Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode

The influences of influent surface organic loading rate (SOLR) and aeration mode on matrix oxygen, organic matter, nitrogen, phosphorus removal, greenhouse gases emission and functional gene abundances in lab-scale wastewater ecological soil infiltration systems (WESISs) were investigated. In WESISs...

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Autores principales:	Jingna Chen, Zefang Jiang, Yue Chen, Yu Qiu, Tingting Tao, Xiaoli Du, Jing Pan
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	aeration mode greenhouse gas surface organic loading rate wastewater ecological soil infiltration system Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/a80c0abda1a145d79516c535b6985d30
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spelling	oai:doaj.org-article:a80c0abda1a145d79516c535b6985d302021-11-06T10:54:14ZPollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode0273-12231996-973210.2166/wst.2021.087https://doaj.org/article/a80c0abda1a145d79516c535b6985d302021-04-01T00:00:00Zhttp://wst.iwaponline.com/content/83/7/1619https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732The influences of influent surface organic loading rate (SOLR) and aeration mode on matrix oxygen, organic matter, nitrogen, phosphorus removal, greenhouse gases emission and functional gene abundances in lab-scale wastewater ecological soil infiltration systems (WESISs) were investigated. In WESISs, intermittent or continuous aeration improved oxygen supply at 50 cm depth and hardly changed anaerobic condition below 80 cm depth, which enhanced chemical oxygen demand (COD), NH4+-N, total nitrogen (TN) removal, the abundances of bacterial 16S rRNA, amoA, nxrA, narG, napA, nirK, nirS, qnorB, nosZ genes and reduced CH4, N2O conversion efficiencies with SOLR of 16.9 and 27.6 g BOD/(m2 d) compared with non-aeration. Increased SOLR resulted in high TN removal, low N2O emission in aeration WESIS, which was different from non-aeration WESIS. High average COD removal efficiency of 90.7%, NH4+-N removal efficiency of 87.0%, TN removal efficiency of 84.6%, total phosphorus (TP) removal efficiency of 93.1% and low average N2O emission rate of 12.8 mg/(m2 d) were achieved with SOLR of 16.9 g BOD/(m2 d) in intermittent aeration WESIS. However, continuous aeration WESIS obtained high average removal efficiencies of 90.1% for COD, 87.5% for NH4+-N, 84.1% for TN, 92.9% for TP and low average emission rate of 13.1 mg/(m2 d) for N2O with SOLR of 27.6 g BOD/(m2 d). Aeration could be an optional strategy for WESISs to achieve high pollutants removal and low CH4, N2O emission when treating wastewater with high SOLR. HIGHLIGHTS SOLR and aeration mode significantly affected pollutants removal and GHGs emission.; Aeration obtained high pollutants removal and low CH4, N2O conversion efficiencies.; Aeration enhanced the abundances of bacterial 16S rRNA and nitrogen removal genes.; SOLR of 16.9–27.6 g BOD/(m2 d) was suggested for aeration WESISs.;Jingna ChenZefang JiangYue ChenYu QiuTingting TaoXiaoli DuJing PanIWA Publishingarticleaeration modegreenhouse gassurface organic loading ratewastewater ecological soil infiltration systemEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 7, Pp 1619-1632 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aeration mode greenhouse gas surface organic loading rate wastewater ecological soil infiltration system Environmental technology. Sanitary engineering TD1-1066
spellingShingle	aeration mode greenhouse gas surface organic loading rate wastewater ecological soil infiltration system Environmental technology. Sanitary engineering TD1-1066 Jingna Chen Zefang Jiang Yue Chen Yu Qiu Tingting Tao Xiaoli Du Jing Pan Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode
description	The influences of influent surface organic loading rate (SOLR) and aeration mode on matrix oxygen, organic matter, nitrogen, phosphorus removal, greenhouse gases emission and functional gene abundances in lab-scale wastewater ecological soil infiltration systems (WESISs) were investigated. In WESISs, intermittent or continuous aeration improved oxygen supply at 50 cm depth and hardly changed anaerobic condition below 80 cm depth, which enhanced chemical oxygen demand (COD), NH4+-N, total nitrogen (TN) removal, the abundances of bacterial 16S rRNA, amoA, nxrA, narG, napA, nirK, nirS, qnorB, nosZ genes and reduced CH4, N2O conversion efficiencies with SOLR of 16.9 and 27.6 g BOD/(m2 d) compared with non-aeration. Increased SOLR resulted in high TN removal, low N2O emission in aeration WESIS, which was different from non-aeration WESIS. High average COD removal efficiency of 90.7%, NH4+-N removal efficiency of 87.0%, TN removal efficiency of 84.6%, total phosphorus (TP) removal efficiency of 93.1% and low average N2O emission rate of 12.8 mg/(m2 d) were achieved with SOLR of 16.9 g BOD/(m2 d) in intermittent aeration WESIS. However, continuous aeration WESIS obtained high average removal efficiencies of 90.1% for COD, 87.5% for NH4+-N, 84.1% for TN, 92.9% for TP and low average emission rate of 13.1 mg/(m2 d) for N2O with SOLR of 27.6 g BOD/(m2 d). Aeration could be an optional strategy for WESISs to achieve high pollutants removal and low CH4, N2O emission when treating wastewater with high SOLR. HIGHLIGHTS SOLR and aeration mode significantly affected pollutants removal and GHGs emission.; Aeration obtained high pollutants removal and low CH4, N2O conversion efficiencies.; Aeration enhanced the abundances of bacterial 16S rRNA and nitrogen removal genes.; SOLR of 16.9–27.6 g BOD/(m2 d) was suggested for aeration WESISs.;
format	article
author	Jingna Chen Zefang Jiang Yue Chen Yu Qiu Tingting Tao Xiaoli Du Jing Pan
author_facet	Jingna Chen Zefang Jiang Yue Chen Yu Qiu Tingting Tao Xiaoli Du Jing Pan
author_sort	Jingna Chen
title	Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode
title_short	Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode
title_full	Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode
title_fullStr	Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode
title_full_unstemmed	Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode
title_sort	pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/a80c0abda1a145d79516c535b6985d30
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Pollutants removal, greenhouse gases emission and functional genes in wastewater ecological soil infiltration systems: influences of influent surface organic loading and aeration mode

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