微污染原水的生物接触氧化预处理技术研究

水资源被广泛污染，微污染原水在水厂加氯消毒过程中易形成三卤甲烷类可疑致癌物，自来水水质威胁着饮用安全．传统净水工艺必须变革，以适应处理微污染原水的需要．合理设计的生物接触氧化池，能经济有效地显著降低微污染原水中的氨氮、亚硝酸氮、ＣＯＤ、ＴＯＣ、浑浊度、铁、锰和酚等含量．Ａｍｅｓ致突变试验呈阳性的微污染原水，经过生物接触氧化预处理和合理的后续深度处理，能净化处理成Ａｍｅｓ试验呈阴性的安全卫生饮用水，对促进给水事业发展和缓解水资源矛盾，具有普遍和重大的现实意义．

Study on Using Bio-contact Oxidation Pretreatment Technique to Purify Light-polluted Raw Water

Water resource is being polluted extensively. While the light-polluted raw water is being disinfected by chlorination in waterworks, THMs(Trihalomathanes), the doubtful cancerogenic substances, will be easily produced in water,which impairs the safety of drinking water. The traditional water purification processes must be required to meet the treatment requirements of light-polluted raw water. The bio-contact oxidation tank, which is designed rcasonably, can remove many kinds of pollutants in light-polluted raw water economically and effectively, such as NH3-N, NO2--N, COD, TOC, turbidity, iron, mangancce and phenol, et al. Through the bio-contact oxidation pretreatment and some reasonable following treatment processes, the light-polluted raw water, which is positive in Ames assey, can be turned into nogative water. The latter is safe and hygienic for drinking. This steady is commonly and greatly of practical significance for the development of water supply engineering and the mitigation of the contradiction of water resource.