Recycling water by sedimentation and filter it is easy and economical method. 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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