The research on pursuing of estrogens in the coast urban area and development of its reduction technique.

保护海岸带环境是我们的责任，因此有必要了解人类活动对17β-雌二醇（E2）和雌酮（E1）等雌激素对海岸带环境的实际影响。假设河口混合河水中含有雌激素的混凝和共沉淀过程，通过城市河水和海水的混合实验研究了E2的行为。河水中的E2会通过海水的混合和扩散作用扩散到沿岸地区，由于人类每天都会排出E2和El等天然雌激素，因此污水废水中总是存在E2和El。在这项研究中，命运的E2和El作为一个结果的吸附和分解，在分批混合实验，使用城市污水和活性污泥收集从一个实际的城市污水处理厂进行了调查。污水中的E2和El从与活性污泥接触的液相中去除，吸附在污泥上的E2和El在4小时内分解。天然雌激素吸附在活性污泥上，因此易于生物降解。此外，高潜在的内分泌干扰物E2和E1的行为进行了研究，在空气流化床生物膜反应器系统的深度处理污水。该系统实现了污水深度处理的脱氮效果。而生物法对E2和E1的去除率分别低于70%和40%。虽然该系统成功地实现了深度处理，天然雌激素的去除效率低于传统的活性污泥厂。为了改善水环境，必须推进城市污水的深度处理，同时必须考虑到在此过程中雌激素的去向。

The conservation of the coastal environment is a duty for us, so that it is necessary to carry out understanding of the actual impact of estrogens such as 17β-estradiol (E2) and estrone (El) to coastal environment with human activity. On the assumption of the process for coagulation and coprecipitation in the estuary mixing river water contained estrogens, the behavior of E2 was examined by mixing experiments using urban river water and seawater. E2 in river water will diffuse into the coastal area by mixing and diffusion effects of seawater.Since natural estrogens such as E2 and El are excreted daily by humans, E2 and El are always present in sewage wastewater. In this study, the fate of E2 and El as a result of adsorption and decomposition in batch mixing experiments using municipal wastewater and activated sludge collected from an actual municipal sewage treatment plant was investigated. E2 and El in sewage were removed from the liquid phase in contact with activated sludge, and E2 and El adsorbed on the sludge were decomposed in 4 hours. Natural estrogens adsorb onto the activated sludge, and are therefore easy to biodegrade. In addition, the behavior of the highly potential endocrine disrupters E2 and El was investigated in an air-fluidized-bed biofilm reactor system for advanced sewage treatment. The removal of nitrogen as advanced sewage treatment was achieved by the system. However, the removal efficiencies of E2 and El in the biological process were less than 70% and 40%, respectively. Although the system successfully achieved advanced treatment, the removal efficiency of natural estrogens was lower than that for a conventional activated sludge plant. The advanced treatment of municipal sewage must be promoted to improve the aquatic environment, while it is necessary to take into account the fate of estrogens in the process.