折点加氯法去除氨氮应用于河道突发性污染中的试验研究及其应用

Experimental study and application of breakpoint chlorination method in removal of ammonia-nitrogen used in sudden river pollution

河道日常管理中,时有突发性污染事件发生,氨氮超标污染最为常见,而且运用生物法处理,在短时间内得不到明显的去除效果。本实验采用折点加氯法去除氨氮废水,通过控制次氯酸钠的投加量,改变氨氮与有效氯的比例,利用次氯酸钠的强氧化性,最终将水中的氨氮完全转化为氮气而去除。本文分析废水中氨氮浓度与投加次氯酸钠的定量关系,确定次氯酸钠的最佳投加量,并在实际运用中验证了其准确性与可行性。

In the daily management of river,sudden pollution occurs from time to time,and ammonia-nitrogen pollution is the most common one.Biological treatment cannot achieve obvious removal effect in a short time.By controlling the dosage of sodium hypochlorite to change the ratio of ammonia-nitrogen and active chlorine,ammonia-nitrogen in water can be completely converted into nitrogen and removed owing to the strong oxidizability of sodium hypochlorite.This paper analyzed the quantitative relationship between the concentration of ammonia-nitrogen in liquid waste and the dosage of sodium hypochlorite,determined the optimal dosage of sodium hypochlorite,and verified its accuracy and feasibility in practical applications.