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You searched for: Subject chemical oxygen demand Remove constraint Subject: chemical oxygen demand Subject term Caloramator Remove constraint Subject term: Caloramator Subject term activated sludge Remove constraint Subject term: activated sludge Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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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. Freezing/thawing pretreatment coupled with biological process of thermophilic Geobacillus sp. G1: Acceleration on waste activated sludge hydrolysis and acidification

Author:
Chunxue Yang; Wenzong Liu; Zhangwei He; Sangeetha Thangavel; Ling Wang; Aijuan Zhou; Aijie Wang
Source:
Bioresource technology 2015 v.175 pp. 509-516
ISSN:
0960-8524
Subject:
Caloramator; Clostridium; Geobacillus; acidification; activated sludge; bacteria; chemical oxygen demand; fluorescence; fluorescence emission spectroscopy; freezing; hydrolysis; sequence analysis; short chain fatty acids; synergism; thawing
Abstract:
... A novel pretreatment method combining freezing/thawing with Geobacillus sp. G1 was employed to pretreat waste activated sludge (WAS) for enhancing the WAS hydrolysis and subsequent short-chain fatty acids (SCFAs) production. Results showed that freezing/thawing combined with Geobacillus sp. G1 pretreatment achieved the maximal concentrations of soluble protein from 40±6mg COD/L (non-pretreated) to ...
DOI:
10.1016/j.biortech.2014.10.154