针对饮用水水源氨氮和砷超标的试验研究

Experimental study on ammonia nitrogen and arsenic in drinking water source

饮用水中砷含量超标、氨氮含量超标会对人体造成极大伤害,为解决我国部分地区引用水水源中砷含量超标及氨氮含量超标问题,开展小试试验,其中折点加氯法可将水中氨氮含量降低至限值(0.5mg/L)以下,反应时间为10min,次氯酸钠投加量为17~18mg/L,反应时间为30min,次氯酸钠投加量为13~15mg/L。混凝法中混凝剂为三氯化铁,投加量为3mg/L(以Fe^(3+)计),可保证产水砷含量降低至限值(0.01mg/L)以下。产水余氯采用活性炭吸附法,上升流速8m/h,接触时间7.5min,可以有效降低产水中余氯含量。最终为饮用水水源中砷含量超标及氨氮含量超标问题提供整体解决方案。

The content of arsenic in drinking water exceeds the standard, the ammonia nitrogen content exceeding the standard will cause great harm to the human body. In order to solve the problem of over-standard arsenic content and excessive ammonia nitrogen content in some parts of our country, The ammonia nitrogen content in the water is reduced below the limit （0.5mg/L）, the reaction time is 10min, the dosage of sodium hypochlorite is 17-18mg/L, the reaction time is 30min, and the dosage of sodium hypochlorite is 13-15mg/L. Coagulant coagulant ferric chloride, the dosage of 3mg/L （Fe3＋dollars）, to ensure that the water content of arsenic reduced to the limit （0.01mg/L） below. Residual chlorine production of activated carbon adsorption method, the rising flow rate of 8m/h, contact time 7.Stain, can effectively reduce the residual chlorine production. The final solution for drinking water sources of arsenic content and ammonia nitrogen content exceeding the standard to provide a total solution.