尾水氨氮强化混凝试验研究

Experimental study on enhanced coagulation about ammonia of the tail water

水体富营养化已成为水环境质量治理的难点和重点,而污水中的氨氮过高是引起水体富营养化的重要因素。为了探索氨氮的去除效果,文章以济南某污水处理厂为例,通过投加混凝剂聚合氯化铝(PAC)和不同的助凝剂如沸石粉、粉末活性炭以及氨氮去除剂及不同工艺组合进行对比的方法,对其尾水进行强化混凝试验研究。结果表明:三种氨氮去除剂中,"水之蓝"的氨氮去除效果最优,去除率达到9.41%;各种组合工艺中,"沸石粉+粉末活性炭+氨氮去除剂"复配组合效果最佳,去除率达到14.19%;综合评价,氮的去除效率虽然有所上升,但是上升的幅度不大。

Water eutrophication has become a difficulty and focus of the water environment quality management. High ammonia content in the wastewater is an important factor that causes eutrophication. In order to explore the ammonia nitrogen removal effect, by taking a sewage treatment plant in Jinan as an example, enhanced coagulation experiment was researched on tailrace of the station, by adding coagulant poly aluminum chloride （PAC） and different coagulant aids such as zeolite powder, powdered activated carbon and ammonia remover, and by the different process combinations. The test results show： （i） the ammonia removal efficiency of ＂water Blue＂ is best in the three ammonia removers, and the removal rate can reach up to 9. 41%; （2） in various combinations of process, the combination of zeolite powder, powdered activated carbon and ammonia remover has the best removal effect, and the removal rate can reach up to 14.19% ; （ 3 ） ammonia removal efficiency increases, but the rise in the magnitude is not large.