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朴曾石,孫聖涉,朴勝祚 동아대학교 환경문제연구소 1992 硏究報告 Vol.15 No.2
For the purpose of removing the color of wastewater containingpigment, the wastewater was electrolyzed in BPBE Cell of batch and continous type. Experimental results were summarized as follows : 1. When the wastewater containing pigment having 250㎎/l of the concentration of color was electrolyzed in BPBE Cell of batch type, suitable current value was 0.5A and than removal rate of color was 98.4%, the removal rate of Zinc, Lead and Chromium was average 3596, respectively. 2. At the result of experiments with varying pH at current 0.5A on the BPBE Cell of batch type, suitable pH was 7 and than removal rate of color was 98.8%, the removal rate of Zinc, Lead, and Chromium was average 55%, respectively. 3. When the wastewater containing pigment was electrolyzed in BPBE Cell of continuous type, the most removal rate of color at the flow rate of 5ml/min was 98.4%.
조영희,손성섭,박승조 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.2
Sludge conditioning is important to sludge disposal and treatment with it's profits in cost and efficiency. This study was carried out to confirm the dewatering ability of the microbiological conditioning of sludge. The microorganism, Sphaerotilus natans, Bacillus subtilis and E. coli, were used in aerobic and anaerobic reactors, and each dewatering ability with specific resistance coefficient were investgated. The experimental results were as follows ; 1) Dewatering abilities of raw sludge without any conditioner were following results at the retention time of one to four days. 29.24%, 20.45%, 16.20%, 7.34% at aerobic reactor 23.02%, 28.22%, 35.75%, 16.85% at anaerobic reactor 2) The maximum dewatering abilities of conditioned sludge with the dosage of Sphaerotilus natans, Bacillus subtilis and E. coli were varied as follows ; 48.42%, 52.29%, 47.05% at aerobic reactor 53.96%, 61.45%, 46.10% at anaerobic reactor 3) The microorganism conditioner of Sphaerotilus natans changed "b" value from 0.0443 sec/㎝^(6) to 0.0212 sec/㎝^(6) in aerobic reactor and Bacillus subtilis to 0.0232 sec/㎝^(6) in anaerobic reactor at the retention time of one day. The "b" values of raw sludge were changed from 0.0443 sec/㎝^(6) to 0.0391 sec/㎝^(6), 0.0257 sec/㎝^(6) and 0.0124 sec/㎝^(6) with each dosage of polymer as chemical conditionera, 10㎎/ℓ, 50㎎/ℓ and 75㎎/ℓ.