摘要
当水源地藻类或水草大量生长时,原水出现pH过高、溶解氧饱和、总碱度降低的变化,此时仍采用聚合氯化铝(PAC)处理,出厂水存在铝和pH超标风险。试验研究得出,当硫酸铝投加量为55 mg/L或组合投加45 mg/L硫酸铝+10 mg/L PAC,以及调节原水pH值至8.5后投加20 mg/L PAC时,可使出水中铝和pH均符合国标要求。
High pH,saturated dissolved oxygen and decrease of total alkalinity of the raw water appeared when a large number of algae or aquatic plants growing in the water source area,aluminum and pH of the treated water would exceed the standard if still using the polyaluminum chloride(PAC).Experimental results showed under the dosage of 55 mg/L aluminum sulfate or the combination dosage 45 mg/L aluminum sulfate+10 mg/L PAC,as well as dosing 20 mg/L PAC after adjusting the pH value of raw water to 8.5,the aluminum and pH of the treated water could both meet the national standard.
作者
赵云
张珲
丁强
刘晓玲
Zhao Yun;Zhang Hui;Ding Qiang;Liu Xiaoling(Xuzhou Capital Water Co.Ltd.,Xuzhou 221000,China)
出处
《供水技术》
2021年第1期13-16,共4页
Water Technology
关键词
高pH
残余铝
硫酸铝
聚合氯化铝
high pH
residual aluminum
aluminum sulfate
polyaluminum chloride
