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DOI : 10.17640/KSWST.2014.22.6.3 ,    Vol.22, No.6, 3 ~ 11, 2014
Title
Application Possibility of Coagulant Recovered from Waterworks Sludge by Reforming with Sintering Treatment in the Total Phosphorus Removal Process
서정인 Jung In Suh , 윤호석 Ho Seok Yoon , 이택순 Taek Soon Lee
Abstract
The objective of this study is to investigate the effects of sintering treatment on alum recovery from waterworks sludge. Results show that organic compounds are removed, while aluminum content is increased by approximately 60% when waterworks sludge is sintered for 2hr under 600℃. Sulfuric acid(3N) leaching for 24hr ratio yielded an aluminum concentration of 39,000 mg/L in the sintered sludge. The concentration of aluminum in sintered sludge was 40% higher than that in non-sintered sludge. Also concentration of aluminum in sintered sludge was 40% higher than that in non-sintered sludge at solid/liquid ratio of 100 g/L. When the coagulant recovered from sintered sludge dosed 0.15 mL/L into the influent of total phosphorus removal process, total phosphorus was below effluent quality limits (0.2 mg/L). These results have demonstrated that sintering could be suitable technologies for extraction of high concentration of aluminum from waterworks sludge by using sulfuric leaching.
Key Words
sintering treatment, waterworks sludge, recovered aluminum, sulfuric acid, total phosphorus
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