Insight into effects of electro-dewatering pretreatment on nitrous oxide emission involved in related functional genes in sewage sludge composting

Ke Wang; Yiqi Wu; Zhe Wang; Wei Wang; Nanqi Ren

doi:10.1016/j.biortech.2018.05.089

Insight into effects of electro-dewatering pretreatment on nitrous oxide emission involved in related functional genes in sewage sludge composting

Ke Wang^*
, Yiqi Wu
, Zhe Wang
, Wei Wang
, Nanqi Ren

^*Corresponding author for this work

School of Environment, Harbin Institute of Technology

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

38 Scopus citations

Abstract

Electro-dewatering (ED) pretreatment could improve sludge dewatering performance and remove heavy metal, but the effect of ED pretreatment on nitrous oxide (N₂O) emission and related functional genes in sludge composting process is still unknown, which was firstly investigated in this study. The results revealed that ED pretreatment changed the physicochemical characteristics of sludge and impacted N₂O related functional genes, resulting in the reduction of cumulative N₂O emission by 77.04% during 60 days composting. The higher pH and NH₄⁺-N, but lower moisture, ORP and NO₂⁻-N emerged in the composting of ED sludge compared to mechanical dewatering (MD) sludge. Furthermore, ED pretreatment reduced amoA, hao, narG, nirK and nosZ in ED sludge on Day-10 and Day-60 of composting. It was found that nirK reduction was the major factor impacting N₂O generation in the initial composting of ED sludge, and the decline of amoA restricted N₂O production in the curing period.

Original language	English
Pages (from-to)	25-32
Number of pages	8
Journal	Bioresource Technology
Volume	265
DOIs	https://doi.org/10.1016/j.biortech.2018.05.089
State	Published - Oct 2018
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Composting
Electro-dewatering
Functional genes
NO
Sludge

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10.1016/j.biortech.2018.05.089

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@article{41e3cd916b224a4f9b934cf9ca32d39a,

title = "Insight into effects of electro-dewatering pretreatment on nitrous oxide emission involved in related functional genes in sewage sludge composting",

abstract = "Electro-dewatering (ED) pretreatment could improve sludge dewatering performance and remove heavy metal, but the effect of ED pretreatment on nitrous oxide (N2O) emission and related functional genes in sludge composting process is still unknown, which was firstly investigated in this study. The results revealed that ED pretreatment changed the physicochemical characteristics of sludge and impacted N2O related functional genes, resulting in the reduction of cumulative N2O emission by 77.04\% during 60 days composting. The higher pH and NH4+-N, but lower moisture, ORP and NO2−-N emerged in the composting of ED sludge compared to mechanical dewatering (MD) sludge. Furthermore, ED pretreatment reduced amoA, hao, narG, nirK and nosZ in ED sludge on Day-10 and Day-60 of composting. It was found that nirK reduction was the major factor impacting N2O generation in the initial composting of ED sludge, and the decline of amoA restricted N2O production in the curing period.",

keywords = "Composting, Electro-dewatering, Functional genes, NO, Sludge",

author = "Ke Wang and Yiqi Wu and Zhe Wang and Wei Wang and Nanqi Ren",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = oct,

doi = "10.1016/j.biortech.2018.05.089",

language = "英语",

volume = "265",

pages = "25--32",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Insight into effects of electro-dewatering pretreatment on nitrous oxide emission involved in related functional genes in sewage sludge composting

AU - Wang, Ke

AU - Wu, Yiqi

AU - Wang, Zhe

AU - Wang, Wei

AU - Ren, Nanqi

PY - 2018/10

Y1 - 2018/10

N2 - Electro-dewatering (ED) pretreatment could improve sludge dewatering performance and remove heavy metal, but the effect of ED pretreatment on nitrous oxide (N2O) emission and related functional genes in sludge composting process is still unknown, which was firstly investigated in this study. The results revealed that ED pretreatment changed the physicochemical characteristics of sludge and impacted N2O related functional genes, resulting in the reduction of cumulative N2O emission by 77.04% during 60 days composting. The higher pH and NH4+-N, but lower moisture, ORP and NO2−-N emerged in the composting of ED sludge compared to mechanical dewatering (MD) sludge. Furthermore, ED pretreatment reduced amoA, hao, narG, nirK and nosZ in ED sludge on Day-10 and Day-60 of composting. It was found that nirK reduction was the major factor impacting N2O generation in the initial composting of ED sludge, and the decline of amoA restricted N2O production in the curing period.

AB - Electro-dewatering (ED) pretreatment could improve sludge dewatering performance and remove heavy metal, but the effect of ED pretreatment on nitrous oxide (N2O) emission and related functional genes in sludge composting process is still unknown, which was firstly investigated in this study. The results revealed that ED pretreatment changed the physicochemical characteristics of sludge and impacted N2O related functional genes, resulting in the reduction of cumulative N2O emission by 77.04% during 60 days composting. The higher pH and NH4+-N, but lower moisture, ORP and NO2−-N emerged in the composting of ED sludge compared to mechanical dewatering (MD) sludge. Furthermore, ED pretreatment reduced amoA, hao, narG, nirK and nosZ in ED sludge on Day-10 and Day-60 of composting. It was found that nirK reduction was the major factor impacting N2O generation in the initial composting of ED sludge, and the decline of amoA restricted N2O production in the curing period.

KW - Composting

KW - Electro-dewatering

KW - Functional genes

KW - NO

KW - Sludge

UR - https://www.scopus.com/pages/publications/85047837157

U2 - 10.1016/j.biortech.2018.05.089

DO - 10.1016/j.biortech.2018.05.089

M3 - 文章

C2 - 29864734

AN - SCOPUS:85047837157

SN - 0960-8524

VL - 265

SP - 25

EP - 32

JO - Bioresource Technology

JF - Bioresource Technology

ER -

Insight into effects of electro-dewatering pretreatment on nitrous oxide emission involved in related functional genes in sewage sludge composting

Abstract

UN SDGs

Keywords

Access to Document

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