소성 처리한 정수슬러지에서 회수한 응집제의 총인 처리시설에서의이용 가능성에 관한 검토 = Application Possibility of Coagulant Recovered from Waterworks Sludge by Reforming with Sintering Treatment in the Total Phosphorus Removal Process

다국어 초록 (Multilingual 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.