摘要
江苏某地表水厂以微山湖水为水源,投产以来,水源地因受季节性变化、南水北调影响而引起制水过程中铝超标,因此通过试验考察了水中残余铝的影响因素。结果表明:聚合氯化铝(PAC)投加量、pH值、水温、沉后水浊度是影响制水过程中残余铝的主要因素。生产运行中发现,夏季泄洪期间,原水pH值降至7.4~8.0时,PAC投加量控制在6~7 mg/L,滤后水残余铝含量稳定在0.12~0.18 mg/L,相比平日,PAC投加量减少约20%;控制沉后水浊度可以降低滤后水中残余铝超标的风险,但不能确保残余铝含量达标。
Weishanhu Lake was used as water source for a waterworks in Jiangsu. Since the initiation of production,residual aluminum had been exceeded the standard in the process of water production,which was caused by seasonal variation of the source water quality and the South-to-North Water Diversion Project,so the factors that influenced residual aluminum were investigated. The results showed that PAC dosage,pH,water temperature,and settling water turbidity were the main factors for residual aluminum. In the production operation,it was found that when the pH of the source water dropped to 7. 4-8. 0 during the summer flooding season and PAC dosage was controlled between 6-7 mg/L,the residual aluminum was stabilized between 0. 12-0. 18 mg/L in the filtered water,and the PAC dosage was reduced by 20% approximately. Controlling the settling water turbidity could reduce the risks of residual aluminum exceeding standard,but could not guarantee the compliance with standards.
作者
贺晓娟
袁本松
王砚
黄保平
王文静
仲丽娟
肖刚
HE Xiao-juan;YUAN Ben-song;WANG Yan;HUANG Bao-ping;WANG Wen-jing;ZHONG Li-juan;XIAO Gang(Chengdu Xingrong Environment Co.Ltd.,Chengdu 610041,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第3期45-48,共4页
China Water & Wastewater
关键词
微山湖水质
残余铝
PAC投加量
pH值
水温
沉后水浊度
water quality of Weishanhu Lake
residual aluminum
PAC dosage
pH
water temperature
settling water turbidity
