Abstract
The study was dealt with the effects of substrate composition in synthetic wastewater to growth of filamentous organisms. This paper described on the following items. 1) The synthetic substrate was observed on the degeneration. As the result, some of fatty acids were apparently formed in the synthetic wastewater. 2) The experiment was practiced by the specified apparatus (rotary cylinder type), using about 10 kinds of the wastewaters. As the result, the water soluble fatty acid would be caused unusual growth of filamentous organisms. 3) Compared filamentous organisms with flocculating bacteria in biodegradability for the substrate in No.1 water, it was higher in filamentous organisms than in flocculating one; the biodegradation was made rapid progress in about 72 hours at 20℃. 4) Two fatty acids (non- and water soluble) were served as substrates. The results were as follows. (1) Myristic acid had no unusual growth of filamentous organisms. (2) Propionic acid caused biological bulking in activated sludge in about 10 days.
