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Optimizing volatile fatty acid production in partial acidogenesis of swine wastewater SCIE SCOPUS

Title
Optimizing volatile fatty acid production in partial acidogenesis of swine wastewater
Authors
Yang, KOh, CHwang, S
Date Issued
2004-01
Publisher
I WA PUBLISHING
Abstract
This research has been conducted based on the fact that acetic and butyric acids are favorable substrates for methanogens, and that a low level of propionic acid production during acidogenesis minimizes the inhibition effect on methanogenic growth. Raw swine wastewater was pretreated with ammonia stripping to enhance acidogenesis. The ammonia nitrogen concentration of less than 1.2 g/L did not significantly affect the biochemical acidogenic potential of swine wastewater. For acidogenesis of swine wastewater, a set of experiments were carried out to produce short chain volatile fatty acids (VFA) in laboratory-scale continuously stirred tank reactors. The production of acetic, propionic, and butyric acids associated with simultaneous changes in hydraulic retention time (HRT) and temperature was investigated. Response surface methodology was successfully applied to approximate the responses of the VFA productions. The optimum physiological conditions where the maximum acetic and butyric acids production occurred were 2.4 days HRT at 34degreesC and 2.1 days HRT at 35degreesC, respectively. The propionic acid production linearly increased as both HRT and temperature increased.
Keywords
acidogenesis; ammonia inhibition; anaerobic digestion; response surface analysis; swine wastewater; ANAEROBIC-DIGESTION; CHEESE-WHEY; TEMPERATURE; AMMONIA; HRT
URI
https://oasis.postech.ac.kr/handle/2014.oak/24908
DOI
10.2166/wst.2004.0512
ISSN
0273-1223
Article Type
Article
Citation
WATER SCIENCE AND TECHNOLOGY, vol. 50, no. 8, page. 169 - 176, 2004-01
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황석환HWANG, SEOK HWAN
Div of Environmental Science & Enginrg
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