Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate

Electrolysis zero-valent iron activated peroxymonosulfate (EZVI-PMS) was applied to enhance sludge dewaterability and disintegration performance. Sludge dewaterability was characterized by capillary suction time (CST), specific resistance to filtration (SRF), and disintegration performance was explo...

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Autores principales:	Shaodong Guo, Yuxin Huang, Long Zhou, Xinghu Huang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	electrolysis zero-valent iron extracellular polymeric substance (eps) peroxymonosulfate (pms) sludge disintegration sludge filterability Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/d01c05a27f8b43608cbd660594cc79ed
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spelling	oai:doaj.org-article:d01c05a27f8b43608cbd660594cc79ed2021-11-06T11:13:59ZImprovement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate0273-12231996-973210.2166/wst.2021.229https://doaj.org/article/d01c05a27f8b43608cbd660594cc79ed2021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/2/458https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Electrolysis zero-valent iron activated peroxymonosulfate (EZVI-PMS) was applied to enhance sludge dewaterability and disintegration performance. Sludge dewaterability was characterized by capillary suction time (CST), specific resistance to filtration (SRF), and disintegration performance was explored by measuring sludge DNA content, ammonia nitrogen, chemical oxygen demand (COD), extracellular polymeric substances (EPS) and dissolved organic carbon (DOC). EPS, including soluble EPS (SB-EPS), loosely bound EPS (LB-EPS), and tightly bound EPS (TB-EPS) were analyzed by three dimensional fluorescence excitation-emission spectrum (3D-EEM) to confirm the proteins' transformation tendency. DOC, protein and polysaccharide in EPSs were quantified to investigate the conditioning mechanism. The results showed that sludge CST and SRF were reduced significantly when the current was 0.2 A and PMS dosage was 130 mg/gDS with the reductions of 43.8% and 74.1%, respectively, and DNA was released from sludge cells to the liquid phase. Mechanically, sludge TB-EPS converted to SB-EPS with DOC in TB-EPS decreasing from 367.0 mg/L to 210 mg/L, while DOC in SB-EPS increased from 44 mg/L to 167.4 mg/L. Besides, the changes of protein and polysaccharide contents in SB-EPS and TB-EPS were similar to DOC, and protein in TB-EPS transformed to other protein-like or organic substances obviously. Highlights Electrochemically activated peroxymonosulfate (PMS) was useful for conditioning.; An electric current of 0.2 A was enough to produce Fe(II) to activate PMS using iron bar as the cathodes.; Electrochemically activated PMS could oxidize extracellular polymeric substances in sludge to enhance sludge dewaterability.;Shaodong GuoYuxin HuangLong ZhouXinghu HuangIWA Publishingarticleelectrolysis zero-valent ironextracellular polymeric substance (eps)peroxymonosulfate (pms)sludge disintegrationsludge filterabilityEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 2, Pp 458-468 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electrolysis zero-valent iron extracellular polymeric substance (eps) peroxymonosulfate (pms) sludge disintegration sludge filterability Environmental technology. Sanitary engineering TD1-1066
spellingShingle	electrolysis zero-valent iron extracellular polymeric substance (eps) peroxymonosulfate (pms) sludge disintegration sludge filterability Environmental technology. Sanitary engineering TD1-1066 Shaodong Guo Yuxin Huang Long Zhou Xinghu Huang Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate
description	Electrolysis zero-valent iron activated peroxymonosulfate (EZVI-PMS) was applied to enhance sludge dewaterability and disintegration performance. Sludge dewaterability was characterized by capillary suction time (CST), specific resistance to filtration (SRF), and disintegration performance was explored by measuring sludge DNA content, ammonia nitrogen, chemical oxygen demand (COD), extracellular polymeric substances (EPS) and dissolved organic carbon (DOC). EPS, including soluble EPS (SB-EPS), loosely bound EPS (LB-EPS), and tightly bound EPS (TB-EPS) were analyzed by three dimensional fluorescence excitation-emission spectrum (3D-EEM) to confirm the proteins' transformation tendency. DOC, protein and polysaccharide in EPSs were quantified to investigate the conditioning mechanism. The results showed that sludge CST and SRF were reduced significantly when the current was 0.2 A and PMS dosage was 130 mg/gDS with the reductions of 43.8% and 74.1%, respectively, and DNA was released from sludge cells to the liquid phase. Mechanically, sludge TB-EPS converted to SB-EPS with DOC in TB-EPS decreasing from 367.0 mg/L to 210 mg/L, while DOC in SB-EPS increased from 44 mg/L to 167.4 mg/L. Besides, the changes of protein and polysaccharide contents in SB-EPS and TB-EPS were similar to DOC, and protein in TB-EPS transformed to other protein-like or organic substances obviously. Highlights Electrochemically activated peroxymonosulfate (PMS) was useful for conditioning.; An electric current of 0.2 A was enough to produce Fe(II) to activate PMS using iron bar as the cathodes.; Electrochemically activated PMS could oxidize extracellular polymeric substances in sludge to enhance sludge dewaterability.;
format	article
author	Shaodong Guo Yuxin Huang Long Zhou Xinghu Huang
author_facet	Shaodong Guo Yuxin Huang Long Zhou Xinghu Huang
author_sort	Shaodong Guo
title	Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate
title_short	Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate
title_full	Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate
title_fullStr	Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate
title_full_unstemmed	Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate
title_sort	improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/d01c05a27f8b43608cbd660594cc79ed
work_keys_str_mv	AT shaodongguo improvementofsludgedewaterabilityanddisintegrationefficiencyusingelectrolyticzerovalentironactivatedperoxymonosulfate AT yuxinhuang improvementofsludgedewaterabilityanddisintegrationefficiencyusingelectrolyticzerovalentironactivatedperoxymonosulfate AT longzhou improvementofsludgedewaterabilityanddisintegrationefficiencyusingelectrolyticzerovalentironactivatedperoxymonosulfate AT xinghuhuang improvementofsludgedewaterabilityanddisintegrationefficiencyusingelectrolyticzerovalentironactivatedperoxymonosulfate
_version_	1718443761519820800

Improvement of sludge dewaterability and disintegration efficiency using electrolytic zero-valent iron activated peroxymonosulfate

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