Development of sustainable sewage treatment technologies utilizing micoribal ecology and its integral modeling

本研究的目的是开发新的污水处理技术，提高能源效率，利用微生物生态学。 基于活性污泥在超负荷条件下能以较少的耗氧量去除有机污染物，以及污泥浓缩过程中微生物细胞内暂时积累的碳储存物质稳定，但在厌氧消化池中容易降解为甲烷的发现，提出了一种新的改性活性污泥。 此外，还提出了一项新的业务战略，以促进电力需求的高峰削减。 作为活性污泥微生物生态系统研究的基本方面，研究了噬菌体的释放时间，试图获得裂解宿主物种的线索，并进行了化学物质介导的微生物相互作用。

The present study aimed to develop novel sewage treatment technologies with improved energy efficiencies by utilizing microbial ecology. Based on the finding 1) activated sludge can remove organic pollutants with less oxygen consumption under overloaded condition, and 2) temporal carbon storage materials accumulated inside microbial cells are stable during sludge thickening but are readily be degraded to methane in anaerobic digester, a new modified activated sludge was proposed. In addition, a new operational strategy to contribute to peak-cut of electrical power demand was proposed. As the basic aspect on activated sludge microbial ecosystems, the release timing of bacteriophages was studied, an attempt to get a clue on the lysed host species was made, and microbial interactions mediated by chemicals was conducted.