Removal and recovery of heavy metals from sewage sludge via three-stage integrated process.

Chemosphere
H YesilA E Tugtas

Abstract

Heavy metal contamination of sewage sludge is one of the concerns preventing its land application. Traditional processes applied for stabilization of sewage sludge are still inadequate to serve sustainable solutions to heavy metal problem. In this study, fermentation and bioleaching potentials of sewage sludge were investigated in anaerobic reactors for either non-pretreated or ultrasonicated sludge at three different pH regimes (free of pH regulation, acidic, and alkaline). The results of the study revealed that combination of ultrasonication pretreatment and alkaline fermentation performed the best among the other cases, resulting in 33.7% hydrolysis, 10.5% acidification, 11-33% metal leaching, and up to 25% reduction in bioavailability of potentially toxic heavy metals. Bioleaching effluent obtained from the best performing reactor was subjected to membrane-based metal recovery. A supported liquid membrane impregnated with a basic carrier successfully recovered soluble metals from the bioleaching effluent with an efficiency of 39-68%. This study reveals that the proposed three-stage process, ultrasonication pretreatment-alkaline fermentation-supported liquid membrane, effectively produces stable sludge with reduced heavy met...Continue Reading

References

Nov 22, 2005·Waste Management·Sandhya Babel, Dominica del Mundo Dacera
Sep 22, 2006·Water Research·Yinguang ChenGuowei Gu
May 17, 2008·Chemosphere·A P SchwabM K Banks
Sep 26, 2008·Journal of Environmental Quality·Ian L PepperCharles P Gerba
Mar 24, 2009·Journal of Environmental Management·Ashish PathakT R Sreekrishnan
Feb 11, 2015·The Science of the Total Environment·Roel J W MeulepasPiet N L Lens
Aug 7, 2018·The Science of the Total Environment·Ting Yang, Mark E Hodson
Mar 23, 2019·Environmental Science and Pollution Research International·Kun LuoQi Huang
Aug 5, 2019·The Science of the Total Environment·H Yesil, A E Tugtas
Aug 27, 2019·Journal of Environmental Management·François NkinahamiraQian Sun
Nov 24, 2019·The Science of the Total Environment·Yayi YuanDongbo Wang
Mar 18, 2020·Ecotoxicology and Environmental Safety·Xiarong ZhengXiaolong Shen
Feb 13, 2021·Journal of Environmental Management·Rahim MolaeyAdile Evren Tugtas

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