Immersion type ultra-filtration system
An ultrafiltration system and immersion technology, applied in the field of water treatment, can solve the problems of increasing project land occupation, construction cost, operation and maintenance costs, etc., and achieve the effect of saving project area, strong pollution holding capacity, and improving recovery rate.
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[0026] Example 1
[0027] A water plant with a treatment scale of 400,000m 3 / d, the raw water uses surface water, of which COD Mn It is 4mg / L and turbidity is 20NTU. The specific treatment process is as follows: the prepared coagulant is added 15cm upstream of the suction port of the self-priming ultrafiltration water inlet pump, and then enters the submerged ultrafiltration membrane pool. The coagulant is polyaluminum chloride. 2mg / L (calculated as aluminum). The ultrafiltration membrane is PVDF submerged ultrafiltration, the membrane pore size is 0.01 microns, and the membrane area is 20m 2 , The flux of ultrafiltration membrane is 2.0m / d.
[0028] The operation mode of the ultrafiltration membrane is backwashing and air scrubbing after every 30 minutes of filtration. The backwashing water volume is 2.2m / d, the washing time is 1min, and the backwashing water enters the backwash recovery through the backwash drain on the submerged membrane tank. In the adjustment tank, the ba...
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