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 degrad...

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Main Authors: Maspolim, Yogananda, Ng, Wun Jern, Xiao, Keke, Zhou, Yan, Guo, Chenghong
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2016
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Online Access:https://hdl.handle.net/10356/82359
http://hdl.handle.net/10220/39975
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-823592020-03-07T11:43:40Z Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system Maspolim, Yogananda Ng, Wun Jern Xiao, Keke Zhou, Yan Guo, Chenghong School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Waste treatment Undissociated volatile fatty acids Acidogenesis Anaerobic process Substrate inhibition 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 (unVFAs) 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 unVFAs concentrations, with 59%, 37% and 60% reduction in production rates at 2190 mg chemical oxygen demand (COD)/L undissociated acetic acid (unHAc), 2130 mg COD/L undissociated propionic acid (unHPr) and 2280 mg COD/L undissociated n-butyric acid (unHBu), respectively. The profile of VFAs produced further indicated that while an unVFA can primarily affect its own formation, there were also unVFAs that affected the formation of other VFAs. NRF (Natl Research Foundation, S’pore) 2016-02-15T07:27:32Z 2019-12-06T14:54:04Z 2016-02-15T07:27:32Z 2019-12-06T14:54:04Z 2015 Journal Article Xiao, K., Zhou, Y., Guo, C., Maspolim, Y., & Ng, W. J. (2015). Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system. Journal of Environmental Sciences, 42, 196-201. 1001-0742 https://hdl.handle.net/10356/82359 http://hdl.handle.net/10220/39975 10.1016/j.jes.2015.06.015 en Journal of Environmental Sciences © 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. 6 p.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Waste treatment
Undissociated volatile fatty acids
Acidogenesis
Anaerobic process
Substrate inhibition
spellingShingle Waste treatment
Undissociated volatile fatty acids
Acidogenesis
Anaerobic process
Substrate inhibition
Maspolim, Yogananda
Ng, Wun Jern
Xiao, Keke
Zhou, Yan
Guo, Chenghong
Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system
description 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 (unVFAs) 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 unVFAs concentrations, with 59%, 37% and 60% reduction in production rates at 2190 mg chemical oxygen demand (COD)/L undissociated acetic acid (unHAc), 2130 mg COD/L undissociated propionic acid (unHPr) and 2280 mg COD/L undissociated n-butyric acid (unHBu), respectively. The profile of VFAs produced further indicated that while an unVFA can primarily affect its own formation, there were also unVFAs that affected the formation of other VFAs.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Maspolim, Yogananda
Ng, Wun Jern
Xiao, Keke
Zhou, Yan
Guo, Chenghong
format Article
author Maspolim, Yogananda
Ng, Wun Jern
Xiao, Keke
Zhou, Yan
Guo, Chenghong
author_sort Maspolim, Yogananda
title Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system
title_short Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system
title_full Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system
title_fullStr Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system
title_full_unstemmed Impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system
title_sort impact of undissociated volatile fatty acids on acidogenesis in a two-phase anaerobic system
publishDate 2016
url https://hdl.handle.net/10356/82359
http://hdl.handle.net/10220/39975
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