Ultrafiltration membrane system has been widely used in municipal water purifica-tion plants because of its excellent effluent quality and high biosafety.Faced with the problem of land shortage when a municipal water plant is undergoing expansion and renovation,this project a-dopts a short-flow water purification process of Pipe static mixer-Inclined pipe sedimentation tank-Pressure ultrafiltration membrane.The average effluent turbidity of the product water is 0.03 NTU,with a CODMn of 0.91 mg/L,ammonia nitrogen of 0.11 mg/L.The treatment effect is sta-ble,and the water supply security is high.In addition,the intensive design of the ultrafiltration membrane workshop is effectively realized through the up-down layout scheme,optimizing the lay-out of the pipe corridor layer,rationally arranging the functional units and so on.The relative area index of the ultrafiltration membrane workshop is only 111.15 m2/(10 000 m3/d),which has sig-nificant land saving effect,and can provide a reference for the layout of pressure ultrafiltration membrane for the water plant under the condition of area limitation.
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