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http://dx.doi.org/10.5668/JEHS.2009.35.1.058

The Effect of the Use of Sodium Hypochlorite and Iron Salts on Sewage Sludge Dewaterability  

Sung, Il-Wha (Department of Sanitary & Environmental System Engineering, Gachon University of Medicine and Science)
Publication Information
Journal of Environmental Health Sciences / v.35, no.1, 2009 , pp. 58-63 More about this Journal
Abstract
This study investigated improvement to sludge dewaterability and coagulation for sewage treatment plant sludge by using sodium hypochlorite solution (NaOCl), ferric sulfate [$Fe_2(SO_4)_3$] and zeolite. The specific resistance to filtration(SRF), chloride, pH and turbidity were used to evaluate the sludge dewatering behaviors. The results of study were as follows: By varying the amount of NaOCl added the optimum result in terms of enhancement for pretreatment 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 $1.7{\times}10^7sec^2/g$. It was observed that injecting zeolite into sludge was effective in improving the dewaterability of sludge.
Keywords
dewaterability; sewage sludge; sodium hypochlorite solution; zeolite;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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