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How to test the purity of the filter? FIRST!1.Wang Dong 2.Ma Jinghui 3.Zhang Hongli 4.(1. Beijing Waterlink Environmental Engineering Co., Ltd,BEIJING 100028;2. national industrial water treatment Engineering Technology Research Center,Tianjin 300131;3. School of Environment, Renmin University of China,Beijing 100872;4. Nordic Water, Sweden,[Abstract] the pilot-scale experiments on the deep treatment of two sedimentation tank effluent from municipal sewage treatment plant were carried out by means of silt and active sand filter,It is feasible to use it in municipal water reuse,The water quality is stable,The indicators are better than the requirements of the draft for comment on 2002 of the 'urban Miscellaneous water quality standard.The selection of the flocculation and the filtration effect of the filter are briefly analyzed.[Key words] filter;Continuous filtering;DynaSand active sand filter is an advanced one invented by Sweden Waterlink AB,Conti

How often does multi-media filter material change? Liaojing manufactures multi-media filter (filter bed ),Both two or more media are used as the media filter of the filter layer,In the industrial circulating water treatment system,It is used to remove impurities and absorb oil from sewage,Make the water quality meet the requirements of recycling.The role of filtering,It is mainly to remove suspended or colloidal impurities in water,In particular, it can effectively remove small particles and bacteria that cannot be removed by precipitation technology,BODs and COD also have a certain degree of removal effect.A multi-media filter uses one or more filter media,At a certain pressure, water with high turbidity is passed through granular or non-granular materials of a certain thickness,So that the process of effectively removing suspended impurities to clarify water,The commonly used filter material has quartz sand,Anthracite,Manganese sand, etc.In the industrial circulating water treatment system,It is used to rem