Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration

The effects of thermally and Fe(II) activated potassium persulfate (PPS) on sludge dewatering performance were compared systematically. Sludge dewaterability was monitored by measuring capillary suction time (CST) and sludge specific resistance to filtration (SRF), and the degradation effect was cha...

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Autores principales:	Shaodong Guo, Long Zhou, Yuxin Huang, Xinghu Huang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	activated methods extracellular polymeric substances (eps) potassium persulfate (pps) sludge condition sludge dewatering performance Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/9a41fe2b47514b3492937d5581345307
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spelling	oai:doaj.org-article:9a41fe2b47514b3492937d55813453072021-11-06T11:22:25ZInsight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration0273-12231996-973210.2166/wst.2021.337https://doaj.org/article/9a41fe2b47514b3492937d55813453072021-09-01T00:00:00Zhttp://wst.iwaponline.com/content/84/6/1464https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732The effects of thermally and Fe(II) activated potassium persulfate (PPS) on sludge dewatering performance were compared systematically. Sludge dewaterability was monitored by measuring capillary suction time (CST) and sludge specific resistance to filtration (SRF), and the degradation effect was characterized by chemical oxygen demand (COD), total organic carbon (TOC), ammonia nitrogen (NH4+-N) and extracellular polymeric substances (EPS). The change of extracellular polymer substance (EPS) including soluble, loosely bound and tightly bound EPS (S-EPS, LB-EPS and TB-EPS) with time and PPS dosage was monitored to discuss the oxidation efficiency of thermally and Fe(II) activated PPS. Sludge supernatant was analyzed by three-dimensional fluorescence excitation–emission spectra (3D-EEM) to confirm the protein transformation. The result showed that sludge dewaterability in terms of CST and SRF were enhanced with increasing PPS dosage and condition time of two activated methods. While Fe(II) activated PPS could reduce sludge CST and SRF to preferred values at low PPS dosage and short condition time. Meanwhile, sludge degradation effect was also more obvious. Mechanically, sludge TB-EPS in proteins and polysaccharides converted to SB-EPS was faster with Fe(II) activated PPS. In addition, thermally activated PPS tended to oxidize the protein in the supernatant first. HIGHLIGHTS Thermal and Fe(II) activated potassium persulfate were used to condition sludge.; Fe(II) activated potassium persulfate showed higher efficiency with lower dosage.; Thermally activated persulfate obtained consistent results over a long duration.;Shaodong GuoLong ZhouYuxin HuangXinghu HuangIWA Publishingarticleactivated methodsextracellular polymeric substances (eps)potassium persulfate (pps)sludge conditionsludge dewatering performanceEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 6, Pp 1464-1476 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	activated methods extracellular polymeric substances (eps) potassium persulfate (pps) sludge condition sludge dewatering performance Environmental technology. Sanitary engineering TD1-1066
spellingShingle	activated methods extracellular polymeric substances (eps) potassium persulfate (pps) sludge condition sludge dewatering performance Environmental technology. Sanitary engineering TD1-1066 Shaodong Guo Long Zhou Yuxin Huang Xinghu Huang Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration
description	The effects of thermally and Fe(II) activated potassium persulfate (PPS) on sludge dewatering performance were compared systematically. Sludge dewaterability was monitored by measuring capillary suction time (CST) and sludge specific resistance to filtration (SRF), and the degradation effect was characterized by chemical oxygen demand (COD), total organic carbon (TOC), ammonia nitrogen (NH4+-N) and extracellular polymeric substances (EPS). The change of extracellular polymer substance (EPS) including soluble, loosely bound and tightly bound EPS (S-EPS, LB-EPS and TB-EPS) with time and PPS dosage was monitored to discuss the oxidation efficiency of thermally and Fe(II) activated PPS. Sludge supernatant was analyzed by three-dimensional fluorescence excitation–emission spectra (3D-EEM) to confirm the protein transformation. The result showed that sludge dewaterability in terms of CST and SRF were enhanced with increasing PPS dosage and condition time of two activated methods. While Fe(II) activated PPS could reduce sludge CST and SRF to preferred values at low PPS dosage and short condition time. Meanwhile, sludge degradation effect was also more obvious. Mechanically, sludge TB-EPS in proteins and polysaccharides converted to SB-EPS was faster with Fe(II) activated PPS. In addition, thermally activated PPS tended to oxidize the protein in the supernatant first. HIGHLIGHTS Thermal and Fe(II) activated potassium persulfate were used to condition sludge.; Fe(II) activated potassium persulfate showed higher efficiency with lower dosage.; Thermally activated persulfate obtained consistent results over a long duration.;
format	article
author	Shaodong Guo Long Zhou Yuxin Huang Xinghu Huang
author_facet	Shaodong Guo Long Zhou Yuxin Huang Xinghu Huang
author_sort	Shaodong Guo
title	Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration
title_short	Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration
title_full	Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration
title_fullStr	Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration
title_full_unstemmed	Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration
title_sort	insight into the comparison of thermally and fe(ii) activated persulfate on sludge dewaterability and disintegration
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/9a41fe2b47514b3492937d5581345307
work_keys_str_mv	AT shaodongguo insightintothecomparisonofthermallyandfeiiactivatedpersulfateonsludgedewaterabilityanddisintegration AT longzhou insightintothecomparisonofthermallyandfeiiactivatedpersulfateonsludgedewaterabilityanddisintegration AT yuxinhuang insightintothecomparisonofthermallyandfeiiactivatedpersulfateonsludgedewaterabilityanddisintegration AT xinghuhuang insightintothecomparisonofthermallyandfeiiactivatedpersulfateonsludgedewaterabilityanddisintegration
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Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration

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