Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment

In this paper, combined with the addition of ethylenediaminetetraacetic acid (EDTA), the electrochemical treatment of waste activated sludge (WAS) was investigated to explore its effect on the release of phosphorus (P) from WAS. The results showed that during the electrochemical treatment, the addit...

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Autores principales:	Yunfeng Xu, Fanglu Hu, Xin Wang, Yangwei Qu, Lu Xu, Qiang Liu
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	electrochemical-edta treatment extracellular polymeric substances metal ions organophosphorus phosphorus release waste activated sludge Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/5880d230caac4afc80c57eb95d4a49b7
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id	oai:doaj.org-article:5880d230caac4afc80c57eb95d4a49b7
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spelling	oai:doaj.org-article:5880d230caac4afc80c57eb95d4a49b72021-11-06T10:56:01ZImprovement of phosphorus release from sludge by combined electrochemical-EDTA treatment0273-12231996-973210.2166/wst.2021.107https://doaj.org/article/5880d230caac4afc80c57eb95d4a49b72021-04-01T00:00:00Zhttp://wst.iwaponline.com/content/83/8/1824https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In this paper, combined with the addition of ethylenediaminetetraacetic acid (EDTA), the electrochemical treatment of waste activated sludge (WAS) was investigated to explore its effect on the release of phosphorus (P) from WAS. The results showed that during the electrochemical treatment, the addition of EDTA could significantly promote the release of P from the WAS to the supernatant, the optimal amount of EDTA was 0.4 g/g total suspended solids (TSS), when the release of total dissolved phosphorus (TDP), organic phosphorus (OP) and molybdate reactive phosphorus (PO43−-P) were 187.30, 173.84 and 13.46 mg/L, respectively. OP was the most likely form of P to be released during this process. Moreover, combined electrochemical-EDTA treatment could promote the release of P and metal ions from extracellular polymeric substances (EPSs) to the supernatant, and increase the solubility and disintegration of sludge. EDTA chelated the metal ions of sludge flocs and phosphate precipitates to cause sludge floc decomposition, thereby promoting the release of P from WAS. HIGHLIGHTS Successfully developed combined electrochemical-EDTA treatment technology to promote the release of P in WAS.; OP was the most likely phosphorus form to be released.; Changes of P and metal elements content in EPSs had been investigated.; EDTA destroys sludge flocs and promotes P release by chelating heavy metals.;Yunfeng XuFanglu HuXin WangYangwei QuLu XuQiang LiuIWA Publishingarticleelectrochemical-edta treatmentextracellular polymeric substancesmetal ionsorganophosphorusphosphorus releasewaste activated sludgeEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 8, Pp 1824-1833 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electrochemical-edta treatment extracellular polymeric substances metal ions organophosphorus phosphorus release waste activated sludge Environmental technology. Sanitary engineering TD1-1066
spellingShingle	electrochemical-edta treatment extracellular polymeric substances metal ions organophosphorus phosphorus release waste activated sludge Environmental technology. Sanitary engineering TD1-1066 Yunfeng Xu Fanglu Hu Xin Wang Yangwei Qu Lu Xu Qiang Liu Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment
description	In this paper, combined with the addition of ethylenediaminetetraacetic acid (EDTA), the electrochemical treatment of waste activated sludge (WAS) was investigated to explore its effect on the release of phosphorus (P) from WAS. The results showed that during the electrochemical treatment, the addition of EDTA could significantly promote the release of P from the WAS to the supernatant, the optimal amount of EDTA was 0.4 g/g total suspended solids (TSS), when the release of total dissolved phosphorus (TDP), organic phosphorus (OP) and molybdate reactive phosphorus (PO43−-P) were 187.30, 173.84 and 13.46 mg/L, respectively. OP was the most likely form of P to be released during this process. Moreover, combined electrochemical-EDTA treatment could promote the release of P and metal ions from extracellular polymeric substances (EPSs) to the supernatant, and increase the solubility and disintegration of sludge. EDTA chelated the metal ions of sludge flocs and phosphate precipitates to cause sludge floc decomposition, thereby promoting the release of P from WAS. HIGHLIGHTS Successfully developed combined electrochemical-EDTA treatment technology to promote the release of P in WAS.; OP was the most likely phosphorus form to be released.; Changes of P and metal elements content in EPSs had been investigated.; EDTA destroys sludge flocs and promotes P release by chelating heavy metals.;
format	article
author	Yunfeng Xu Fanglu Hu Xin Wang Yangwei Qu Lu Xu Qiang Liu
author_facet	Yunfeng Xu Fanglu Hu Xin Wang Yangwei Qu Lu Xu Qiang Liu
author_sort	Yunfeng Xu
title	Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment
title_short	Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment
title_full	Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment
title_fullStr	Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment
title_full_unstemmed	Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment
title_sort	improvement of phosphorus release from sludge by combined electrochemical-edta treatment
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/5880d230caac4afc80c57eb95d4a49b7
work_keys_str_mv	AT yunfengxu improvementofphosphorusreleasefromsludgebycombinedelectrochemicaledtatreatment AT fangluhu improvementofphosphorusreleasefromsludgebycombinedelectrochemicaledtatreatment AT xinwang improvementofphosphorusreleasefromsludgebycombinedelectrochemicaledtatreatment AT yangweiqu improvementofphosphorusreleasefromsludgebycombinedelectrochemicaledtatreatment AT luxu improvementofphosphorusreleasefromsludgebycombinedelectrochemicaledtatreatment AT qiangliu improvementofphosphorusreleasefromsludgebycombinedelectrochemicaledtatreatment
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Improvement of phosphorus release from sludge by combined electrochemical-EDTA treatment

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