Preliminary Studies on the Bioremediation of Steel Sludge by Effective Microorganisms

Posted on 08 February 2013
 

Preliminary Studies on the Bioremediation of Steel Sludge by Effective Microorganisms
Preliminary Studies on the Bioremediation of Steel Sludge by Effective Microorganisms BY TEOH KHENG SWEE1,*, KONG ERN HUN2 SYNOPSIS This paper summarizes the findings from a preliminary study on the application of Effective Microorganism Activated Solution (EMAS) on steel sludge heavy metals leaching, pH, oil and grease extraction to the leached solution and conformance to the Kualiti Alam Landfill, KA's Landfill Standard. Specially cultured EMAS was used for all the treatments at various levels of EMAS concentration and an anaerobic condition was maintained during the treatments. Zinc concentration for both diluted 20% EMAS and diluted 30% EMAS treated steel sludge that leached out to the environment showed increment up to almost ten folds while nickel, copper and barium concentration nearly doubled relative to the untreated steel sludge. pH of steel sludge after treatment with diluted 30% EMAS was 7.0 whereas the same treated with diluted 20% EMAS was 7.4 while oil and grease extraction amount reduced by 41.8% and 55.8% respectively relative to untreated steel sludge. Reactions between steel sludge and EMAS produced visible white fungus colonies and sludge layer. The study indicated that concentration of heavy metals leached out from steel sludge to the environment was higher with increasing percentage of EMAS even though it was still well within KA's Landfill limit. However, less oil and grease were extracted out. 2011 ESCO Seminar

 

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