SRT制御による下水中内分泌かく乱物質の除去

概要

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Recently, the effects of endocrine disrupters on human health and ecosystem have been of great concern. In this research, we investigated the fate of endocrine disrupters in the wastewater treatment process. Moreover, we studied how to reduce levels of endocrine disrupters by controlling SRT (solids retention time) which is one of the important factors in the wastewater treatment process. Finally, it was clarified that 17β-estradiol (E2) is decomposed by activated sludge, and nonylphenol is adsorbed and removed by activated sludge. Moreover, in the case of a longer SRT process, E2 is decomposed in the earlier stage of the process, and it is estimated that about 10 days or 12.5 days is required for microorganisms that decompose E2 or E1 to grow. In the case of a shorter SRT, E2 and estorone (E1) levels tended to increase in aerobic tanks. One of the reasons is that removal rates of the E2 conjugate, E2 and E1 were different in each SRT, that is, the E2 conjugate was decomposed more rapidly than E2 and E1 so E2 and E1 were increased.
社団法人　日本水環境学会の論文
2004-01-10