特殊産業廃水の微生物処理に関する研究 : (第8報)コンビナート共同処理について

概要

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An activated sludge method for wastes from industrial petroleum combinat fctories and woolen fabric factories was studied in order to treat them collectively. Wastes which had been sent from each factory were mixed with proportions of the discharged volume and this total waste was tested. The result of the analysis indicated a BOD, of 210-250 ppm, COD, of 280-320 ppm, and n-hexane soluble substance, of 240 ppm and it had a petrolic smell. It was found if sludge concentration was 4,000 ppm on the activated sludge method and retention time was 4 hours the removal of BOD was 95%, that of COD 71%, that of n-hexane soluble substance more than 99%, and the treated liquor had no smell. It appears the new sludge formed in this condition can be expressed in the following equation.ΔS=0.75y-0.05S_a ΔS; weight of formed new sludge (mg)y; removal BOD (ppm)S_a; avarage sludge concentration (ppm)The plant showing in Fig. 2 was necessary to treat 17,000 tons of the total waste per day by biological treatment and it was estimated that the cost of treatment was 11-15 yen per ton of waste.
社団法人日本生物工学会の論文
1967-09-25