Short tests to couple N2O emission mitigation and nitrogen removal strategies for landfill leachate recirculation

Dong Wu; Chao Wang; Jan Dolfing; Bing Xie

doi:10.1016/j.scitotenv.2015.01.021

Short tests to couple N₂O emission mitigation and nitrogen removal strategies for landfill leachate recirculation

Dong Wu, Chao Wang, Jan Dolfing, Bing Xie^*

^*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

Landfills implemented with onsite leachate recirculation can efficiently remove pollutants, but currently they are reckoned as N₂O emission hot spots. In this project, we evaluated the relationship between N₂O emission and nitrogen (N) removal efficiency with different types of leachate recirculated. Nitrate supplemented leachate showed low N₂O emission rates with the highest N removal efficiency (~70%), which was equivalent to ~1% nitrogen emitted as N₂O. Although in nitrite containing leachates' N removal efficiencies also reached to ~60%, their emitted N₂O comprised ~40% of total removed nitrogen. Increasing nitrogen load promoted N₂O emission and N removal efficiency, except in ammonia type leachate. When the ratio of BOD to total nitrogen increased from 0.2 to 0.4, the N₂O emission flux from nitrate supplemented leachate decreased from ~25 to <0.5μgN/kg-soil·h. We argue prior to leachate in situ recirculation, sufficient pre-aeration is critical to mitigate N₂O surges and simultaneously enhance nitrogen removal efficiency.

Original language	English
Pages (from-to)	19-25
Number of pages	7
Journal	Science of the Total Environment
Volume	512-513
Early online date	19 Jan 2015
DOIs	https://doi.org/10.1016/j.scitotenv.2015.01.021
Publication status	Published - 5 Apr 2015
Externally published	Yes

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10.1016/j.scitotenv.2015.01.021

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title = "Short tests to couple N2O emission mitigation and nitrogen removal strategies for landfill leachate recirculation",

abstract = "Landfills implemented with onsite leachate recirculation can efficiently remove pollutants, but currently they are reckoned as N2O emission hot spots. In this project, we evaluated the relationship between N2O emission and nitrogen (N) removal efficiency with different types of leachate recirculated. Nitrate supplemented leachate showed low N2O emission rates with the highest N removal efficiency (~70%), which was equivalent to ~1% nitrogen emitted as N2O. Although in nitrite containing leachates' N removal efficiencies also reached to ~60%, their emitted N2O comprised ~40% of total removed nitrogen. Increasing nitrogen load promoted N2O emission and N removal efficiency, except in ammonia type leachate. When the ratio of BOD to total nitrogen increased from 0.2 to 0.4, the N2O emission flux from nitrate supplemented leachate decreased from ~25 to <0.5μgN/kg-soil·h. We argue prior to leachate in situ recirculation, sufficient pre-aeration is critical to mitigate N2O surges and simultaneously enhance nitrogen removal efficiency.",

keywords = "BOD/TN ratio, Leachate treatment, NO emission flux, Nitrogen form, Nitrogen load, Nitrogen removal",

author = "Dong Wu and Chao Wang and Jan Dolfing and Bing Xie",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China ( 31370510 , 31411130123 ) and the Shanghai project of international cooperation of science and technology ( 13520720600 ). Publisher Copyright: {\textcopyright} 2015 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2015",

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doi = "10.1016/j.scitotenv.2015.01.021",

language = "English",

volume = "512-513",

pages = "19--25",

journal = "Science of the Total Environment",

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T1 - Short tests to couple N2O emission mitigation and nitrogen removal strategies for landfill leachate recirculation

AU - Wu, Dong

AU - Wang, Chao

AU - Dolfing, Jan

AU - Xie, Bing

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China ( 31370510 , 31411130123 ) and the Shanghai project of international cooperation of science and technology ( 13520720600 ). Publisher Copyright: © 2015 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2015/4/5

Y1 - 2015/4/5

N2 - Landfills implemented with onsite leachate recirculation can efficiently remove pollutants, but currently they are reckoned as N2O emission hot spots. In this project, we evaluated the relationship between N2O emission and nitrogen (N) removal efficiency with different types of leachate recirculated. Nitrate supplemented leachate showed low N2O emission rates with the highest N removal efficiency (~70%), which was equivalent to ~1% nitrogen emitted as N2O. Although in nitrite containing leachates' N removal efficiencies also reached to ~60%, their emitted N2O comprised ~40% of total removed nitrogen. Increasing nitrogen load promoted N2O emission and N removal efficiency, except in ammonia type leachate. When the ratio of BOD to total nitrogen increased from 0.2 to 0.4, the N2O emission flux from nitrate supplemented leachate decreased from ~25 to <0.5μgN/kg-soil·h. We argue prior to leachate in situ recirculation, sufficient pre-aeration is critical to mitigate N2O surges and simultaneously enhance nitrogen removal efficiency.

AB - Landfills implemented with onsite leachate recirculation can efficiently remove pollutants, but currently they are reckoned as N2O emission hot spots. In this project, we evaluated the relationship between N2O emission and nitrogen (N) removal efficiency with different types of leachate recirculated. Nitrate supplemented leachate showed low N2O emission rates with the highest N removal efficiency (~70%), which was equivalent to ~1% nitrogen emitted as N2O. Although in nitrite containing leachates' N removal efficiencies also reached to ~60%, their emitted N2O comprised ~40% of total removed nitrogen. Increasing nitrogen load promoted N2O emission and N removal efficiency, except in ammonia type leachate. When the ratio of BOD to total nitrogen increased from 0.2 to 0.4, the N2O emission flux from nitrate supplemented leachate decreased from ~25 to <0.5μgN/kg-soil·h. We argue prior to leachate in situ recirculation, sufficient pre-aeration is critical to mitigate N2O surges and simultaneously enhance nitrogen removal efficiency.

KW - BOD/TN ratio

KW - Leachate treatment

KW - NO emission flux

KW - Nitrogen form

KW - Nitrogen load

KW - Nitrogen removal

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U2 - 10.1016/j.scitotenv.2015.01.021

DO - 10.1016/j.scitotenv.2015.01.021

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JO - Science of the Total Environment

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ER -

Short tests to couple N₂O emission mitigation and nitrogen removal strategies for landfill leachate recirculation

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