淨水슬러지를 利用한 下水處理에 關한 硏究

Abstract

Result that achieve study about chemical processing of municipal waste water that use alum sludge is as following. When calculated most suitable amount of each coagulant through Jar Test, 1. Quality of water was CODMn 23.1㎎/ℓ, CODCr 34.7㎎/ℓ, SS 4.1㎎/ℓ,T-N 54.3 ㎎/and T-P 0.98ℓ㎎/ℓ that optimum condition of chemical processing of municipal waste water pours ammonium alum 60㎎/ℓ, polymer coagulant 0.5㎎/ℓor alum 60㎎/ℓ, quicklime 0.4㎎/ℓ. 2. The efficiency of chemical treatment of municipal waste water was COD 47.9～67.9%, SS 55.8～96.4%, T-N 18.8～26.4% and T-P 52.4～92.39%. 3. Municipal waste water processing optimum condition that use H military administration PAC sludge was sludge 20㎖/ℓ, alum 40㎎/ℓ and quicklime 0.6 g/ℓ. Could reduce coagulant dosage 30% reutilizing sludge. Quality of water appeared by CODMn 35.20㎎/ℓ, CODCr 42.2㎎/ℓ, SS 35.8㎎/ℓ, T-N 51.36㎎/ℓ and T-P 2.846㎎/ℓ under optimum condition. 4. At a laboratory, pours quicklime 0.2g/ℓ, alum 40㎎/ℓ in water supply source and made proper alum sludge. It was optimum condition when it is alum sludge 7.5㎖/ℓ, alum 20㎎/ℓ treat municipal waste water by this sludge and is proper alum sludge case of use raw sludge coagulant expenditure about 67% reduce. Processing quality of water is CODMn 22.0㎎/ℓ, CODCr 26.4㎎/ℓ, SS 23.9㎎/ℓ, T-N 48.636㎎/ℓ and T-P 5.11㎎/ℓ.