Energy recovery potential of thermophilic high-solids co-digestion of coffee processing wastewater and waste activated sludge by anaerobic membrane bioreactor

Rong Chen; Wen Wen; Hongyu Jiang; Zhen Lei; Mingzhe Li; Yu You Li

doi:10.1016/j.biortech.2018.11.080

Energy recovery potential of thermophilic high-solids co-digestion of coffee processing wastewater and waste activated sludge by anaerobic membrane bioreactor

Rong Chen, Wen Wen, Hongyu Jiang, Zhen Lei, Mingzhe Li, Yu You Li

ENG - Civil and Environmental Engineering

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

46 Citations (Scopus)

Abstract

A large amount of wastewater is generated in the processing of coffee from fruit to cup. Thermophilic high-solids co-digestion of coffee processing wastewater (CPW) and waste activated sludge (WAS) has been succeeded by anaerobic membrane bioreactor (AnMBR). Chemical oxygen demand (COD) removal efficiencies of 92 ± 3% with an average methane yield of 0.28 LCH₄/gCOD_removed were achieved at a high solids content of 50 g/L in the AnMBR. The optimal digestion performance of 82.4% removal COD conversion to CH₄ was achieved at hydraulic retention time (HRT) 10 d. Energy balance analysis revealed AnMBR has succeeded in energy positive at all the HRTs. The net energy potential (NEP) was determined to average 2.12–2.82 kJ/gCOD, amongst which the maximum NEP was achieved at HRT 15 d. These results indicated the high-solids co-digestion by AnMBR is a promising approach to maximize the bioenergy conversion from the co-substrate of CPW and WAS.

Original language	English
Pages (from-to)	127-133
Number of pages	7
Journal	Bioresource Technology
Volume	274
DOIs	https://doi.org/10.1016/j.biortech.2018.11.080
Publication status	Published - 2019 Feb

Keywords

Anaerobic membrane bioreactor
Bioenergy recovery
Co-substrate fermentation
Coffee processing wastewater
Waste activated sludge

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

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

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10.1016/j.biortech.2018.11.080

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title = "Energy recovery potential of thermophilic high-solids co-digestion of coffee processing wastewater and waste activated sludge by anaerobic membrane bioreactor",

abstract = "A large amount of wastewater is generated in the processing of coffee from fruit to cup. Thermophilic high-solids co-digestion of coffee processing wastewater (CPW) and waste activated sludge (WAS) has been succeeded by anaerobic membrane bioreactor (AnMBR). Chemical oxygen demand (COD) removal efficiencies of 92 ± 3% with an average methane yield of 0.28 LCH4/gCODremoved were achieved at a high solids content of 50 g/L in the AnMBR. The optimal digestion performance of 82.4% removal COD conversion to CH4 was achieved at hydraulic retention time (HRT) 10 d. Energy balance analysis revealed AnMBR has succeeded in energy positive at all the HRTs. The net energy potential (NEP) was determined to average 2.12–2.82 kJ/gCOD, amongst which the maximum NEP was achieved at HRT 15 d. These results indicated the high-solids co-digestion by AnMBR is a promising approach to maximize the bioenergy conversion from the co-substrate of CPW and WAS.",

keywords = "Anaerobic membrane bioreactor, Bioenergy recovery, Co-substrate fermentation, Coffee processing wastewater, Waste activated sludge",

author = "Rong Chen and Wen Wen and Hongyu Jiang and Zhen Lei and Mingzhe Li and Li, {Yu You}",

note = "Funding Information: This work was supported by the Shaanxi Provincial Key Program for Science and Technology Development (No. 2018KWZ-06 ) and the Shaanxi Program for Overseas Returnees (No. 2018012 ). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

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doi = "10.1016/j.biortech.2018.11.080",

language = "English",

volume = "274",

pages = "127--133",

journal = "Agricultural Wastes",

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TY - JOUR

T1 - Energy recovery potential of thermophilic high-solids co-digestion of coffee processing wastewater and waste activated sludge by anaerobic membrane bioreactor

AU - Chen, Rong

AU - Wen, Wen

AU - Jiang, Hongyu

AU - Lei, Zhen

AU - Li, Mingzhe

AU - Li, Yu You

N1 - Funding Information: This work was supported by the Shaanxi Provincial Key Program for Science and Technology Development (No. 2018KWZ-06 ) and the Shaanxi Program for Overseas Returnees (No. 2018012 ). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2019/2

Y1 - 2019/2

N2 - A large amount of wastewater is generated in the processing of coffee from fruit to cup. Thermophilic high-solids co-digestion of coffee processing wastewater (CPW) and waste activated sludge (WAS) has been succeeded by anaerobic membrane bioreactor (AnMBR). Chemical oxygen demand (COD) removal efficiencies of 92 ± 3% with an average methane yield of 0.28 LCH4/gCODremoved were achieved at a high solids content of 50 g/L in the AnMBR. The optimal digestion performance of 82.4% removal COD conversion to CH4 was achieved at hydraulic retention time (HRT) 10 d. Energy balance analysis revealed AnMBR has succeeded in energy positive at all the HRTs. The net energy potential (NEP) was determined to average 2.12–2.82 kJ/gCOD, amongst which the maximum NEP was achieved at HRT 15 d. These results indicated the high-solids co-digestion by AnMBR is a promising approach to maximize the bioenergy conversion from the co-substrate of CPW and WAS.

AB - A large amount of wastewater is generated in the processing of coffee from fruit to cup. Thermophilic high-solids co-digestion of coffee processing wastewater (CPW) and waste activated sludge (WAS) has been succeeded by anaerobic membrane bioreactor (AnMBR). Chemical oxygen demand (COD) removal efficiencies of 92 ± 3% with an average methane yield of 0.28 LCH4/gCODremoved were achieved at a high solids content of 50 g/L in the AnMBR. The optimal digestion performance of 82.4% removal COD conversion to CH4 was achieved at hydraulic retention time (HRT) 10 d. Energy balance analysis revealed AnMBR has succeeded in energy positive at all the HRTs. The net energy potential (NEP) was determined to average 2.12–2.82 kJ/gCOD, amongst which the maximum NEP was achieved at HRT 15 d. These results indicated the high-solids co-digestion by AnMBR is a promising approach to maximize the bioenergy conversion from the co-substrate of CPW and WAS.

KW - Anaerobic membrane bioreactor

KW - Bioenergy recovery

KW - Co-substrate fermentation

KW - Coffee processing wastewater

KW - Waste activated sludge

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JO - Agricultural Wastes

JF - Agricultural Wastes

ER -

Energy recovery potential of thermophilic high-solids co-digestion of coffee processing wastewater and waste activated sludge by anaerobic membrane bioreactor

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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