High efficiency fluidization upward flow multilayer composite filter material biological filter tank coupled with ozonation and water treatment method thereof

Abstract

The invention provides a high efficiency fluidization upward flow multilayer composite filter material biological filter tank coupled with ozonation and a water treatment method thereof, relating to a biological filter tank and a water treatment method using the biological filter tank. The biological filter tank is composed of an upper filter material, a medium filter material, a lower filter material and a supporting layer, wherein the upper filter material is active carbon, anthracite or biological ceramsite, the medium filter material is modified zeolite, natural zeolite or synthetic zeolite and the lower filter material is a phosphorus functional material. The filter tank is characterized by fast start, a complex and stable biological phase, great biomass, high activity, strong impact resistance, a filter material expansion rate of 0% to 50%, small resistance at the head of the filter tank, high mass transfer efficiency of materials, oxygen and pollutants, a high utilization rate of filter layers and filter materials and small possibility of occurrence of hardening of the filtering materials. The filter tank is applicable to treatment of raw water in which the concentration of water source phosphorus, ammonia nitrogen and organic pollutants fluctuates and can stably operate at a low temperature.

Description

technical field [0001] The invention relates to a biological filter and a water treatment method using the biological filter. Background technique [0002] Eutrophication of surface water in my country is widespread, and ammonia nitrogen has become an important pollutant in water sources. Therefore, removing ammonia nitrogen in water has become an urgent problem for water supply plants. The traditional coagulation, sedimentation and filtration processes have a low removal rate of ammonia nitrogen, and it is difficult for the treated effluent to meet the relevant national water quality standards for drinking water quality. [0003] Biological filter technology is a commonly used drinking water treatment technology in recent years, mainly used to remove organic pollutants in water. In recent years, the eutrophication of surface water in my country has generally existed, and the concentration of ammonia nitrogen in surface water is relatively high, so biological filters are al...

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Problems solved by technology

[0006] Traditional biofilter, after entering the low temperature period, especially when the water temperature is lower than 12 degrees Celsius, the biological activity is significantly reduced, and the degradation ability of ammonia nitrogen and organic matter in water is significantly reduced, and it is impossible to degrade and remove organic matter, ammonia nitrogen and other pollutants in water, let alone Dealing with sudden increases in pollutant concentrat

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