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가열 처리한 정수 슬러지를 이용한 하수 처리수 중의 인 제거
서정인 ( Jung In Suh ),윤호석 ( Ho Seok Yoon ),안정임 ( Jeong Im An ) 한국수처리학회 2012 한국수처리학회지 Vol.20 No.2
The aims of this study was to investigate the effectiveness of heated alum sludge for removal of phosphorus in effluent from sewage treatment plant. The alum sludge was taken from water purification plant which located in Daegu City. In batch adsorption tests were conducted using a effluent of sewage treatment plant (STP) and potassium dihydrogen phosphate solution(PDP). The maximum adsorption capacity for total phosphorus(T-P) from the Langmuir isotherm plot was 2.96mg T-P/g sludge for STP and 6.26mg I-PIg sludge for PDP. It implied that the competing components in the STP did affect the T-P adsorption in the heated alum sludge. Subsequently, a continuous flow tests were conducted at a 3.5nf/nf/day and a cumulative T-P loading of 6.86mg T-P/g sludge for STP. The heated alum sludge removed over 40% T-P for 70 days and it was 82% of the maximum adsorption capacity of T-P obtained in the batch adsorption tests. And during the removal of T-P process, aluminum leaching from heated alum sludge was not detected. These results indicated that heated alum sludge can further be used as a adsorbent material for removal of T-P.
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