Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process

A continuous-flow Anaerobic/Anoxic/Oxic (A2/O) system was operated at different organic concentrations to systematically investigate the effect on the nutrient removal, secretion characteristics of extracellular polymer, phosphorus forms transformation and changes in functional flora in this system....

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Autores principales:	Yajing Li, Yaping Wu, Shaopo Wang, Liyuan Jia
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	continuous-flow a2/o system eps microbial community structure organic loading phosphorus forms distribution Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/e1cb5166b43f42efb00487b0a862dcfe
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spelling	oai:doaj.org-article:e1cb5166b43f42efb00487b0a862dcfe2021-11-06T11:07:28ZEffect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process0273-12231996-973210.2166/wst.2021.158https://doaj.org/article/e1cb5166b43f42efb00487b0a862dcfe2021-06-01T00:00:00Zhttp://wst.iwaponline.com/content/83/11/2640https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732A continuous-flow Anaerobic/Anoxic/Oxic (A2/O) system was operated at different organic concentrations to systematically investigate the effect on the nutrient removal, secretion characteristics of extracellular polymer, phosphorus forms transformation and changes in functional flora in this system. The results showed that high organic loading was more conducive to promote the secretion of extracellular polymeric substance (EPS), the increase of polysaccharide content was more obvious compared with protein, the impact of organic loading on the components of loosely bound EPS (LB-EPS) was higher than that of tight-bound EPS (TB-EPS). Phosphorus in sludge floc mainly existed in the form of inorganic phosphorus (IP), and IP mainly existed in the form of apatite inorganic phosphorus (AP). High organic load showed higher phosphorus storage in EPS, and the phosphorus content in EPS was positively correlated with the content of EPS. Non-apatite phosphorus (NAIP) content played an important role in the extracellular dephosphorization. The abundance of Nitrosomonas and Nitrospira responsible for nitrification decreased with the increase in organic loading. The group of denitrifiers was large, and Azospira was the most abundant genus among them. Dechloromonas, Acinetobacter, Povalibacter, Chryseolinea and Pirellula were the functional genera closely associated with phosphorus removal. HIGHLIGHTS High organic loading promoted the secretion of EPS, the impact of organic loading on the components of LB-EPS was higher than that of TB-EPS.; NAIP played an important role in the extracellular phosphorus removal.; Influent organic loading shaped the bacterial community structure.; The core functional genera in N and P removal were identified by correlation analysis.;Yajing LiYaping WuShaopo WangLiyuan JiaIWA Publishingarticlecontinuous-flow a2/o systemepsmicrobial community structureorganic loadingphosphorus forms distributionEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 11, Pp 2640-2651 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	continuous-flow a2/o system eps microbial community structure organic loading phosphorus forms distribution Environmental technology. Sanitary engineering TD1-1066
spellingShingle	continuous-flow a2/o system eps microbial community structure organic loading phosphorus forms distribution Environmental technology. Sanitary engineering TD1-1066 Yajing Li Yaping Wu Shaopo Wang Liyuan Jia Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process
description	A continuous-flow Anaerobic/Anoxic/Oxic (A2/O) system was operated at different organic concentrations to systematically investigate the effect on the nutrient removal, secretion characteristics of extracellular polymer, phosphorus forms transformation and changes in functional flora in this system. The results showed that high organic loading was more conducive to promote the secretion of extracellular polymeric substance (EPS), the increase of polysaccharide content was more obvious compared with protein, the impact of organic loading on the components of loosely bound EPS (LB-EPS) was higher than that of tight-bound EPS (TB-EPS). Phosphorus in sludge floc mainly existed in the form of inorganic phosphorus (IP), and IP mainly existed in the form of apatite inorganic phosphorus (AP). High organic load showed higher phosphorus storage in EPS, and the phosphorus content in EPS was positively correlated with the content of EPS. Non-apatite phosphorus (NAIP) content played an important role in the extracellular dephosphorization. The abundance of Nitrosomonas and Nitrospira responsible for nitrification decreased with the increase in organic loading. The group of denitrifiers was large, and Azospira was the most abundant genus among them. Dechloromonas, Acinetobacter, Povalibacter, Chryseolinea and Pirellula were the functional genera closely associated with phosphorus removal. HIGHLIGHTS High organic loading promoted the secretion of EPS, the impact of organic loading on the components of LB-EPS was higher than that of TB-EPS.; NAIP played an important role in the extracellular phosphorus removal.; Influent organic loading shaped the bacterial community structure.; The core functional genera in N and P removal were identified by correlation analysis.;
format	article
author	Yajing Li Yaping Wu Shaopo Wang Liyuan Jia
author_facet	Yajing Li Yaping Wu Shaopo Wang Liyuan Jia
author_sort	Yajing Li
title	Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process
title_short	Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process
title_full	Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process
title_fullStr	Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process
title_full_unstemmed	Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process
title_sort	effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow a2/o process
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/e1cb5166b43f42efb00487b0a862dcfe
work_keys_str_mv	AT yajingli effectoforganicloadingonphosphorusformstransformationandmicrobialcommunityincontinuousflowa2oprocess AT yapingwu effectoforganicloadingonphosphorusformstransformationandmicrobialcommunityincontinuousflowa2oprocess AT shaopowang effectoforganicloadingonphosphorusformstransformationandmicrobialcommunityincontinuousflowa2oprocess AT liyuanjia effectoforganicloadingonphosphorusformstransformationandmicrobialcommunityincontinuousflowa2oprocess
_version_	1718443764613120000

Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A2/O process

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