活性スラッジによる産業廃水の処理に関する研究 : (第3報)糖化酵素廃水の処理について

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When saccharogenic amylase is manufactured from a mold bran by the precipitation method using alcohol, the distilled and the pressed slops are discharged as the main wastes. These slops contain BOD and suspended solids of a high concentration. This paper is concerned with the treatment of slops using activated sludge.The distilled slop had volatile solids of 13,748 ppm and BOD of 13,000 ppm, and the pressed slop contained suspended solids of 3,692 ppm and BOD of 4,500 ppm.From the relationship between the aeration period and the percentage of BOD reduction by the batch wise test, it was found that the maximum BOD loadings of the slops were each 4.0 per cubic meter per day.When the slops were treated continuously within the limits of the maximum loadings, volatile solids and BOD of the distilled slop were reduced 91.5% and 98.2% and suspended solids and BOD of the pressed slop were removed 99.8% and 98.4% respectively.The thermophilic methane fermentation of the distilled slop was also studied. As the results of the continuous operation, it was recognized that the maximum volatile solids loading was 5.5kg per cubic meter per day. At this loading, 600 l of gas containing 58% methane was produced from one kilogram of volatile solids, and BOD was reduced 85% from the original slop.
社団法人日本生物工学会の論文
1964-08-15