In the process, the removal of turbidity water. If you want to process, filter efficiency and cost-effectiveness need to be studied to find the appropriate filtering rate. Therefore, this research aims to find out the appropriate filtering rate for waste water sewage treatment factory, through FishNet. By the sand filter tank model is smaller than the actual tank 1: 300 and a sand filter and gravel layer depth as far as the actual size is 0.7 m and 0.3 meters, respectively, and to do the experiment, water flow rate that varies in order to choose the appropriate flow rate. Measure the turbidity value, the quantity of acid-alkaline (pH) and the introduction of electricity (EC)
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