Biomethanation from enzymatically hydrolyzed brewer's spent grain: Impact of rapid increase in loadings

Haoyu Wang; Yu Tao; Margarida Temudo; Henk Bijl; Joris Kloek; Nanqi Ren; Jules B. van Lier; Merle de Kreuk

doi:10.1016/j.biortech.2015.04.073

Biomethanation from enzymatically hydrolyzed brewer's spent grain: Impact of rapid increase in loadings

Haoyu Wang
, Yu Tao
, Margarida Temudo
, Henk Bijl
, Joris Kloek
, Nanqi Ren^*
, Jules B. van Lier
, Merle de Kreuk

^*Corresponding author for this work

Harbin Institute of Technology
Delft University of Technology
Imperial College London
DSM Food Specialties

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Enzymatically hydrolyzed brewer's spent grain (BSG) was digested in two expanded granular sludge beds (EGSBs, named BSG1 and BSG2, respectively). Both reactors were operated with the same organic loading rate (OLR) from 1 to 10 kg CODm^-3d^-1 during the first 45days. Hereafter a rapid OLR increase was applied to BSG2 from 10 to 16 kg CODm^-3d^-1 within three weeks, while the OLR of BSG1 was increased by less than 2 kg CODm^-3d^-1 in the same period. Results showed that a 30% decrease in COD removal and 70% decrease in methane yield appeared in BSG2 after the rapid OLR increase, and volatile fatty acid (VFA) accumulated more than thirty times compared to BSG1. The biomass structure deteriorated and 15% of the biomass was lost from the BSG2 reactor. 454-PyroTag and qPCR analysis revealed a rapid growth of acidifiers (i.e., Bacteroides) and a unique microbial community in BSG2 following the rapid increase in OLR.

Original language	English
Pages (from-to)	167-174
Number of pages	8
Journal	Bioresource Technology
Volume	190
DOIs	https://doi.org/10.1016/j.biortech.2015.04.073
State	Published - 1 Aug 2015

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Biogas
Brewer's spent grain (BSG)
Expanded granular sludge bioreactors (EGSB)
Microbial community
Organic loading rate (OLR)

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10.1016/j.biortech.2015.04.073

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title = "Biomethanation from enzymatically hydrolyzed brewer's spent grain: Impact of rapid increase in loadings",

abstract = "Enzymatically hydrolyzed brewer's spent grain (BSG) was digested in two expanded granular sludge beds (EGSBs, named BSG1 and BSG2, respectively). Both reactors were operated with the same organic loading rate (OLR) from 1 to 10 kg CODm-3d-1 during the first 45days. Hereafter a rapid OLR increase was applied to BSG2 from 10 to 16 kg CODm-3d-1 within three weeks, while the OLR of BSG1 was increased by less than 2 kg CODm-3d-1 in the same period. Results showed that a 30\% decrease in COD removal and 70\% decrease in methane yield appeared in BSG2 after the rapid OLR increase, and volatile fatty acid (VFA) accumulated more than thirty times compared to BSG1. The biomass structure deteriorated and 15\% of the biomass was lost from the BSG2 reactor. 454-PyroTag and qPCR analysis revealed a rapid growth of acidifiers (i.e., Bacteroides) and a unique microbial community in BSG2 following the rapid increase in OLR.",

keywords = "Biogas, Brewer's spent grain (BSG), Expanded granular sludge bioreactors (EGSB), Microbial community, Organic loading rate (OLR)",

author = "Haoyu Wang and Yu Tao and Margarida Temudo and Henk Bijl and Joris Kloek and Nanqi Ren and \{van Lier\}, \{Jules B.\} and \{de Kreuk\}, Merle",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = aug,

day = "1",

doi = "10.1016/j.biortech.2015.04.073",

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T1 - Biomethanation from enzymatically hydrolyzed brewer's spent grain

T2 - Impact of rapid increase in loadings

AU - Wang, Haoyu

AU - Tao, Yu

AU - Temudo, Margarida

AU - Bijl, Henk

AU - Kloek, Joris

AU - Ren, Nanqi

AU - van Lier, Jules B.

AU - de Kreuk, Merle

PY - 2015/8/1

Y1 - 2015/8/1

N2 - Enzymatically hydrolyzed brewer's spent grain (BSG) was digested in two expanded granular sludge beds (EGSBs, named BSG1 and BSG2, respectively). Both reactors were operated with the same organic loading rate (OLR) from 1 to 10 kg CODm-3d-1 during the first 45days. Hereafter a rapid OLR increase was applied to BSG2 from 10 to 16 kg CODm-3d-1 within three weeks, while the OLR of BSG1 was increased by less than 2 kg CODm-3d-1 in the same period. Results showed that a 30% decrease in COD removal and 70% decrease in methane yield appeared in BSG2 after the rapid OLR increase, and volatile fatty acid (VFA) accumulated more than thirty times compared to BSG1. The biomass structure deteriorated and 15% of the biomass was lost from the BSG2 reactor. 454-PyroTag and qPCR analysis revealed a rapid growth of acidifiers (i.e., Bacteroides) and a unique microbial community in BSG2 following the rapid increase in OLR.

AB - Enzymatically hydrolyzed brewer's spent grain (BSG) was digested in two expanded granular sludge beds (EGSBs, named BSG1 and BSG2, respectively). Both reactors were operated with the same organic loading rate (OLR) from 1 to 10 kg CODm-3d-1 during the first 45days. Hereafter a rapid OLR increase was applied to BSG2 from 10 to 16 kg CODm-3d-1 within three weeks, while the OLR of BSG1 was increased by less than 2 kg CODm-3d-1 in the same period. Results showed that a 30% decrease in COD removal and 70% decrease in methane yield appeared in BSG2 after the rapid OLR increase, and volatile fatty acid (VFA) accumulated more than thirty times compared to BSG1. The biomass structure deteriorated and 15% of the biomass was lost from the BSG2 reactor. 454-PyroTag and qPCR analysis revealed a rapid growth of acidifiers (i.e., Bacteroides) and a unique microbial community in BSG2 following the rapid increase in OLR.

KW - Biogas

KW - Brewer's spent grain (BSG)

KW - Expanded granular sludge bioreactors (EGSB)

KW - Microbial community

KW - Organic loading rate (OLR)

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DO - 10.1016/j.biortech.2015.04.073

M3 - 文章

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AN - SCOPUS:84928819712

SN - 0960-8524

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JO - Bioresource Technology

JF - Bioresource Technology

ER -

Biomethanation from enzymatically hydrolyzed brewer's spent grain: Impact of rapid increase in loadings

Abstract

UN SDGs

Keywords

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