
| | - Mitra Gholami
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR, Iran
| | - Abbas Rezaee
- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ali Esrafili
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR, Iran
| | - Mahdi Farzadkia
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, IR, Iran.
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Ma J, Chen F, Xue S, Pan J, Khoshnevisan B, Yang Y, Liu H, Qiu L. Improving anaerobic digestion of chicken manure under optimized biochar supplementation strategies. BIORESOURCE TECHNOLOGY 2021; 325:124697. [PMID: 33461122 DOI: 10.1016/j.biortech.2021.124697] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/02/2021] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
Anaerobic digestion of chicken manure was carried out in this study basing on central composite design to identify the most optimal strategy for biochar supplementation. Model of cumulative methane production (CMP) was established by using response surface methodology. The optimal conditions predicted accordingly, including manure loading of 51.8 g VS/L, biochar dosage of 3.3% VSmanure, and cellulose loading of 98.0 g VS/L, were expected to maximize CMP, i.e., 294 mL/g VSmanure. The results also demonstrated that biochar dosage and its interaction with manure loading were key factors with significant impact on CMP. Biochar dosage higher than 3.5% VSmanure was observed to weaken the transformation of organic substances to methane. Higher dosage of biochar could considerably reduce concentration of organic acids, total ammonia nitrogen, as well as soluble salts. Verification experiment supported validity of the optimal strategy and provided data for cost assessment, which showed positive cost balances from biochar supplementation.
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Affiliation(s)
- Junyi Ma
- Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Fengfen Chen
- Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shuaixing Xue
- Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Junting Pan
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Benyamin Khoshnevisan
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yadong Yang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Hongbin Liu
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Ling Qiu
- Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
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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%.
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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.
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17
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Zheng Z, Cai Y, Zhang Y, Zhao Y, Gao Y, Cui Z, Hu Y, Wang X. The effects of C/N (10-25) on the relationship of substrates, metabolites, and microorganisms in "inhibited steady-state" of anaerobic digestion. WATER RESEARCH 2021; 188:116466. [PMID: 33027695 DOI: 10.1016/j.watres.2020.116466] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/04/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
The carbon/nitrogen ratio (C/N) is a key parameter that affects the performance of anaerobic digestion (AD). Recent AD research has focused on optimizing the C/N of feedstock. The so-called "inhibited steady-state" refers to a special state of ammonia inhibition of AD that often occurs at low-C/N (below 25) when degradable nitrogen-rich substrates, such as livestock manure, are used as feedstock. However, the mechanism behind the "inhibited steady-state" is still unknown. In the current study, co-digestion and recirculation were used to create a C/N gradient in the influent to explore the relationship between substrates, metabolites, and microorganisms in the "inhibited steady-state." Data were collected at the macro, microbial, and genetic levels. Three CSTRs were successfully made run into the "inhibited steady-state" using influent C/Ns of 10-12. Digestion performance levels of R10-R12 were low and stable, transitioning from an aceticlastic methane-producing pathway to a hydrogenotrophic pathway as the C/N gradually decreased. As the abundance of the hydrogenophilic methanogens increased, the abundance of syntrophic acetate-oxidizing bacteria (SAOB) also increased. The succession between populations of Methanosaeta and Methanosarcina may be used as a microbiological indicator of ammonia inhibition. Under high-C/Ns, cooperation among bacteria was high, while under low-C/Ns, competition among bacteria was high. These results clarify the processes underlying the "inhibited steady-state," which is a condition often faced in actual large-scale biogas facilities that use degradable nitrogen-rich substrates. Moreover, practical guidelines for evaluating ammonia inhibition are provided, and strategies to alleviate ammonia suppression are developed.
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Affiliation(s)
- Zehui Zheng
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Yafan Cai
- Department of Biochemical conversion, Deutsches Biomassforschungszentrum gemeinnütziges GmbH, Torgauer Straße116, 04347 Leipzig, Germany.
| | - Yue Zhang
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Yubin Zhao
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Youhui Gao
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Zongjun Cui
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Yuegao Hu
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Xiaofen Wang
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China.
