Alum과 PACl을 이용한 응집처리
Chemical Coagulation Treatment Using Alum and PACl in Complex Wastewater
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In order to treat the complex wastewater containing organic compound and solids, pre-treatment system associated with molecular separation process were investigated. The reductions of COD and turbidity were obtained after coagulation processes using Alum (Aluminium sulfate, Al2(SO4)2·18H2O) and PACl (poly aluminium chloride as 17% Al2O3). The results of study were as follows : using variable dosage of Alum, COD removal was highest at 4,000 ㎎/ℓ, and the reduction of COD and turbidity was 42% and 92%, respectively. The optimum coagulation would be effective at pH 7.3 than pH 9.0 by the addition of alum at a concentration of 6,000 ㎎/ℓ and PACl was add at 4.25% in raw complex wastewater with 2,000 ㎎/ℓ alum at pH 7.3, the reduction of COD was reduced by 32%. But coagulation aid experiments indicated that PACl would be more effective in sludge separation ability than COD removal efficiency.
Abstract
In order to treat the complex wastewater containing organic compound and solids, pre-treatment system associated with molecular separation process were investigated. The reductions of COD and turbidity were obtained after coagulation processes using Alum (Aluminium sulfate, Al2(SO4)2·18H2O) and PACl (poly aluminium chloride as 17% Al2O3). The results of study were as follows : using variable dosage of Alum, COD removal was highest at 4,000 ㎎/ℓ, and the reduction of COD and turbidity was 42% and 92%, respectively. The optimum coagulation would be effective at pH 7.3 than pH 9.0 by the addition of alum at a concentration of 6,000 ㎎/ℓ and PACl was add at 4.25% in raw complex wastewater with 2,000 ㎎/ℓ alum at pH 7.3, the reduction of COD was reduced by 32%. But coagulation aid experiments indicated that PACl would be more effective in sludge separation ability than COD removal efficiency.
참고문헌 (13)
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