In recycling water in different ways according to the characteristics of the water to produce water recycling. The process settling and filter, it is one of the methods of recycling and saving water is easy to control. Therefore, this research aims to find out the appropriate filtering rate for waste water treatment has been passed from Khon Kaen branch FishNet Chiang Yuen, to reduce power consumption, and helps them with quality water, as needed. 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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