Variation of volatile fatty acid oxidation and methane production during the bioaugmentation of anaerobic digestion system: Microbial community analysis revealing the influence of microbial interactions on metabolic pathways

2021 ◽  
Vol 754 ◽  
pp. 142425
Author(s):  
Guanjing Cai ◽  
Lixin Zhao ◽  
Tao Wang ◽  
Nan Lv ◽  
Junjie Li ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Microbial Community ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Metabolic Pathways ◽  
Volatile Fatty Acid ◽  
Community Analysis ◽  
Microbial Interactions ◽  
Microbial Community Analysis ◽  
Acid Oxidation

scholarly journals Co-digestion of hybrid Pennisetum and peanut shell after adding TiO2 nanoparticles: Focusing on the synergistic effects on methane production

2021 ◽  
Author(s):  
HongMei Zhao ◽  
Meng Jiang
Keyword(s):  
Microbial Community ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Synergistic Effects ◽  
Community Analysis ◽  
Gas Production ◽  
Microbial Community Analysis ◽  
Peanut Shell ◽  
Hybrid Pennisetum ◽  
Mesophilic Conditions

Abstract Anaerobic digestion is a widely accepted method to treat wastes such as peanut shell. The energy and nutrients are simultaneously recovered by this method. The objective of this study was to elucidate the effect of TiO 2 nanoparticles in co-digestion of hybrid Pennisetum and peanut shell under mesophilic conditions. The results demonstrated the methane (CH 4 ) production was improved by adding the TiO 2 nanoparticles. The cumulative gas production is best (up to 11,133.3 mL) by adding 0.15% nano-TiO 2 particles. The microbial community analysis showed that Methanobacterium and Methanosarcina were enriched in the presence of TiO 2 nanoparticles indicating that TiO 2 can improve CH 4 production by stimulating the growth of methanogens.

scholarly journals Microbial Community Analysis Using MiSeq Sequencing and Pathway of Methane Production in Tehran WWTP: A Full-Scale Anaerobic Digester

2020 ◽  
Author(s):  
Reza Barati Rashvanlou ◽  
Mahdi Farzadkia ◽  
Abbas Ali Moserzadeh ◽  
Asghar Riazati ◽  
Chiang Wei ◽  
...  
Keyword(s):  
Microbial Community ◽  
Methane Production ◽  
Community Analysis ◽  
Full Scale ◽  
Microbial Community Analysis ◽  
Miseq Sequencing ◽  
Sequencing Method ◽  
Community Data ◽  
Rank Abundance ◽  
Made In

Introduction: One of biological wastewater treatment methods that utilizes to both digesting waste activated sludge and methane production is anaerobic digestion (AD). It is believed to be most effective solution in terms of energy crisis and environmental pollution issues. Materials and Methods: In this study the sludge was digested anaerobically sampled from a full-scale WWTP, located at south of Tehran, Iran for evaluation. To study the microbial community within the sludge the MiSeq Sequencing method utilized. Based on our field data (data not shown) and microbial community data, a schematic diagram of probable leading pathways was made in the studied digester. Results: At first, the community variety in the bulk sludge and richness were enhanced followed by loading increasing. Meanwhile, the loading change enhanced the community richness and variety of the sludge. By comparing the rank-abundance distributions, a shallow gradient would show high evenness since the abundances of diverse species are alike. The results showed all the communities were extremely diverse and 15 phyla were distinguished in the sludge sample. The dominant phyla of the community were Bacteroidetes and Firmicutes and quantity of the two phyla were 21% and 11%, respectively. Anaerobaculum, Acinetobacter, Syntrophomonas, and Coprothermobacter were the chief genera for the microbial communities and the sum of four genera were 7%, 3%, 3%, and 2%, respectively. Conclusion: It was shown that syntrophic acetate oxidizing bacterias (SAOBs) metabolized acetate through hydrogen trophic methanogenesis in the digester. Generally, the findings may be useful to help the wastewater operators to utilize an effective method that able to treat waste sludge plus methane production, simultaneously.

Methane production and microbial community analysis in the goethite facilitated anaerobic reactors using algal biomass

Fuel ◽  
2015 ◽  
Vol 145 ◽  
pp. 196-201 ◽  
Author(s):  
Juan Tan ◽  
Jin Wang ◽  
Jun Xue ◽  
Shao-Yang Liu ◽  
Shu-Chuan Peng ◽  
...  
Keyword(s):  
Microbial Community ◽  
Methane Production ◽  
Algal Biomass ◽  
Community Analysis ◽  
Microbial Community Analysis ◽  
Anaerobic Reactors

scholarly journals Succession of microbial community in anaerobic digestion of dairy manure induced by manure-derived biochar

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Hyun Min Jang ◽  
Jeff Brady ◽  
Eunsung Kan
Keyword(s):  
Electron Transfer ◽  
Microbial Community ◽  
Anaerobic Digestion ◽  
Community Analysis ◽  
Dairy Manure ◽  
Microbial Community Analysis ◽  
Methane Yield ◽  
Lag Phase ◽  
Interspecies Electron Transfer ◽  
Syntrophic Bacteria

The present study investigates possible roles of manure-derived biochar (MBC) in anaerobic digestion (AD) of dairy manure. Addition of MBC led to an increase in cumulative methane yield and a decrease in lag phase under all tested conditions (concentration of MBC: 1 and 10 g/L, temperature: 20, 35 and 55°C). For example, the cumulative methane yield in the mesophilic AD with 10 g/L MBC were 24.51% higher than that of the AD without MBC. Additionally, lag phage of mesophilic AD with 10 g/L MBC decreased from 2.08 d to 1.52 d. Microbial community analysis indicated that the addition of MBC to mesophilic and thermophilic AD of dairy manure increased the relative abundance of <i>Ruminofilibacter</i> which related to the hydrolysis. In addition, the addition of MBC to AD potentially stimulated the growth of syntrophic bacteria (e.g., genera Clostridium, Syntrophomonas and Syntrophus) and hydrogenotrophic methanogens (e.g., genera <i>Methanobacterium, Methanolinea</i> and <i>Methanomassiliicoccus</i>). Furthermore, microbial community analysis also suggested that mediate interspecies electron transfer and direct interspecies electron transfer would be accelerated by addition of MBC which showed high electrical conductivity (3230 μS/cm).

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