摘要
利用混凝剂、次氯酸钠(NaClO)对高氨氮、高浑浊度河道水进行小试试验,结果表明:PAC投加量为200 mg/L、PAM投加量为15 mg/L可作为常规混凝最佳药剂投加量,浑浊度去除率可达99.0%,COD_(Cr)去除率达65.9%。通过4因素3水平的正交试验设计,表明影响试验结果的因素依次为pH>搅拌速率>温度>搅拌时间,最优组合为pH值=7、搅拌速率为300 r/min、搅拌时间为10 min、水温为30℃。当NaClO投加量为530 mg/L、PAC投加量为200 mg/L、PAM投加量为15 mg/L时,在最优试验条件下预氧化-混凝处理水样后较常规混凝沉淀处理水样时氨氮去除效率提升77.1%,TP去除效率提升12.7%,采用0.10 g/L的活性炭处理1 h可去除95.0%的余氯。
Coagulant and sodium hypochlorite(NaClO)were used to carry out a small-scale test on the river water with high ammonia nitrogen and high turbidity.Results showed that PAC dosage of 200 mg/L and PAM dosage of 15 mg/L could be used as the best dosage of conventional coagulation agents,the turbidity removal rate could reach 99.0%,and the COD_(Cr) removal rate could reach 65.9%.The orthogonal test design of four factors and three levels showed that the factors affecting the test results were pH>stirring rate>temperature>stirring time.The optimal combination was pH value=7,stirring rate was 300 r/min,stirring time was 10 min,water temperature was 30℃.When NaClO dosage was 530 mg/L,PAC dosage was 200 mg/L,and PAM dosage was 15 mg/L,pre-oxidation-coagulation under optimal test conditions compared with the conventional coagulation sedimentation treatment of water samples,the removal efficiency of ammonia nitrogen was increased by 77.1%,and the removal efficiency of TP was increased by 12.7%,treatment with 0.10 g/L activated carbon for 1 h could remove 95.0%of residual chlorine.
作者
伍彬
李一平
王海英
蒋海砖
唐春燕
周玉璇
WU Bin;LI Yiping;WANG Haiying;JIANG Haizhuan;TANG Chunyan;ZHOU Yuxuan(College of Environment,Hohai University,Nanjing 210098,China;Nanning Survey and Design Institute Group,Nanning 530000,China)
出处
《净水技术》
CAS
2022年第S01期28-33,共6页
Water Purification Technology
基金
水体污染控制与治理科技重大专项(2017ZX07204003)
江苏省研究生科研与实践创新计划(422003123)
国家自然科学基金重点项目(52039003)。
关键词
混凝沉淀
次氯酸钠
正交试验
高浑浊度
高氨氮
coagulation sedimentation
sodium hypochlorite(NaClO)
orthogonal test
high turbidity
high ammonia nitrogen
