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Volume Reduction of Waste Water Sludge using Electrolysis  

Lee, Byungheon (Department of Environmental System Engineering, Pukyong National University)
Bang, Myunghwan (Department of Environmental System Engineering, Pukyong National University)
Kim, Geonha (Department of Civil and Environmental Engineering, Hannam University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.2, 2006 , pp. 264-270 More about this Journal
Abstract
In this research, volume reduction of activated sludge using electrolysis was studied to find an optimum condition using lab scale experiments. Wasted sludge was treated by electrolysis with controlling current density, chloride concentration, electrode distance, and reaction time. Volume of return sludge was reduced by 9.79% in average while maximum was 16.7%. Sludge volume reduction efficiency was affected by current density and reaction time. It was reversely proportional to the electrode distance. Especially current density was effective on the system performance significantly. Electric conductivity, salinity and COD were increased by electrolysis implying sludge disintegrated and converted to COD in part. An empirical equation for total solid removal efficiency by electrolysis was proposed by multiple linear regression analysis as: $TS_{rem}$(%) = 5.534 ${\times}$ current density (A/l) + 0.178 ${\times}$ reaction time (m) + 2.758.
Keywords
Eletrolysis; Empirical equation; Sludge; Volume reduction;
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Times Cited By KSCI : 1  (Citation Analysis)
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