活性スラッジによる産業廃水の処理に関する研究 : (第9報) 澱粉廃水の処理について(生物化学工学特集号-I廃液処理)

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The activated sludge treatment for the protein and the flume waters dischrged from sweet and white potato starch plant were investigated.The maximum loadings of sweet and white potato protein waters wer 0.9 and 1.3 kg/m^3/day shown as C.O.D. and 1.3 and 2.6kg/m^3/day shown as B.O.D. with sludge concentration of 5% and temperatures of 25℃.It was found that when the B.O.D. values of the protein waters were less than about 7,000 ppm, the purification efficiencies had no asociation with concentration of the wastes. The effects of activated sludge treatment for the wastes were remarkable : More than 95% of the protein B.O.D. the flume and the mixed waters were removed.However, when the protein waters treated continuously beyond the limits of the maximum laodings, the sludges caused a rapid bulk and settling while activity of the sludges was decreased.The optimum temeprature for activated sludge treatment was from 20 to 35℃.At this time, about 95% of the white potato C.O.D. protein water removed. However, when temeprature fell below 15℃, the percentage of C.O.D. removal was 10% less when compared with that under optimum temperature.The settling of the nomal sludges was high, and sludge volume indexes were from 30 to 60. The amounts of excess sludges produced during the purification processes were about one kilogram respectively in the sweet potato protein water and the flume water, and about 0.7 kilogram in the white potato protein water per kilogram of BOD treated. The quantity of total nitrogen contained in the dried sludges from the proetin waetrs was about 7%.
社団法人日本生物工学会の論文
1965-06-25

活性スラッジによる産業廃水の処理に関する研究 : (第9報) 澱粉廃水の処理について(生物化学工学特集号-I廃液処理)

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