活性スラッジ中の粘質物に関する研究 : (第1報)粘質物の性質およびその生成について

概要

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The characteristics and production of the mucilate in activated sludge which has been applied for practical treatment was studied. Results of the present investigation may be summarized as follows : 1. The mucilage could be extracted with 1N NaOH. 2. Viscosity of the mucilage was found to be constant at the range from neutral to alkali and, however, decreased at pH range less than 5,according to pH falls.The viscosity was stable at pH between 5 and 9. 3. Main components of volatile solid in crude mucilage were saccharide and protein. 4. The production of more mucilage in activated sludge was occurred on the lower MLSS and higher BOD loading. The production continued to increase for 7 days in activated sludge cultured under the conditions described above. In 24 hr the mucilage decreased at find and increased till 21 hr, and decreased again. The mucilatge in the activated sludge decreased quickly, it being cultured with adding urea to liquid waste. It was found that correlation between viscosity and saccharide content in the crude mucilage was observed in all the experiments. 5. BOD adsorption of the mucilage was not markedly observed.
社団法人日本生物工学会の論文
1968-06-25