北方某水厂臭氧-生物活性炭处理工艺运行实践  

Operation and Practice of Ozone-Bioactivated Carbon Treatment Process in a Northern WTP

作　　者：王泽民[1] 康玲 杨舒畅 WANG Zemin;KANG Ling;YANG Shuchang(Tangshan Caofeidian Water Supply Co.,Ltd.,Tangshan 063200,China)

机构地区：[1]唐山市曹妃甸供水有限责任公司,河北唐山063200

出　　处：《净水技术》2024年第12期213-220,共8页Water Purification Technology

摘　　要：臭氧生物活性炭作为一种新型的水处理工艺,结合了臭氧氧化和生物活性炭吸附的优点。文章主要研究臭氧生物活性炭技术适用于水厂实际运行的处理效果和优化方案。通过检测高锰酸盐指数、氨(以氮计)、溶解氧等水质指标,定期送检活性炭,收集臭氧投加量、水中余臭氧浓度及特殊时期相关工艺参数和生物活性炭滤池反冲洗数据,定期分析臭氧-生物活性炭处理工艺运行情况。结果发现,可以通过“以连续水质指标检测为主,阶段性活性炭镜检和生物检测结果为辅”的方法判断生物挂膜过程,生物活性炭滤池从开始运行至挂膜成熟历经约11个月,挂膜成熟后去除率随季节稳定变化,高锰酸盐指数去除率为30%~40%,氨(以氮计)去除率为45%~55%。根据实际反冲洗情况,调整反冲洗周期和气冲频率优化反冲洗方案,确定了适用于水厂的反冲洗方案:气冲强度为30 m^(3)/(h·m^(2)),夏季周期为7 d,初滤水为45 min;秋冬春季周期为14 d,初滤水为45 min;通过提高臭氧投加量,降低次氯酸钠投加量。文章研究结果和方法对行业内同工艺水厂研究具有借鉴价值和指导意义,未来将继续研究并量化提高臭氧投加量与降低出厂水三卤甲烷等消毒副产物之间的关系,以及如何采用生物活性炭滤池出水溶解氧做水中余臭氧浓度标准的参考指标,以水中余臭氧质量浓度0.01 mg/L为运行标准。As a new type of water treatment process,ozone bio-activated carbon combines the advantages of ozone oxidation and bio-activated carbon adsorption.This paper mainly studies the treatment effect and optimization scheme of ozone bio-activated carbon technology applied to the actual operation of water treatment plant(WTP).The operation of the ozone-bio-activated carbon treatment process is subject to regular analysis,with testing of water quality indicators such as the permanganate index,ammonia(in terms of nitrogen)and dissolved oxygen.Furthermore,activated carbon is sent for inspection on a regular basis,and data is collected on the dosage of ozone,the residual concentration of ozone in water,and relevant process parameters and bio-activated carbon filter backwash data at specific times.It is determined that the biofilm process could be evaluated using a continuous water quality index test,complemented by stage-specific activated carbon mirror tests and biological test results.The bioactivated carbon filter reached maturity within approximately 11 months of operation.The removal rate following the maturation of the biofilm exhibited a consistent seasonal trend,with the permanganate index removal rate range from 30%to 40%,the ammonia(in the form of ammonia)removal rates range from 45%to 50%.In consideration of the actual backwash situation,it is determined that the backwash cycle and air flushing frequency should be adjusted in order to optimise the backwash program.This would allow for the determination of the most appropriate backwash program for the WTP,with an air flushing intensity of 30 m^(3)/(h·m^(2)).The summer cycle of 7 days comprises an initial filtration of water for 45 minutes;the autumn,winter and spring cycle of 14 days also comprises an initial filtration of water for 45 minutes.By increasing the amount of ozone dosage,the amount of sodium hypochlorite was reduced.The results of the study of the industry with the same process water plant research have a reference value and guiding significance.In t

关 键 词：臭氧生物活性炭 生物膜 反冲洗 臭氧投加量 水中余臭氧 溶解氧 

分 类 号：TU991[建筑科学—市政工程]