Food processing wastewater treatment commonly used chemical method (flotation, sedimentation, adsorption, etc.), but its removal efficiency instability, high operating costs, manage to maneuver. In recent years, mainly aerobic treatment technology, the removal of organic matter, although better, but its higher operating costs. Upflow anaerobic sludge blanket (UASB) and almost no power consumption, trickling biofilter (TF) is a combination of UASB-TF technology, after a number of manufacturers of a variety of food production and wastewater treatment applications show that the process efficiency, low operating costs, less investment, operation and management is very simple, the second start is very convenient, the water can reach the "integrated Wastewater Discharge Standard (GB 8978-1996) of a standard, and there are some manufacturers their water back on the production of non-direct cooling system.