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             ̎ˮ̎ˇһ֞ 3 Nͣ

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                  Water treatment process

             According to the processing method, sewage treatment process is generally divided into 3 types:

             one:Physical treatment:

             Membrane filtration method, suitable for big change of water quality situation.The characteristics of using this process is: the device is compact, easy to operate, and the influence of load change little.Membrane filtration method is under the action of external force, the solution is separated with a certain velocity along membrane surface flow, solvent and low molecular weight substances,inorganic ions in the solution from the high voltage side through the membrane into the low pressure side, and as the filtrate and the discharge; while the solution polymer material, colloidal particles and microorganisms by ultrafiltration the solution was concentrated, and in the from of a concentrate discharge.

               two: Physical Chemistry method:

            Applicable to the sewage water quality changes in the larger situation. Methods generally used are:sand filtration, activated carbon adsorption, flotation, coagulation precipitation. The characteristics of this process is: using hollow fiber ultrafiltration device for processing, advanced technology,compact structure, less land occupation, system of intermittent operation, simple management.

              there: biological treatment method

           Applicable for high organic content of sewage. The general use of activated sludge process,contact oxidation (as sh, own), rotating biological contactor and other biological treatment method.Or is used alone, or a combination of several methods such as the use of biological treatment,contact oxidation and biological aerated filter; biological aerated filter + activated carbon adsorption; turntable ten sand filtration process. This process has to adapt to changes in hydraulicload ability strong, produce less amount of sludge, the advantages of easy maintenancemanagement.    

            

           

           
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