摘要
臭氧-生物活性炭工艺的处理效能随时间整体呈现下降趋势,需要定期进行活性炭的更换或再生。以生物活性炭池已运行10年左右的X、Z水厂为研究对象,分别采用了100%和50%的更换比例,并进行2.5年的连续对比运行,以探究适宜的更换比例。研究结果表明,100%更换的活性炭池具有较好的净化效果,运行前半年,对水中TOC、阿特拉津以及三卤甲烷的去除率可达40%~50%、60%~70%、70%左右,且较高的更换比例有利于延长更换后生物活性炭的使用时间,100%和50%更换比例的活性炭池在使用2.5年后碘值分别降低至600、200 mg/g左右。旧生物活性炭的存在有利于强化新活性炭的挂膜,并且增加挂膜成熟后微生物的丰度和生物多样性。实际操作中,活性炭的更换比例应以保证水厂水质安全为前提,综合考虑经济成本及长效利用确定更换比例。
The treatment efficiency of ozone-biological activated carbon process decreases with time, and activated carbon needs to be replaced or regenerated regularly. The WTP X and WTP Z, which have been running biological activated carbon filter for about 10 years, were taken as the research object, and the replacement ratio of 100% and 50% were respectively adopted, and the continuous comparison operation for 2.5 years was conducted to explore the appropriate replacement ratio. The results showed that the 100% replacement activated carbon pool had a good purification effect, the removal rate of TOC, atrazine and trihalomethane in the water at the first half a year of operation could reach 40%~50%, 60%~70% and about 70%, and the higher replacement ratio was conducive to extending the use time of biological activated carbon after replacement. The iodine value of activated carbon filters with 100% and 50% replacement ratio decreased to about 600, 200 mg/g respectively after 2.5 years of use. The presence of old biological activated carbon was conducive to strengthening the membrane hanging of new activated carbon and increasing the abundance and biodiversity of microorganisms after membrane hanging. In actual operation, the replacement ratio of activated carbon should be based on the premise of ensuring the safety of water quality in WTPs, and the replacement ratio should be determined by comprehensive consideration of economic cost and long-term utilization.
作者
张晶晶
庄星宇
胡侃
唐中亚
王慕
刘成
石鲁娜
蒋莹
ZHANG Jingjing;ZHUANG Xingyu;HU Kan;TANG Zhongya;WANG Mu;LIU Cheng;SHI Luna;JIANG Ying(Wuxi Municipal Public Environment Testing Research Institute Co.,Ltd.,Wuxi 214031,China;Wuxi Water Group Co.,Ltd.,Wuxi 214000,China;Yangzhou Water Supply and Drainage Management Office,Yangzhou 225100,China;College of Environment,Hohai University,Nanjing 210098,China)
出处
《净水技术》
CAS
2022年第12期77-85,共9页
Water Purification Technology
基金
国家水体污染控制与治理科技重大专项(2012ZX07403-001)。
关键词
臭氧-生物活性炭工艺
饮用水
更换比例
净化效能
生产性试验
ozone-biological activated carbon process
drinking water
replacement ratio
removal efficiency
productive experiment
