実下水処理活性汚泥の生分解性プラスチック生産能力調査

抄録

Recently, PHAs (Polyhydroxyalkanoates) are focused on as biodegradable plastics. In this research, the potential capabilities of PHA production in activated sludges treating real wastewater were surveyed. In this survey, conventional, anaerobic-aerobic and A₂O activated sludges at 4 wastewater treatment plants in Tokyo were taken, and PHA production capability from acetate as carbon source in each activated sludge was investigated. Asresults, all activated sludges could accumulate PHA from acetate. This indicated that even conventional activated sludge can also accumulate PHA. The different capabilities of PHA production in activated sludges were different with dependenton the wastewater treatment plant, 20-30% PHA contents to MLSS were observed for 2 of 4 wastewater treatment plant. Throughout this survey, about 29.5% PHA contents was achieved at maximum.