Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system

This study investigated the degradation and production of volatile fatty acids（VFAs）in the acidogenic phase reactor of a two-phase anaerobic system.20 mmol/L bromoethanesulfonic acid（BESA）was used to inhibit acidogenic methanogens（which were present in the acidogenic phase reactor）from degrading VFA...

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Bibliographic Details
Published inJournal of environmental sciences (China) Vol. 42; no. 4; pp. 196 - 201
Main Authors Xiao, Keke, Zhou, Yan, Guo, Chenghong, Maspolim, Yogananda, Ng, Wun Jern
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.04.2016
Subjects
acetic acid
Acidogenesis
Anaerobic process
Anaerobiosis
Biodegradation, Environmental
Bioreactors
chemical oxygen demand
COD
Fatty Acids, Volatile
glucose
methanogens
propionic acid
Substrate inhibition
Undissociated volatile fatty acids
volatile fatty acids
Waste treatment
两相厌氧系统
产甲烷菌
产酸相反应器
化学需氧量
挥发性脂肪酸
糖降解
解离
Substrate inhibition
Anaerobic process
Undissociated volatile fatty acids
Acidogenesis
Waste treatment
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Summary:This study investigated the degradation and production of volatile fatty acids（VFAs）in the acidogenic phase reactor of a two-phase anaerobic system.20 mmol/L bromoethanesulfonic acid（BESA）was used to inhibit acidogenic methanogens（which were present in the acidogenic phase reactor）from degrading VFAs.The impact of undissociated volatile fatty acids（un VFAs）on＂net＂VFAs production in the acidogenic phase reactor was then evaluated,with the exclusion of concurrent VFAs degradation.＂Net＂VFAs production from glucose degradation was partially inhibited at high un VFAs concentrations,with 59%,37% and 60% reduction in production rates at 2190 mg chemical oxygen demand（COD）/L undissociated acetic acid（un HAc）,2130 mg COD/L undissociated propionic acid（un HPr）and 2280 mg COD/L undissociated n-butyric acid（un HBu）,respectively.The profile of VFAs produced further indicated that while an un VFA can primarily affect its own formation,there were also un VFAs that affected the formation of other VFAs.
Bibliography:Anaerobic process Waste treatment Substrate inhibition Undissociated volatile fatty acids Acidogenesis
This study investigated the degradation and production of volatile fatty acids（VFAs）in the acidogenic phase reactor of a two-phase anaerobic system.20 mmol/L bromoethanesulfonic acid（BESA）was used to inhibit acidogenic methanogens（which were present in the acidogenic phase reactor）from degrading VFAs.The impact of undissociated volatile fatty acids（un VFAs）on＂net＂VFAs production in the acidogenic phase reactor was then evaluated,with the exclusion of concurrent VFAs degradation.＂Net＂VFAs production from glucose degradation was partially inhibited at high un VFAs concentrations,with 59%,37% and 60% reduction in production rates at 2190 mg chemical oxygen demand（COD）/L undissociated acetic acid（un HAc）,2130 mg COD/L undissociated propionic acid（un HPr）and 2280 mg COD/L undissociated n-butyric acid（un HBu）,respectively.The profile of VFAs produced further indicated that while an un VFA can primarily affect its own formation,there were also un VFAs that affected the formation of other VFAs.
11-2629/X
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1001-0742
1878-7320
DOI:10.1016/j.jes.2015.06.015