高级氧化组合工艺协同净化微污染水的示范生产实验

摘要

为考察催化氧化－UV／H2O2－生物活性炭（BAC）高级氧化组合联用工艺在实际生产中对微污染水源水的的处理效能，在淮南某水厂示范工程对微污染淮河水进行了生产实验．结果表明，催化臭氧氧化－BAC组合联用工艺对水中的UV254、DOC、氨氮、CODMn及THMFP均有较好的去除效果，且不会带来溴酸盐的问题．催化臭氧氧化工艺对UV254、DOC、CODMn的平均去除率分别为21．8％、8．1％、10．8％．BAC对氨氮有很好的去除效果，最高去除率可达61％；对DOC和CODMn的平均去除率分别为10．4％和15．3％．催化臭氧氧化接触池对THMFP的平均去除率为34．9％，最高去除率可达53．2％．UV／H2 O2在示范性生产实验中，对进一步提高有机物的去除能力有限；在实际生产设计中，考虑UV分解剩余臭氧的效用建议采用：催化臭氧氧化－UV－BAC－砂滤是确保饮用水出水安全可靠的高级氧化工艺必要的组合工艺模式．研究结果可为各自来水厂处理低温低浊水、提高出厂水水质以及自来水厂整体工艺的提升改造提供借鉴和参考．%The aim of this work is to investigate the practical effect of the combined advanced oxidation processes ( catalytic ozonation⁃UV/ H2 O2⁃biological activated carbon ( BAC) ) on improving the water quality of micro⁃polluted raw water from Huaihe river. The results suggest that catalytic ozonation combined with BAC process could improve the water quality by enhancing the removal efficiency of UV254 , DOC, ammonia nitrogen, CODMn and trihalomethanes formation potential (THMsFP), while it did not bring any bromate risk because of low bromate formation after catalytic ozonation. The average removal rates of UV254 , DOC and CODMn by catalytic ozonation were 21.8%, 8.1%and 10.8%, respectively. And the BAC filter could efficiently remove the ammonia nitrogen in water with a highest removal rate of 61%. The average reduction percentages of DOC and CODMn by BAC process were 10.4% and 15.3%, respectively. Furthermore, the catalytic ozonation process could significantly decrease THMsFP,with an average removal rate of 34.9%, and the maximum rate could arrive to a percentage of 53.2%during the test. However, UV/H2O2 process in this project could not furthered improve the water quality of the Huaihe river with seasonal characteristics of low temperature and low turbidity. Therefore, the combination of catalytic ozonation⁃UV/H2 O2 is of little significance, but catalytic ozonation⁃BAC⁃sand filter process is a necessary combination mode of advanced oxidation process to ensure the safety and reliability of drinking water in the practical production design. Considering the decomposition role of UV for residual ozone, catalytic ozonation⁃UV⁃BAC⁃sand filter process are the recommended processes as AOPs for micro⁃polluted river water. The results from the demonstration project can provide a reference for improving the quality of effluent water with low temperature and turbidity and reconstruction for the drinking water treatment plant.