Continuous volatile fatty acid production from waste activated sludge hydrolyzed at pH 12

Xue Yang; Chunli Wan; Duu-Jong Lee; Maoan Du; Xiangliang Pan; Fang Wan

doi:10.1016/j.biortech.2014.02.066

Continuous volatile fatty acid production from waste activated sludge hydrolyzed at pH 12

Xue Yang
, Chunli Wan^*
, Duu-Jong Lee
, Maoan Du
, Xiangliang Pan
, Fang Wan

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

51 Citations (Scopus)

Abstract

This study adopted rapid alkaline treatment at pH 12 to hydrolyze 66% of total chemical oxygen demands. Then the hydrolyzed liquor was fermented in a continuous-flow stirred reactor to produce volatile fatty acids (VFAs) at 8-h hydraulic retention time and at 35°C. The maximum VFA productivity reached 365mg VFAsg^-1 volatile suspended solids in a 45-d operation, with most produced VFAs being acetate and propionate, principally produced by protein degradation. The Bacteroidia, ε-proteobacteria and the Clostridia were identified to be the classes correlating with the fermentation processes. The fermented liquor was applied to denitrifying phosphorus removal process as alternative carbon source after excess phosphorus and nitrogen being recycled via struvite precipitation. Fermented liquors from alkaline hydrolysis-acid fermentation on waste activated sludge are a potential renewable resource for applications that need organic carbons. © 2014 Elsevier Ltd.

Original language	English
Pages (from-to)	173-179
Journal	Bioresource Technology
Volume	168
DOIs	https://doi.org/10.1016/j.biortech.2014.02.066
Publication status	Published - Sept 2014
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation
SDG 14 Life Below Water

Research Keywords

Continuous
Denitrifying phosphorus removal
Fermentation
Volatile fatty acids
Waste activated sludge

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10.1016/j.biortech.2014.02.066

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title = "Continuous volatile fatty acid production from waste activated sludge hydrolyzed at pH 12",

abstract = "This study adopted rapid alkaline treatment at pH 12 to hydrolyze 66\% of total chemical oxygen demands. Then the hydrolyzed liquor was fermented in a continuous-flow stirred reactor to produce volatile fatty acids (VFAs) at 8-h hydraulic retention time and at 35°C. The maximum VFA productivity reached 365mg VFAsg-1 volatile suspended solids in a 45-d operation, with most produced VFAs being acetate and propionate, principally produced by protein degradation. The Bacteroidia, ε-proteobacteria and the Clostridia were identified to be the classes correlating with the fermentation processes. The fermented liquor was applied to denitrifying phosphorus removal process as alternative carbon source after excess phosphorus and nitrogen being recycled via struvite precipitation. Fermented liquors from alkaline hydrolysis-acid fermentation on waste activated sludge are a potential renewable resource for applications that need organic carbons. {\textcopyright} 2014 Elsevier Ltd.",

keywords = "Continuous, Denitrifying phosphorus removal, Fermentation, Volatile fatty acids, Waste activated sludge",

author = "Xue Yang and Chunli Wan and Duu-Jong Lee and Maoan Du and Xiangliang Pan and Fang Wan",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

year = "2014",

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doi = "10.1016/j.biortech.2014.02.066",

language = "English",

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TY - JOUR

T1 - Continuous volatile fatty acid production from waste activated sludge hydrolyzed at pH 12

AU - Yang, Xue

AU - Wan, Chunli

AU - Lee, Duu-Jong

AU - Du, Maoan

AU - Pan, Xiangliang

AU - Wan, Fang

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2014/9

Y1 - 2014/9

N2 - This study adopted rapid alkaline treatment at pH 12 to hydrolyze 66% of total chemical oxygen demands. Then the hydrolyzed liquor was fermented in a continuous-flow stirred reactor to produce volatile fatty acids (VFAs) at 8-h hydraulic retention time and at 35°C. The maximum VFA productivity reached 365mg VFAsg-1 volatile suspended solids in a 45-d operation, with most produced VFAs being acetate and propionate, principally produced by protein degradation. The Bacteroidia, ε-proteobacteria and the Clostridia were identified to be the classes correlating with the fermentation processes. The fermented liquor was applied to denitrifying phosphorus removal process as alternative carbon source after excess phosphorus and nitrogen being recycled via struvite precipitation. Fermented liquors from alkaline hydrolysis-acid fermentation on waste activated sludge are a potential renewable resource for applications that need organic carbons. © 2014 Elsevier Ltd.

AB - This study adopted rapid alkaline treatment at pH 12 to hydrolyze 66% of total chemical oxygen demands. Then the hydrolyzed liquor was fermented in a continuous-flow stirred reactor to produce volatile fatty acids (VFAs) at 8-h hydraulic retention time and at 35°C. The maximum VFA productivity reached 365mg VFAsg-1 volatile suspended solids in a 45-d operation, with most produced VFAs being acetate and propionate, principally produced by protein degradation. The Bacteroidia, ε-proteobacteria and the Clostridia were identified to be the classes correlating with the fermentation processes. The fermented liquor was applied to denitrifying phosphorus removal process as alternative carbon source after excess phosphorus and nitrogen being recycled via struvite precipitation. Fermented liquors from alkaline hydrolysis-acid fermentation on waste activated sludge are a potential renewable resource for applications that need organic carbons. © 2014 Elsevier Ltd.

KW - Continuous

KW - Denitrifying phosphorus removal

KW - Fermentation

KW - Volatile fatty acids

KW - Waste activated sludge

UR - https://www.scopus.com/pages/publications/84904985294

UR - https://www.scopus.com/pages/publications/84904985294#tab=impact

U2 - 10.1016/j.biortech.2014.02.066

DO - 10.1016/j.biortech.2014.02.066

M3 - RGC 21 - Publication in refereed journal

C2 - 24630368

SN - 0960-8524

VL - 168

SP - 173

EP - 179

JO - Bioresource Technology

JF - Bioresource Technology

ER -

Continuous volatile fatty acid production from waste activated sludge hydrolyzed at pH 12

Abstract

Bibliographical note

UN SDGs

Research Keywords

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