Abstract:

Abstract:This paper introduced the characteristics of ultrafiltration technology,compared the membrane component parameters,construction cost and operating cost of pressure type ultrafiltration system and immersion ultrafiltration system combining a certain water purification plant in Luohe,and confirmed that the pressure type ultrafiltration system could maintain higher membrane flux operation for a long time,which carries more technical and economic advantages than the immersion ultrafiltration system.At the end of this paper,the authors pointed out that the ferric salt coagulants are preferred and the residual volumes of discharged coagulants and coagulant aids from precipitation tank should be strictly controlled in the water purification plant,which adopts the new type shortened flow process of “coagulative precipitation + ultrafiltration”.

Key words: Keywords:water purification plant, tap water, ultrafiltration membrane, pressure type ultrafiltration system, immersion ultrafiltration system