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A Comparative Study of Dewatering Aid for Digested Sludge by using A Starfish and A Shell  

Lee, Jae-Kwang (Division of Radiation Application, Korea Atomic Energy Research Institute)
Yoo, Dae-Hyun (Division of Radiation Application, Korea Atomic Energy Research Institute)
Lee, Myeon-Ju (Division of Radiation Application, Korea Atomic Energy Research Institute)
Kang, Ho (Chungnam Univ.)
Publication Information
Resources Recycling / v.13, no.3, 2004 , pp. 12-18 More about this Journal
Abstract
A study on the enhancement of the dewaterability of sewage sludge was carried out by using the sea waste materials as a dewatering aid. It was made from a starfish and a shell by heating at $105∼700 ^{\circ}C$ and centrifuge and belt press were used as a mechanical dewatering process. The moisture content of sludge cake was reduced by 15∼22% (w/w) after addition of the dewatering aid at the dose of 1∼8 g/100mL of digested sludge. CST (capillary suction time) was measured to evaluate the effect of dewatering aid on sludge dewatering properties. CST was reduced after addition of a shell while increased after addition of a starfish. Enhancement of dewaterability after addition of a shell was better than that of a starfish. The heating temperature effect of the dewatering aid on dewaterability was not clear.
Keywords
aid; sludge; starfish; shell; dewaterability;
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