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18
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Zhao S, Li P, Fang H, Song L, Li D, Liu R, Niu Q. Enhancement methane fermentation of Enteromorpha prolifera waste by Saccharomyces cerevisiae: batch kinetic investigation, dissolved organic matter characterization, and synergistic mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:16254-16267. [PMID: 32124286 DOI: 10.1007/s11356-020-08013-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 02/05/2020] [Indexed: 05/27/2023]
Abstract
With the invasion of green tide, there were millions of tons of Enteromorpha prolifera (Enteromorpha) that need to be disposed of. An efficient microecological system for Enteromorpha fermentation was constructed using Saccharomyces cerevisiae (S. cerevisiae) and granular sludge at mesophilic condition (35 °C). In order to investigate the influence of S. cerevisiae dosage on fermentation, biomethane production and variations in dissolved organic matter (DOM) were investigated. The results indicated that the microecosystem with added S. cerevisiae exhibited improved fermentation capacity. Specifically, biomethane production was improved by 18%, with a maximum methane yield of 331 mL/g VS, and the time required to reach 90% methane yield was reduced by 41%. There were positive linear relationships between S. cerevisiae dosage and the efficiency of hydrolysis, acidogenesis, acetogenesis, and methanogenesis (R2 > 0.9). According to theoretical calculations, there was a positive effect of lower S. cerevisiae dosage (less than 0.93 g/g TS) on biomethane production, and excess dosage (more than 0.93 g/g TS) led to a negative effect due to volatile fatty acid (VFA) accumulation. The excitation-emission matrix (EEM) indicated that the humification index (HIX) and fulvic acid (FA) percentage of fluorescence regional integration in the system were decreased because the quinone and ketone groups of the FA accepted electrons from S. cerevisiae. These findings suggested that this microecosystem can accelerate fermentation speed (41%) and increase biomethane output (18.2%). The synergistic effect of Enteromorpha fermentation with Saccharomyces cerevisiae addition.
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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, 266237, Shandong, People's Republic of China
| | - Ping Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, 266237, Shandong, People's Republic of 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, 266237, Shandong, People's Republic of China
| | - Liuying Song
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, 266237, Shandong, People's Republic of China
| | - Dunjie Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, 266237, Shandong, People's Republic of 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, 266237, Shandong, People's Republic of 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, 266237, Shandong, People's Republic of China.
- Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, 214122, People's Republic of China.
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Chu D, Ye ZL, Chen S. Interactions among low-molecular-weight organics, heavy metals, and Fe(III) during coagulation of landfill leachate nanofiltration concentrate. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 104:51-59. [PMID: 31962217 DOI: 10.1016/j.wasman.2020.01.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/08/2020] [Accepted: 01/11/2020] [Indexed: 06/10/2023]
Abstract
The generation of landfill leachate nanofiltration concentrate (LLNC) has been a dilemma for leachate treatment plants because it contains large amounts of refractory organics with low molecular weight (LMWO), as well as heavy metals (HMs), and is difficult to handle. The coagulation removal of LMWOs is a significant challenge, as is the removal of HMs bonded to LMWOs. In this study, coagulation through the dosing of FeCl3 was used to remove LMWOs and HMs from LLNC. The results interestingly demonstrated that the removal rates of dissolved organic carbon (DOC), Cr, Ni, and As reached up to 84.1% ± 3.9%, 91.0 ± 1.1%, 73.1 ± 2.2%, and 96.9 ± 1.5%, respectively. The partition of LMWO components, as well as the interactions among the LMWOs, HMs, and Fe(III) were investigated to determine the mechanism behind the LMWO and HM removal. LMWOs with a high degree of humification, including humic and fulvic acid-like components, were preferentially removed through aggregation and electrostatic attraction originating from the specialistic adsorption of Fe2(OH)24+ and Fe3(OH)45+. In addition to being removed, a portion of these two components was dissociated into aromatic protein I, aromatic protein II, and soluble microbial by-product-like materials due to an acid effect and the formation of inner-sphere complexes. A redundancy analysis revealed that As, Cr, and Ni are mainly removed through the electrostatic attraction of Fe(III), bonding to humic substances and hydrophilic organics, respectively. The outcomes provide a new understanding on the coagulation removal of LMWOs and HMs.
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Affiliation(s)
- Dongyuan Chu
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, No. 1799 Jimei Road, Xiamen City, Fujian 361021, China; University of Chinese Academy of Sciences, No. 19 (A) Yuquan Road, Beijing 100049, China.
| | - Zhi-Long Ye
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, No. 1799 Jimei Road, Xiamen City, Fujian 361021, China.
| | - Shaohua Chen
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, No. 1799 Jimei Road, Xiamen City, Fujian 361021, China.
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20
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The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2019.07.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Ma J, Pan J, Qiu L, Wang Q, Zhang Z. Biochar triggering multipath methanogenesis and subdued propionic acid accumulation during semi-continuous anaerobic digestion. BIORESOURCE TECHNOLOGY 2019; 293:122026. [PMID: 31449922 DOI: 10.1016/j.biortech.2019.122026] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/14/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
The semi-continuous anaerobic digestion (AD) performances of dry chicken manure (DCM) were investigated at the temperature of 35 ± 1 °C with and without biochar. The average specific methane productions of 0.18 L/g VSadded and 0.17 L/g VSadded were achieved without biochar at the organic loading rate (OLR) of 3.125 and 6.25 g VS/L/d, respectively. An increase of 12% in methane production was obtained in the presence of biochar at the two operational OLRs. Accumulation of propionic acid was observed associating with AD of DCM, which was substantially alleviated by biochar supplement. The buffer capacity of biochar was supposed to develop through strengthening the buffer system established by NH4+ and volatile fatty acids. Methanosarcina that can utilize multiple nutrients for methanogenesis was the dominant archaea in the presence of biochar, while the strictly aceticlastic Methanosaeta was dominant in control digester. These results suggest that biochar enhanced methanogenesis through intensifying its available pathway.
