Combination of ultrasound and Fenton treatment for improving the hydrolysis and acidification of waste activated sludge

The effects of ultrasound (US), Fenton treatment, and combined US/Fenton treatment as physicochemical pretreatment processes for waste activated sludge (WAS) hydrolysis and acidification were investigated in this study. The soluble carbohydrate concentrations after US/Fenton treatment were 2.36-fold...

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Veröffentlicht in:RSC advances 2015-06, Vol.5 (6), p.48468-48473
Hauptverfasser: Bao, Hongxu, Jiang, Lei, Chen, Chunxiao, Yang, Chunxue, He, Zhangwei, Feng, Yaodong, Cai, Weiwei, Liu, Wenzong, Wang, Aijie
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container_end_page 48473
container_issue 6
container_start_page 48468
container_title RSC advances
container_volume 5
creator Bao, Hongxu
Jiang, Lei
Chen, Chunxiao
Yang, Chunxue
He, Zhangwei
Feng, Yaodong
Cai, Weiwei
Liu, Wenzong
Wang, Aijie
description The effects of ultrasound (US), Fenton treatment, and combined US/Fenton treatment as physicochemical pretreatment processes for waste activated sludge (WAS) hydrolysis and acidification were investigated in this study. The soluble carbohydrate concentrations after US/Fenton treatment were 2.36-fold, 2.17-fold and 17.11-fold more than that obtained by the Fenton treatment, US and control tests, respectively. The corresponding concentrations of soluble protein after US/Fenton treatment were 2.43-fold, 1.47-fold and 13.37-fold more than that obtained by the Fenton treatment, US and control tests, respectively. The degree of sludge disintegration (DD COD ) for the US/Fenton treatment was 15.4%, whereas it was only 9.97% and 3.18% for the US and Fenton tests. The maximum accumulation of volatile fatty acids (VFAs) was obtained by the US/Fenton pretreatment (4594 mg COD L −1 ), which presented obvious advantages over US (3485 mg COD L −1 ) and Fenton (2700 mg COD L −1 ) treatments. The combination of the US and Fenton treatments had a synergetic effect on improving the hydrolysis and subsequent acidification of WAS. US/Fenton had a synergetic effect on improving the hydrolysis and subsequent acidification of WAS.
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US/Fenton had a synergetic effect on improving the hydrolysis and subsequent acidification of WAS.</abstract><doi>10.1039/c5ra05791d</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record>
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source Royal Society Of Chemistry Journals 2008-
subjects Acidification
Activated sludge
Fatty acids
Hydrolysis
Pretreatment
Sludge
Ultrasound
Wastes
title Combination of ultrasound and Fenton treatment for improving the hydrolysis and acidification of waste activated sludge
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