Comparison of two advanced anaerobic digestions of sewage sludge with high-temperature thermal pretreatment and low-temperature thermal-alkaline pretreatment

Xiao, Benyi; Tang, Xinyi; Hao, Yi; Dong, Lixin; Han, Yizhuo; Liu, Junxin

doi:10.1016/j.biortech.2020.122979

Cited by 49 publications

(6 citation statements)

References 38 publications

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“…In addition, Methanosarcina had a high relative abundance of 7.8-9.5% in the PV samples. Methanosarcina is a multifunctional methanogenic archaea capable of utilizing acetic acid, H 2 /CO 2 , and methyl substrate to produce methane [42]. This suggested that the system of PV could cause enrichment of different types of methanogenic archaea.…”

Section: Archaeal Community Structurementioning

confidence: 99%

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Meng,

Li,

Han

et al. 2024

Waste Biomass Valor

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To determine optimized conditions for co-digestion for a mixture of four kinds of mixed vegetable crop residues consisting of cucumber, tomato, eggplant, and pepper mixed in equal parts on a mass basis, codigestion experiments were carried out with pig manure. The interaction effects of parameters such as manure-to-mixed vegetable residues ratios (M/S), initial pH, and organic load (OL) were investigated with respect to cumulative methane yield using response surface methodology (RSM). The highest cumulative methane yield was calculated to be 380.50 mL/g VS at an initial pH of 7.3, OL of 18.8 g VS/L, and M/S of 3.9:1. Comparison and veri cation experiments showed that under optimized conditions the co-digestion process showed increased the methane yield and had practical application value. The microbial analysis showed that the relative abundances of bacterial taxa, such as Clostridium_sensu_stricto_1, Fastidiosipila, and Terrisporobacter, were all highest in the co-digestion samples under optimized process conditions (PV). Different types of methanogenic archaea taxa in PV samples were richer than other samples, which showed higher relative abundances of Methanogenium, Methanobrevibacter, Methanoplanus, Methanospirillum, and Methanobrevibacter. Thus, the co-digestion system of a mixture of vegetable residues and pig manure can enrich different types of methanogenic archaea taxa, which leads to increased digestion performance, and may strengthen process stability. Importantly, pig manure, mixed vegetable residues can be included into anaerobic digestion applications through co-digestion, thus enabling valorization of these substantial residues and can be engineered for applications.

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Section: Archaeal Community Structurementioning

confidence: 99%

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Meng,

Li,

Han

et al. 2024

Waste Biomass Valor

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“…The addition of alkali can reduce the temperature of heat treatment and improve the treatment effect. The CH 4 yield was maintained at 0.55 m 3 /kg VS by low-temperature hot alkali (60 °C, pH=12.0) pretreatment [31]. Anaerobic codigestion of other organic solid wastes and excess sludge can also increase CH 4 yield.…”

Section: Energy Recyclingmentioning

confidence: 99%

Current Situation and Prospect in Urban Sewage Treatment Plants

Ding,

Li,

et al. 2024

E3S Web Conf.

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Sewage is the carrier of resources and energy, which contains great chemical energy and heat energy. The traditional sewage treatment process consumes energy, and the energy consumption is high. Under the background of carbon neutrality, China’s urban sewage treatment plants have achieved carbon neutrality operation in terms of energy self-sufficiency and reduction of greenhouse gas emissions. To explore the feasibility of carbon neutrality in sewage treatment plants, the cases of carbon neutrality in sewage treatment plants at domestic and abroad were analyzed. And the implementation approaches and main emission reduction processes to achieve carbon neutrality were summarized. The technical challenges and research directions of future sewage treatment plants in China from the perspective of carbon neutrality are proposed.

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“…The Methanobacterium reported for methane generation from H 2 /CO 2 in mesophilic conditions, and the optimum pH of Methanobacterium is over 6.5 [39,45]. Methanobrevibacter genera were also reported in several studies as hydrogenotrophic methanogens that convert biohydrogen to methane and cannot utilize acetic acid [38,46,47].…”

Section: Archaeal Community Compositionmentioning

confidence: 99%

Lipopeptide Biosurfactants Enhanced Biohydrogen Evolution from Lignocellulose Biomass and Shaped the Microbial Community and Diversity

Phulpoto,

Bobo,

Qazi

et al. 2024

International Journal of Energy Research

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Biohydrogen is a renewable and clean energy source that can be produced from cheap and abundantly available lignocellulose biomass. However, the complex structure of lignocellulose requires various physicochemical and biological pretreatments, as it exhibits significant resistance to microbial degradation. Biosurfactants can play a vital role in facilitating the microbial degradation of lignocellulose and inducing enzymatic hydrolysis. In addition, they can lower the surface tension to impede lignin-cellulase interactions and alter the lignin characteristics. Indeed, the application of lipopeptide biosurfactants to enhance hydrogen production from lignocellulose biomass is poorly studied. Thus, this study investigates the influence of lipopeptide biosurfactants on biohydrogen enhancement from lignocellulose biomass and their impact on short-chain fatty acid generation during anaerobic dark fermentation. Subsequently, Illumina HiSeq 2500 sequencing was employed to analyze the structure of microbial community and diversity significantly affected by the presence or absence of aided biosurfactants. Results revealed that the lipopeptide biosurfactant significantly improved the cumulative biogas and hydrogen production. The maximum cumulative hydrogen yield was achieved in lipopeptide-assisted bioreactors including BioR_3, BioR_2, and BioR_4 (i.e., 4.68, 4.56, and 4.50 mmol/2 g of substrate, respectively), showing an increase of 30.79% to 36.03% higher than BioR_1 (3.44 mmol). In addition, lipopeptide biosurfactants also impacted the short-chain fatty acid generation, where acetic acid, propionic acid, and isobutyric acid were found as major acids. On the other hand, various bacterial phyla, including Firmicutes, Proteobacteria, Actinobacteria, Chloroflexi, Planctomycetota, and Acidobacteriota, were detected in all bioreactors. Among the phyla, Firmicutes were predominated (54.74% to 86.38%) in lipopeptide-assisted bioreactors, indicating that biosurfactants substantially influenced the microbial community structure during hydrogen production. Besides, Ruminiclostridium and Bacillus were significantly promoted in lipopeptide-assisted bioreactors, representing efficient lignocellulose-degrading and hydrogen-producing genera. Conclusively, this study offers valuable insights into the underlying mechanism through which lipopeptide biosurfactants actively participate in biohydrogen production and illuminates the variations occurring within microbial communities.

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Comparison of two advanced anaerobic digestions of sewage sludge with high-temperature thermal pretreatment and low-temperature thermal-alkaline pretreatment

Cited by 49 publications

References 38 publications

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Current Situation and Prospect in Urban Sewage Treatment Plants

Lipopeptide Biosurfactants Enhanced Biohydrogen Evolution from Lignocellulose Biomass and Shaped the Microbial Community and Diversity

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