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以地表原水为研究对象,进行了生物活性炭(BAC)作为纳滤工艺的预处理单元制备饮用水的中试,考察了BAC对造成纳滤膜污染的有机污染物的去除情况。结果表明,BAC对DOC、COD和UV254的去除率分别为29.0%、19.7%和37.0%。BAC滤柱的出水浊度略高于进水浊度,主要是出水携带破碎炭末及微生物所致,BAC出水中的颗粒物可被保安过滤器截留,BAC后设置足够的砂垫层或单独的滤池、超滤等单元可有效保障纳滤系统的安全。在2个月的连续运行期间,纳滤操作压力变化为0.32～0.37 MPa,膜污染程度很低,BAC作为纳滤预处理工艺是适合的。
Taking raw water from the surface as the research object, bioactivated carbon (BAC) was used as a pilot plant for the preparation of drinking water in the nanofiltration process. The removal of organic pollutants by BAC on the nanofiltration membrane was investigated. The results showed that the removal rates of DOC, COD and UV254 by BAC were 29.0%, 19.7% and 37.0% respectively. BAC filter column effluent turbidity slightly higher than the water turbidity, mainly caused by the effluent carrying broken carbon and microorganisms, BAC effluent particles can be intercepted by the security filter, after the BAC enough sand cushion or separate Filter, ultrafiltration and other units can effectively protect the safety of nanofiltration system. During two months of continuous operation, the nanofiltration operating pressure varied from 0.32 to 0.37 MPa, and the degree of membrane fouling was very low. BAC was suitable as a nanofiltration pretreatment process.