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You searched for: Journal name Environmental research Remove constraint Journal name: Environmental research Subject acidification Remove constraint Subject: acidification Subject activated sludge Remove constraint Subject: activated sludge
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1. Alkaline aided thermophiles pretreatment of waste activated sludge to increase short chain fatty acids production: Microbial community evolution by alkaline on hydrolysis and fermentation

Author:
Chun-Xue Yang; Shuai Zhao; Ze-Chong Guo; Wen-Zong Liu; Ling Wang; Shao-Peng Yu; Bao-Ling Liu; Xue Cong
Source:
Environmental research 2020 v.186 pp. 109503
ISSN:
0013-9351
Subject:
Acidobacteria; Caloramator; acidification; activated sludge; chemical oxygen demand; fermentation; heat tolerance; hydrolysis; microbial communities; proteins; proteolysis; short chain fatty acids; thermophilic bacteria
Abstract:
... Adding alkaline into an anaerobic waste activated sludge (WAS) fermentation with thermophilic bacteria pretreatment could efficiently improve short-chain fatty acids (SCFAs) accumulation to 3550 ± 120 mg COD/L. The acidification rate in combined test was 21.2%, while that was 15.6% and 10.7% in sole thermophilic bacteria pretreatment and control tests respectively. Four distinct groups of microbes ...
DOI:
10.1016/j.envres.2020.109503

2. Characteristics of bacterial populations in an industrial scale petrochemical wastewater treatment plant: Composition, function and their association with environmental factors

Author:
Qinghong Wang; Jiahao Liang; Simin Zhang; Brandon A. Yoza; Qing X. Li; Yali Zhan; Huangfan Ye; Peng Zhao; Chunmao Chen
Source:
Environmental research 2020 v.189 pp. 109939
ISSN:
0013-9351
Subject:
Acidobacteria; Bacteroidetes; Chloroflexi; Planctomycetes; Proteobacteria; acidification; activated sludge; bacterial communities; biochemical oxygen demand; biochemical pathways; biofilters; biological treatment; caprolactam; community structure; hydrolysis; naphthalene; petroleum; phylogeny; research; toluene; total nitrogen; variance; wastewater; wastewater treatment
Abstract:
... The efficiency of petrochemical wastewater biological treatment is dependent upon complex bacterial communities. A well understanding of the structure and function of bacterial community and their association with environmental variables is essential for the elucidation of contaminant removal mechanisms and optimization of wastewater treatment processes. In this study, the bacterial communities an ...
DOI:
10.1016/j.envres.2020.109939
CHORUS:
10.1016/j.envres.2020.109939

3. Effects of dissimilatory iron reduction on acetate production from the anaerobic fermentation of waste activated sludge under alkaline conditions

Author:
Zisheng Zhao; Yang Li; Zhiqiang Zhao; Qilin Yu; Yaobin Zhang
Source:
Environmental research 2020 v.182 pp. 109045
ISSN:
0013-9351
Subject:
acetates; acidification; activated sludge; anaerobic digesters; anaerobic digestion; butyrates; fermentation; hydrolysis; iron; iron oxides; methanogens; pH; short chain fatty acids
Abstract:
... Anaerobic digestion of waste activated sludge (WAS) to produce acetate has recently attracted growing interest, while the slow hydrolytic acidification of sludge and the consumption of acetate by methanogens both decrease the yield of acetate. In this study, Fe₃O₄ was added to a WAS anaerobic digester under alkaline conditions (pH = 10). The concentration of short-chain fatty acids (SCFA) during W ...
DOI:
10.1016/j.envres.2019.109045

4. Enhanced degradation of glucocorticoids, a potential COVID-19 remedy, by co-fermentation of waste activated sludge and animal manure: The role of manure type and degradation mechanism

Author:
Ai Zhang; Jinling He; Yuye Shen; Xianbao Xu; Yanan Liu; Yongmei Li; Shimin Wu; Gang Xue; Xiang Li; Jacek Makinia
Source:
Environmental research 2021 v.201 pp. 111488
ISSN:
0013-9351
Subject:
COVID-19 infection; acidification; activated sludge; anaerobes; anaerobic digestion; betamethasone; biomass; calcium; cortisol; dissolved organic carbon; fermentation; hydrogenation; hydrolysis; hydroxylation; lipophilicity; methylation; pH; pollutants; pollution; poultry manure; propionic acid; research; toxicity; value added; volatile fatty acids; waste reduction
Abstract:
... Waste activated sludge (WAS) and animal manure are two significant reservoirs of glucocorticoids (GCs) in the environment. However, GC degradation during anaerobic digestion (AD) of WAS or animal manure has rarely been investigated. In this study, co-fermentation of WAS and animal manure was conducted to investigate the performance of AD in controlling GC dissemination. Effects of manure type on G ...
DOI:
10.1016/j.envres.2021.111488

5. Simultaneous recovery of vivianite and produce short-chain fatty acids from waste activated sludge using potassium ferrate as pre-oxidation treatment

Author:
Qinxue Wen; Baozhen Liu; Zhiqiang Chen
Source:
Environmental research 2022 v.208 pp. 112661
ISSN:
0013-9351
Subject:
Geobacter; acidification; activated sludge; carbon; fermentation; neutralization; phosphates; potassium; research; wastewater treatment
Abstract:
... Recovery resources from waste active sludge (WAS) is an effective way to alleviate the predicament of WAS disposal, and it is also conducive to the carbon neutralization of wastewater treatment systems. This study discussed the strategy of WAS anaerobic fermentation after pre-oxidation with potassium ferrate (K₂FeO₄, PF), which can simultaneously recover vivianite and enhance SCFAs production. The ...
DOI:
10.1016/j.envres.2021.112661