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Affiliation(s)
- Junyi Ma
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Junting Pan
- Key Laboratory of Non-point Source Pollution of Ministry of Agricultural and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Ling Qiu
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Quan Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
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22
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Zheng X, Yuan D, Li Y, Liu C. Exploration of the reduction mechanism of Cr(VI) in anaerobic hydrogen fermenter. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 254:113042. [PMID: 31454583 DOI: 10.1016/j.envpol.2019.113042] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 07/24/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
The bio-reduction of hexavalent chromium (Cr(VI)) by anaerobic fermentation is considered as a promising, low-cost and environment-friendly way. However, it is unclear for the reduction mechanisms of Cr(VI) in an anaerobic hydrogen fermenter, such as reduction kinetics, related electron donors, migration and transformation, reduction site and key components, and related microorganisms. To clarify these issues, a hydrogen fermenter was designed to reduce Cr(VI) at 55 °C with glucose as initial substrate. Results show that 100 mg/L Cr(VI) can be completely reduced (99.5%) to trivalent chromium (Cr(III) through chemical and biological reactions. Bio-reduction dominates Cr(VI) removal in a first-order exponential decay mode with both glucose and its metabolites (volatile fatty acids) as electron donors. Moreover, volatile fatty acids are more suitable as electron donors for Cr(VI) bio-reduction than glucose. Bacilli, Clostridia and Thermotogae in the fermenter dominated the reduction of Cr(VI) by regulating the production and composition of extracellular polymers (EPSs), in which carboxyl and hydroxyl groups play an important role for Cr(VI) reduction by coordination. The results can guide us to regulate the bio-reduction of Cr(VI), and provide reference for the development of bio-reduction technology of Cr(VI).
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Affiliation(s)
- Xin Zheng
- 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
| | - Dong Yuan
- Department of Chemistry and Chemical Engineering, Qilu Normal University, Shandong Province, 36# Lishan Road, Jinan 250013, PR China
| | - Youxuan Li
- 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
| | - Chunguang 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; Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, PR China.
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Zhang J, Lu T, Wang Z, Wang Y, Zhong H, Shen P, Wei Y. Effects of magnetite on anaerobic digestion of swine manure: Attention to methane production and fate of antibiotic resistance genes. BIORESOURCE TECHNOLOGY 2019; 291:121847. [PMID: 31357044 DOI: 10.1016/j.biortech.2019.121847] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/16/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
Effects of magnetite on methane production and fate of antibiotic resistance genes (ARGs) during anaerobic digestion (AD) of swine manure were investigated. Results showed that methane production was increased by maximum 16.1%, and magnetite could enhance the acetoclastic methanogenesis not hydrogenotrophic methanogenesis reflected by the functional gene quantification and microbial community analysis. The propionate degradation rate was improved, and it was syntrophic oxidized into H+/e-/CO2 for direct interspecies electron transfer (DIET) and acetate, where DIET was further enhanced by magnetite and the acetate was transformed into methane through syntrophic acetate oxidation (SAO) pathway. Magnetite mainly influenced the ARGs at the interim period of AD, where ARGs especially ermF were significantly enriched. Magnetite did not influence the total ARGs abundance at the end, although the tetM was enriched and mefA was reduced finally. Statistical analysis indicated that magnetite influenced the ARGs fate mainly through the changes of microbial community.
