Mitigation of NH3 and N2O emissions during food waste digestate composting at C/N ratio 15 using zeolite amendment

Dongyi Li; M. K. Manu; Sunita Varjani; Jonathan W.C. Wong

doi:10.1016/j.biortech.2022.127465

Mitigation of NH₃ and N₂O emissions during food waste digestate composting at C/N ratio 15 using zeolite amendment

Dongyi Li, M. K. Manu, Sunita Varjani, Jonathan W.C. Wong^*

^*Corresponding author for this work

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

44 Citations (Scopus)

Abstract

Composting of food waste digestate (FWD) is challenging as it requires more bulking agents, and the nitrogen loss is inevitable. To address these issues, FWD composting was conducted at a relatively lower C/N ratio of 15 with zeolite amendment in the dosage range of 5–15%. The impact of zeolite addition on nitrogen loss, NH₃ and N₂O emissions was assessed during FWD composting. The results showed that the addition of 10–15% zeolite could significantly reduce the phytotoxic nature of FWD and the compost maturity level could be reached in 10–21 days. Furthermore, ∼45% total nitrogen loss could be reduced by mitigating NH₃ and N₂O emissions upon 10 and 15% zeolite amendment. The outcome of the present study could be used as an effective strategy for composting FWD in any part of the world as the FWD characteristics are similar irrespective of the type of food waste. © 2022 Published by Elsevier Ltd.

Original language	English
Article number	127465
Journal	Bioresource Technology
Volume	359
Online published	11 Jun 2022
DOIs	https://doi.org/10.1016/j.biortech.2022.127465
Publication status	Published - Sept 2022
Externally published	Yes

Research Keywords

Compost maturity
Food waste digestate
N2O emission
NH3 emission
Nitrogen conservation
Zeolite

UN SDGs

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

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Cite this

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title = "Mitigation of NH3 and N2O emissions during food waste digestate composting at C/N ratio 15 using zeolite amendment",

abstract = "Composting of food waste digestate (FWD) is challenging as it requires more bulking agents, and the nitrogen loss is inevitable. To address these issues, FWD composting was conducted at a relatively lower C/N ratio of 15 with zeolite amendment in the dosage range of 5–15%. The impact of zeolite addition on nitrogen loss, NH3 and N2O emissions was assessed during FWD composting. The results showed that the addition of 10–15% zeolite could significantly reduce the phytotoxic nature of FWD and the compost maturity level could be reached in 10–21 days. Furthermore, ∼45% total nitrogen loss could be reduced by mitigating NH3 and N2O emissions upon 10 and 15% zeolite amendment. The outcome of the present study could be used as an effective strategy for composting FWD in any part of the world as the FWD characteristics are similar irrespective of the type of food waste. {\textcopyright} 2022 Published by Elsevier Ltd.",

keywords = "Compost maturity, Food waste digestate, N2O emission, NH3 emission, Nitrogen conservation, Zeolite",

author = "Dongyi Li and Manu, {M. K.} and Sunita Varjani and Wong, {Jonathan W.C.}",

year = "2022",

month = sep,

doi = "10.1016/j.biortech.2022.127465",

language = "English",

volume = "359",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Mitigation of NH3 and N2O emissions during food waste digestate composting at C/N ratio 15 using zeolite amendment

AU - Li, Dongyi

AU - Manu, M. K.

AU - Varjani, Sunita

AU - Wong, Jonathan W.C.

PY - 2022/9

Y1 - 2022/9

N2 - Composting of food waste digestate (FWD) is challenging as it requires more bulking agents, and the nitrogen loss is inevitable. To address these issues, FWD composting was conducted at a relatively lower C/N ratio of 15 with zeolite amendment in the dosage range of 5–15%. The impact of zeolite addition on nitrogen loss, NH3 and N2O emissions was assessed during FWD composting. The results showed that the addition of 10–15% zeolite could significantly reduce the phytotoxic nature of FWD and the compost maturity level could be reached in 10–21 days. Furthermore, ∼45% total nitrogen loss could be reduced by mitigating NH3 and N2O emissions upon 10 and 15% zeolite amendment. The outcome of the present study could be used as an effective strategy for composting FWD in any part of the world as the FWD characteristics are similar irrespective of the type of food waste. © 2022 Published by Elsevier Ltd.

AB - Composting of food waste digestate (FWD) is challenging as it requires more bulking agents, and the nitrogen loss is inevitable. To address these issues, FWD composting was conducted at a relatively lower C/N ratio of 15 with zeolite amendment in the dosage range of 5–15%. The impact of zeolite addition on nitrogen loss, NH3 and N2O emissions was assessed during FWD composting. The results showed that the addition of 10–15% zeolite could significantly reduce the phytotoxic nature of FWD and the compost maturity level could be reached in 10–21 days. Furthermore, ∼45% total nitrogen loss could be reduced by mitigating NH3 and N2O emissions upon 10 and 15% zeolite amendment. The outcome of the present study could be used as an effective strategy for composting FWD in any part of the world as the FWD characteristics are similar irrespective of the type of food waste. © 2022 Published by Elsevier Ltd.

KW - Compost maturity

KW - Food waste digestate

KW - N2O emission

KW - NH3 emission

KW - Nitrogen conservation

KW - Zeolite

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DO - 10.1016/j.biortech.2022.127465

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VL - 359

JO - Bioresource Technology

JF - Bioresource Technology

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