차아염소산과 철염을 이용한 하수슬러지의 탈수효과

The Effect of the Use of Sodium Hypochlorite aod Iroo Salts on Sewage Sludge Dewaterability

This study investigated improvemεnt to sludge dewaterability and coagulation for sewage treatrnent plant sludge by using sodinrn hypochlorite solution (NaOCl), fε， :rric sulfate [F~(S04)31 andzeolite. le specific resistance to filσa tion(SRF), chloride, pH and turbidity were usεd to evaluate the sludge dεwatering behaviors. The results of study were as follows : By vying the arnount of NaOCl added the opmum result in terms of enhancement for pretreatrnent occurred when 34 mg/l of NaOCl was injected. When the total solids concentration of the sludge was 10,000 mg/l, the optimum ferric sulfate dosage for the sludge dewaterability was 150 mg/l and the corresponding SRF was 1.7x107 sec2/g. It was observed that i ecting zeolite into sludge was effective in improving the dewaterability of sludge.