Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode

The effects of pure oxygen aeration on compositional characteristics of soluble microbial products (SMP) and extracellular polymeric substances (EPS) of the activated sludge acclimated in a sequential batch reactor (SBR) were explored in batch mode. The structure of the extracellular products would...

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Autores principales:	Jia-Ying He, Hong-Ling Zhang, Hong Wang, Ya-Qi Hu, Yong Zhang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	activated sludge aeration rate extracellular polymeric substances pure oxygen aeration soluble microbial products Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/3d94395cb04640abb3ea99aaf9de2eeb
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spelling	oai:doaj.org-article:3d94395cb04640abb3ea99aaf9de2eeb2021-11-06T10:56:16ZCharacteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode0273-12231996-973210.2166/wst.2021.099https://doaj.org/article/3d94395cb04640abb3ea99aaf9de2eeb2021-04-01T00:00:00Zhttp://wst.iwaponline.com/content/83/8/1946https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732The effects of pure oxygen aeration on compositional characteristics of soluble microbial products (SMP) and extracellular polymeric substances (EPS) of the activated sludge acclimated in a sequential batch reactor (SBR) were explored in batch mode. The structure of the extracellular products would change with different aeration methods or aeration rates. The proportion of SMP of most oxygen aerated sludge was less than 10%, while that in air aerated sludge was as high as 30–40%. The proportion of TB-EPS decreased from 56.95% to 30.63%, and the proportion of LB-EPS increased obviously with the increase of oxygen aeration rate. The contents of the protein (PN) and the polysaccharide (PS) of extracellular products with oxygen aeration were significantly different, and the PN was much higher than PS (p < 0.05). The zeta potential of each component in activated sludge was negative, gradually decreasing with the progress of biological treatment. The fluorescence peaks in SMP, LB-EPS and TB-EPS with pure oxygen aeration were attributed to tryptophan PN-like and humic acid-like fractions. The results showed that the proportion of the components in the extracellular products could be regulated by adjusting the aeration rate and aeration mode, so as to optimize the treatment process of activated sludge. HIGHLIGHTS SMP with pure oxygen aerated effluent was lower than that of air aeration.; The proportion of TB-EPS was higher under low aeration rate with pure oxygen aeration.; PN was much higher than PS with pure oxygen aeration.; Zeta potential was related to both the total amount of extracellular products and the PN content.;Jia-Ying HeHong-Ling ZhangHong WangYa-Qi HuYong ZhangIWA Publishingarticleactivated sludgeaeration rateextracellular polymeric substancespure oxygen aerationsoluble microbial productsEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 8, Pp 1946-1957 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	activated sludge aeration rate extracellular polymeric substances pure oxygen aeration soluble microbial products Environmental technology. Sanitary engineering TD1-1066
spellingShingle	activated sludge aeration rate extracellular polymeric substances pure oxygen aeration soluble microbial products Environmental technology. Sanitary engineering TD1-1066 Jia-Ying He Hong-Ling Zhang Hong Wang Ya-Qi Hu Yong Zhang Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode
description	The effects of pure oxygen aeration on compositional characteristics of soluble microbial products (SMP) and extracellular polymeric substances (EPS) of the activated sludge acclimated in a sequential batch reactor (SBR) were explored in batch mode. The structure of the extracellular products would change with different aeration methods or aeration rates. The proportion of SMP of most oxygen aerated sludge was less than 10%, while that in air aerated sludge was as high as 30–40%. The proportion of TB-EPS decreased from 56.95% to 30.63%, and the proportion of LB-EPS increased obviously with the increase of oxygen aeration rate. The contents of the protein (PN) and the polysaccharide (PS) of extracellular products with oxygen aeration were significantly different, and the PN was much higher than PS (p < 0.05). The zeta potential of each component in activated sludge was negative, gradually decreasing with the progress of biological treatment. The fluorescence peaks in SMP, LB-EPS and TB-EPS with pure oxygen aeration were attributed to tryptophan PN-like and humic acid-like fractions. The results showed that the proportion of the components in the extracellular products could be regulated by adjusting the aeration rate and aeration mode, so as to optimize the treatment process of activated sludge. HIGHLIGHTS SMP with pure oxygen aerated effluent was lower than that of air aeration.; The proportion of TB-EPS was higher under low aeration rate with pure oxygen aeration.; PN was much higher than PS with pure oxygen aeration.; Zeta potential was related to both the total amount of extracellular products and the PN content.;
format	article
author	Jia-Ying He Hong-Ling Zhang Hong Wang Ya-Qi Hu Yong Zhang
author_facet	Jia-Ying He Hong-Ling Zhang Hong Wang Ya-Qi Hu Yong Zhang
author_sort	Jia-Ying He
title	Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode
title_short	Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode
title_full	Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode
title_fullStr	Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode
title_full_unstemmed	Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode
title_sort	characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/3d94395cb04640abb3ea99aaf9de2eeb
work_keys_str_mv	AT jiayinghe characteristicsoftheextracellularproductsofpureoxygenaeratedactivatedsludgeinbatchmode AT honglingzhang characteristicsoftheextracellularproductsofpureoxygenaeratedactivatedsludgeinbatchmode AT hongwang characteristicsoftheextracellularproductsofpureoxygenaeratedactivatedsludgeinbatchmode AT yaqihu characteristicsoftheextracellularproductsofpureoxygenaeratedactivatedsludgeinbatchmode AT yongzhang characteristicsoftheextracellularproductsofpureoxygenaeratedactivatedsludgeinbatchmode
_version_	1718443724742066176

Characteristics of the extracellular products of pure oxygen aerated activated sludge in batch mode

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