Biodegradation kinetics of ammonium enriched food waste digestate compost with biochar amendment

M. K. Manu; Chen Wang; Dongyi Li; Sunita Varjani; Yunjie Xu; Narsi Ladumor; Michael Lui; Jun Zhou; Jonathan W. C. Wong

doi:10.1016/j.biortech.2021.125871

Biodegradation kinetics of ammonium enriched food waste digestate compost with biochar amendment

M. K. Manu, Chen Wang, Dongyi Li, Sunita Varjani, Yunjie Xu, Narsi Ladumor, Michael Lui, Jun Zhou, Jonathan W. C. Wong^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

51 Citations (Scopus)

Abstract

High concentration of NH₄⁺-N in food waste digestate (FWD) produced from biological treatment of food waste is considered as a major threat on the composting process resulting in production of immature compost. Hence, a laboratory batch composting study was conducted to examine the feasibility of using biochar as a physical additive to ameliorate the inhibitory effect of NH₄⁺-N and to mitigate the nitrogen loss during FWD composting. FWD was co-composted with tobacco biochar at a dosage of 0%, 2.5%, 5% or 10% (dw) in bench-scale composters with a controlled aeration system. The addition of 10% biochar enhanced the degradation rate resulting in 44% higher carbon decomposition than the control. Besides, 10% biochar amendment reduced NH₃ and N loss by 58% and 5%, respectively and significantly reduced NH₄⁺-N content to HKORC limit of < 700 mg/kg dw within 5 days showing the beneficiary impact of biochar addition.

Original language	English
Article number	125871
Journal	Bioresource Technology
Volume	341
DOIs	https://doi.org/10.1016/j.biortech.2021.125871
Publication status	Published - Dec 2021

Scopus Subject Areas

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

User-Defined Keywords

Ammonia mitigation
Biochar
Compost quality
Degradation kinetics
Food waste digestate

UN SDGs

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

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10.1016/j.biortech.2021.125871

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title = "Biodegradation kinetics of ammonium enriched food waste digestate compost with biochar amendment",

abstract = "High concentration of NH4+-N in food waste digestate (FWD) produced from biological treatment of food waste is considered as a major threat on the composting process resulting in production of immature compost. Hence, a laboratory batch composting study was conducted to examine the feasibility of using biochar as a physical additive to ameliorate the inhibitory effect of NH4+-N and to mitigate the nitrogen loss during FWD composting. FWD was co-composted with tobacco biochar at a dosage of 0%, 2.5%, 5% or 10% (dw) in bench-scale composters with a controlled aeration system. The addition of 10% biochar enhanced the degradation rate resulting in 44% higher carbon decomposition than the control. Besides, 10% biochar amendment reduced NH3 and N loss by 58% and 5%, respectively and significantly reduced NH4+-N content to HKORC limit of < 700 mg/kg dw within 5 days showing the beneficiary impact of biochar addition.",

keywords = "Ammonia mitigation, Biochar, Compost quality, Degradation kinetics, Food waste digestate",

author = "Manu, {M. K.} and Chen Wang and Dongyi Li and Sunita Varjani and Yunjie Xu and Narsi Ladumor and Michael Lui and Jun Zhou and Wong, {Jonathan W. C.}",

note = "Funding Information: Financial support from the Oscar Bioenergy Limited, Hong Kong is greatly acknowledged. Department of Chemistry at HKBU is acknowledged for helping in EEM fluorescence spectroscopy analysis. Publisher Copyright: {\textcopyright} 2021 Published by Elsevier Ltd.",

year = "2021",

month = dec,

doi = "10.1016/j.biortech.2021.125871",

language = "English",

volume = "341",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Biodegradation kinetics of ammonium enriched food waste digestate compost with biochar amendment

AU - Manu, M. K.

AU - Wang, Chen

AU - Li, Dongyi

AU - Varjani, Sunita

AU - Xu, Yunjie

AU - Ladumor, Narsi

AU - Lui, Michael

AU - Zhou, Jun

AU - Wong, Jonathan W. C.

N1 - Funding Information: Financial support from the Oscar Bioenergy Limited, Hong Kong is greatly acknowledged. Department of Chemistry at HKBU is acknowledged for helping in EEM fluorescence spectroscopy analysis. Publisher Copyright: © 2021 Published by Elsevier Ltd.

PY - 2021/12

Y1 - 2021/12

N2 - High concentration of NH4+-N in food waste digestate (FWD) produced from biological treatment of food waste is considered as a major threat on the composting process resulting in production of immature compost. Hence, a laboratory batch composting study was conducted to examine the feasibility of using biochar as a physical additive to ameliorate the inhibitory effect of NH4+-N and to mitigate the nitrogen loss during FWD composting. FWD was co-composted with tobacco biochar at a dosage of 0%, 2.5%, 5% or 10% (dw) in bench-scale composters with a controlled aeration system. The addition of 10% biochar enhanced the degradation rate resulting in 44% higher carbon decomposition than the control. Besides, 10% biochar amendment reduced NH3 and N loss by 58% and 5%, respectively and significantly reduced NH4+-N content to HKORC limit of < 700 mg/kg dw within 5 days showing the beneficiary impact of biochar addition.

AB - High concentration of NH4+-N in food waste digestate (FWD) produced from biological treatment of food waste is considered as a major threat on the composting process resulting in production of immature compost. Hence, a laboratory batch composting study was conducted to examine the feasibility of using biochar as a physical additive to ameliorate the inhibitory effect of NH4+-N and to mitigate the nitrogen loss during FWD composting. FWD was co-composted with tobacco biochar at a dosage of 0%, 2.5%, 5% or 10% (dw) in bench-scale composters with a controlled aeration system. The addition of 10% biochar enhanced the degradation rate resulting in 44% higher carbon decomposition than the control. Besides, 10% biochar amendment reduced NH3 and N loss by 58% and 5%, respectively and significantly reduced NH4+-N content to HKORC limit of < 700 mg/kg dw within 5 days showing the beneficiary impact of biochar addition.

KW - Ammonia mitigation

KW - Biochar

KW - Compost quality

KW - Degradation kinetics

KW - Food waste digestate

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U2 - 10.1016/j.biortech.2021.125871

DO - 10.1016/j.biortech.2021.125871

M3 - Journal article

C2 - 34523563

AN - SCOPUS:85114768077

SN - 0960-8524

VL - 341

JO - Bioresource Technology

JF - Bioresource Technology

M1 - 125871

ER -

Biodegradation kinetics of ammonium enriched food waste digestate compost with biochar amendment

Abstract

Scopus Subject Areas

User-Defined Keywords

UN SDGs

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