パン酵母培養廃液の処理および利用に関する研究 : (第5報)活性スラッジ法における水温の影響について

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From the results of practical treatments of baker's yeast culture waste by the activated sludge process in its disposing plants during the past year, a significant difference was noted between water temperatures in winter (8〜12℃) and in summer (25〜27℃) in the aeration tanks. The purpose of the present investigation was to study the ffect of water temperature on the function of activated sludge. The results of these studies are summarized as follow : 1. In cace of acclimation of activated sludge at 9°, 18°and 27°, differences in sedimentation because of different temperatures began to appear on the 5th day. The higher the temperature was in the tank, the more the settling activated sludge was obtained. 2. BOD removal efficiency of activated sludge was affected largely by water temperature during acclimation and treatment. Especially, it depended much more on the temperature during treatment than acclimation. The lower the temperature, went down the lower the efficiency became. 3. With a constant load of BOD, oxygen consumption of activated sludge depended on the water temperature during treatment and it had notching to do with the temperature during acclimation. The oxygen consumption increased lineally in accordance with the rise of temperature during treatment. 4. As the results of examinations of various types of activated sludge, ranging from a rich one in settling to a bulked one, no remarkable variation in number of filamentous microorganisms was observed under the microscope, and the bulked sludge contained more carbohydrate and less nitrogen than the normal sludge.
社団法人日本生物工学会の論文
1968-07-25

パン酵母培養廃液の処理および利用に関する研究 : (第5報)活性スラッジ法における水温の影響について

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