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Affiliation(s)
- Junya Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tiedong Lu
- College of Life Science and Technology, Guangxi University, Nanning 530005, Guangxi, China
| | - Ziyue Wang
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Yawei Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Zhong
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peihong Shen
- College of Life Science and Technology, Guangxi University, Nanning 530005, Guangxi, China
| | - Yuansong Wei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Li D, Song L, Fang H, Li P, Teng Y, Li YY, Liu R, Niu Q. Accelerated bio-methane production rate in thermophilic digestion of cardboard with appropriate biochar: Dose-response kinetic assays, hybrid synergistic mechanism, and microbial networks analysis. BIORESOURCE TECHNOLOGY 2019; 290:121782. [PMID: 31326650 DOI: 10.1016/j.biortech.2019.121782] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/07/2019] [Accepted: 07/08/2019] [Indexed: 06/10/2023]
Abstract
The effect of biochar on the thermophilic digestion of mono-cardboard was investigated. Compared with control group (T0), the maximum rate of biomethane production was significantly improved after the addition of biochar, especially, it has been improved by 40.6% in T1 (0.77 g/gTS sludge) with the methane production of 89.28 mL/gVS. Also, the addition of biochar improved the efficiency of acidogenesis and acetogenesis. However, adverse effects were observed with the biomethane production decreased by 33.98% and the lag phase extended by 35 h in T5 (3.86 g/gTS sludge). Especially, the results showed that the adsorption of biochar played important roles in digestion. In addition, acetoclastic Methanosaeta which considered to be involved in interspecific electron transfer (IET) was enriched after biochar added and the highest diversity of acetogens was obtained in T1. Oppositely, microbial networks analysis showed that the excessive biochar may destroy the diversity of microorganism drastically.
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Affiliation(s)
- Dunjie Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province 266237, PR China
| | - Liuying Song
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province 266237, PR China
| | - Hongli Fang
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province 266237, PR China
| | - Ping Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province 266237, PR China
| | - Yue Teng
- Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province 266237, PR China
| | - Qigui Niu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province 266237, PR China.
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Song L, Li D, Fang H, Cao X, Liu R, Niu Q, Li YY. Revealing the correlation of biomethane generation, DOM fluorescence, and microbial community in the mesophilic co-digestion of chicken manure and sheep manure at different mixture ratio. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:19411-19424. [PMID: 31073832 DOI: 10.1007/s11356-019-05175-1] [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: 01/29/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
Batch co-digestion tests of chicken manure (CM) and sheep manure (SM) at different ratio (Rs/c) were conducted under mesophilic condition (35 °C). Batch kinetic analysis of bioCH4 production, excitation-emission matrix (EEM) fluorescence of dissolved organic matter (DOM), and microbial community were investigated. The well-fitted modified Gompertz model (R2, 0.98-0.99) resulted that the co-digestion markedly improved the methane production rate and shortened the lag phase time. The highest bioCH4 yield of 219.67 mL/gVSadd and maximum production rate of 0.378 mL/gVSadd/h were obtained at an optimum Rs/c of 0.4. Additionally, a significant variation of DOM was detected at the Rs/c of 0.4 with a consistent degradation of soluble microbial byproduct-like and protein-like organics. The positive synergy effects of co-digestion conspicuously enhanced the bioCH4 production efficiency. FI370 and NADH were significantly correlated to Rs/c (p < 0.05). Moreover, the correlations among process indicator, EEM-peaks and different environmental parameters were evaluated by Pearson correlation analysis. The high diversity of acetoclastic methanogens and hydrogenotrophic methanogens in the co-digestion improved the stability of process. Graphical Abstract.
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Affiliation(s)
- Liuying Song
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of China
| | - Dunjie Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of 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, People's Republic of China
| | - Xiangyunong Cao
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of 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, People's Republic of 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, People's Republic of China.
- Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
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Song L, Li D, Cao X, Tang Y, Liu R, Niu Q, Li YY. Optimizing biomethane production of mesophilic chicken manure and sheep manure digestion: Mono-digestion and co-digestion kinetic investigation, autofluorescence analysis and microbial community assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 237:103-113. [PMID: 30780051 DOI: 10.1016/j.jenvman.2019.02.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 01/29/2019] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
Optimization of mesophilic methane production from Chicken manure (CM) and Sheep manure (SM) at total solid (TS) of 8% and 1.6% were obtained by sequence tests in mono-digestion. However, the positive synergy of co-digestion with an optimum CM/SM of 2.5 (310 mLCH4/gVSadded) resulted in a high hydrolytic capacity and methane production. The modified Gompertz model (R2 > 0.98) and modified Aiba model (R2 > 0.88) illustrated co-digestion significantly improved the methane generation rate with strong ammonia tolerance. Dissolved Organic Matter (DOM) variation in response to the metabolic rate of microbial community illustrated that the SMP-like and protein-like components half-split by EEM-PARAFAC were significantly negative corresponded to bio-methane production. Moreover, the canonical correlation analysis (CCA) resulted a significant difference between the substrate and DOM composition. Potential functional metabolic illustrated statistically significance difference between mono and co-digestion, however, Methanosaeta and Syntrophobacter predominated the syntrophic methanogenesis. The constructed complex metabolic cooperation caused the co-digestion stable and high efficiency.
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Affiliation(s)
- Liuying Song
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Dunjie Li
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Xiangyunong Cao
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Yu Tang
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Qigui Niu
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology (Jiangnan University), Wuxi, 214122, PR China.
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
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