处理低温低浊水的混凝剂及助凝剂的对比应用研究

在我国北方进入冬季,松花江水处于长达4~5个月的低温低浊期,温度一般维持在3~6℃,浊度一般在6~13NTU之间.本文利用聚合氯化铝(PAC)、聚合氯化铝铁(PAFC),通过经验数据法和正交试验等方法确定最佳投药量,使剩余浊度基本上降到0.5NTU一下,并且进一步考察水中其他因素,如氨氮、硬度、COD、电导率和p H的去除情况,其中COD随着混凝剂的投加有明显的去除效果,剩余含量达到0.8 mg/L左右,而氨氮在0.5 mg/L上下浮动.电导率随着改性活化硅酸的投入逐渐升高.经改良后的活化硅酸有很好的稳定性,对浊度的去除效果也很好.

Application for Contrast of Low Temperature and Low Turbidity Water Coagulant Treatment

In northern China into the winter, the Songhua River water is up to 4 to 5 months of low temperature and turbidity,temperature is generally maintained at 3 - 6 ℃ ,turbidity is generally between 6 - 13NTU. In this paper, the remaining turbidity basically dropped 0.5NTU by empirical data and orthogonal test methods such as optimum dosage using aluminum chloride （ PAC）, ferric chloride （PAFC）. And other factors in water such as ammonia, hardness, COD and conductivit removal are investigated. COD has significant removal effect with the increase of the coagulant, the remaining content of 0. 8mg/L, while the ammonia in 0. 5 mg/L Ammonia at 0.5 mg/L plus or minus. Conductivity is gradually increased with the modified silicate activated input. Activated silicic acid has good stability after improvement, the turbidity removal efficiency is also very good.