活性スラッジによる産業廃水の処理に関する研究 : (第4報)ビール廃水の処理について

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In a beer brewery, the major part of the wastes are discharged from the processes of malting, mashing, fermentation and bottle washing. In Japan, the amount of the total waste to be treated has reached 2,000 to 7,000m^3 per day. This paper is concerned with the treatment for the total waste by activated sludge. The components of the waste used were suspended solids of 396 ppm, with a total nitrogen content of 24 ppm, COD of 550 ppm and BOD of 620 ppm. The batchwise test was conducted under the conditoins of the initial BOD of 335 ppm., Kd value of 5.8×10^<-7>, with a sludge concentration of 6.0% and a temperature of 25℃. From the relationship between the aeration period and percentage of BOD reduction, it was found that the maximum BOD loading of the waste was 4.0 kg per cubic meter per day, and within the limits of the loading, more than 95% of the BOD was reduced from the raw waste. The waste was treated continuously with a BOD loading of 2.5 kg per cubic meter per day for 5 days. The final effluent was colorless, transparent and odorless, and suspended solids, total nitrogen, and more than 95% COD and BOD were removed respectively from the original waste.The sedimentation rate of the activated sludge was high, and the sludge volume index ranged from 40 to 50. The amont of the sludge produced during the purification process was about 0.06% in dryness of the total weight of the waste used, and that was equivalent to the total weight of BOD added.
社団法人日本生物工学会の論文
1964-10-25

活性スラッジによる産業廃水の処理に関する研究 : (第4報)ビール廃水の処理について

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