Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching

Dewatering of sludge is a key problem that must be solved in the sewage sludge disposal industry. In this study, a series of process optimization tests were conducted to learn how to improve sludge treatment. The optimum process of sludge leaching treatment was studied in a specially designed 100-L...

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Autores principales:	Jie Zhao, Jingqing Gao, Junzhao Liu
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	dewaterability orthogonal analysis polysorbate 20 sludge bioleaching sodium thiosulfate Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/57684536baa448798bae7cf3fdaf6098
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spelling	oai:doaj.org-article:57684536baa448798bae7cf3fdaf60982021-11-06T10:42:25ZUse of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching0273-12231996-973210.2166/wst.2020.602https://doaj.org/article/57684536baa448798bae7cf3fdaf60982021-02-01T00:00:00Zhttp://wst.iwaponline.com/content/83/3/595https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Dewatering of sludge is a key problem that must be solved in the sewage sludge disposal industry. In this study, a series of process optimization tests were conducted to learn how to improve sludge treatment. The optimum process of sludge leaching treatment was studied in a specially designed 100-L reactor system. Four factors were investigated and nine batches of bioleaching tests were run at three levels of these factors. Orthogonal experiments showed that the effect of sludge return ratio and aeration rate on the sludge moisture content was significant and hydraulic retention time (HRT) had a clear effect, but nutrient types had a reduced effect on the moisture content of sludge. The primary and secondary order of each factor is reflux ratio > aeration rate > HRT > nutrient type. Under the optimal process, three batches of sludge were processed and the moisture content of the filter press cake was reduced to less than 60%, the organic matter content reduced to below 5%, and the concentration of heavy metals (Cu, Zn, Pb, and Cr) was much lower than the agricultural standard limit, which is suitable for landscaping, composting, and incineration power generation and other resource applications.Jie ZhaoJingqing GaoJunzhao LiuIWA Publishingarticledewaterabilityorthogonal analysispolysorbate 20sludge bioleachingsodium thiosulfateEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 3, Pp 595-609 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dewaterability orthogonal analysis polysorbate 20 sludge bioleaching sodium thiosulfate Environmental technology. Sanitary engineering TD1-1066
spellingShingle	dewaterability orthogonal analysis polysorbate 20 sludge bioleaching sodium thiosulfate Environmental technology. Sanitary engineering TD1-1066 Jie Zhao Jingqing Gao Junzhao Liu Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching
description	Dewatering of sludge is a key problem that must be solved in the sewage sludge disposal industry. In this study, a series of process optimization tests were conducted to learn how to improve sludge treatment. The optimum process of sludge leaching treatment was studied in a specially designed 100-L reactor system. Four factors were investigated and nine batches of bioleaching tests were run at three levels of these factors. Orthogonal experiments showed that the effect of sludge return ratio and aeration rate on the sludge moisture content was significant and hydraulic retention time (HRT) had a clear effect, but nutrient types had a reduced effect on the moisture content of sludge. The primary and secondary order of each factor is reflux ratio > aeration rate > HRT > nutrient type. Under the optimal process, three batches of sludge were processed and the moisture content of the filter press cake was reduced to less than 60%, the organic matter content reduced to below 5%, and the concentration of heavy metals (Cu, Zn, Pb, and Cr) was much lower than the agricultural standard limit, which is suitable for landscaping, composting, and incineration power generation and other resource applications.
format	article
author	Jie Zhao Jingqing Gao Junzhao Liu
author_facet	Jie Zhao Jingqing Gao Junzhao Liu
author_sort	Jie Zhao
title	Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching
title_short	Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching
title_full	Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching
title_fullStr	Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching
title_full_unstemmed	Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching
title_sort	use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/57684536baa448798bae7cf3fdaf6098
work_keys_str_mv	AT jiezhao useofpolysorbate20andsodiumthiosulfatetoenhancesewagesludgedewaterabilitybybioleaching AT jingqinggao useofpolysorbate20andsodiumthiosulfatetoenhancesewagesludgedewaterabilitybybioleaching AT junzhaoliu useofpolysorbate20andsodiumthiosulfatetoenhancesewagesludgedewaterabilitybybioleaching
_version_	1718443794897043456

Use of polysorbate 20 and sodium thiosulfate to enhance sewage sludge dewaterability by bioleaching

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