一、当前所遇到的问题水是人们日常生活和生产中不可缺少的物质之一,饮用水水质的好坏直接关系到人们的生活和健康。近年国内外饮用水水源普遍受到氨氮和其他有机物的污染。因此一些国家历史上长期沿用的“普通加氯”消毒工艺已经不能满足要求。于是便开始发展“折点加氯”净水工艺。这种加氯技术对减轻饮用水氨氮污染、提高消毒效应有好处。但它会使水中氯 I. Current problems Water is one of the indispensable substances in people’s daily life and production. The quality of drinking water is directly related to people’s lives and health. In recent years, drinking water sources at home and abroad have generally been contaminated by ammonia nitrogen and other organic substances. Therefore, the “general chlorination” disinfection technology that has been used for a long time in some countries has not been able to meet the requirements. So they began to develop “point-point chlorination” water purification process. This chlorination technology is beneficial to reducing ammonia nitrogen pollution in drinking water and improving the disinfection effect. But it will make chlorine in the water