Combined biological trickling filter of denitrification and dephosphorization

Abstract

The invention relates to a composite biological trickling filter for denitrification and dephosphorization, belonging to the technical field of sewage treatment. The biological trickling filter is cylinder-shaped and comprises a water distributing area, a stuffing layer and a water catch area from top to down; wherein, the water distributing area comprises a plurality of rollers, a rotary water distributor, a water inlet pipe, a water pipe, a water sprayer and tracks; the water inlet pipe is connected with the rotary water distributor, the rotary water distributor is connected with the water pipe which is provided with a water outlet, the water sprayer is positioned below the water pipe and is connected with the rollers; five layers of grid frames are arranged vertically in the stuffing layer, and the grid frames separate the stuffing layer into a grid structure, so that the stuffing layer is successively separated from bottom to top into a stone and sand layer, a composite steel slag stuffing layer, a plaster stuffing layer, a sawdust stuffing layer and a coke layer; the water catch area comprises a header tank, a water outlet pipe and a water catch plate, wherein, the header tank is positioned at the bottom of the trickling filer, and the water outlet pipe is connected with the header tank. By introducing the grid frames, the composite biological trickling filter has the advantages of eliminating the problems of the filter blockage, water accumulation and other defects, effectively improving the aerobic bacteria processing performance of the composite biological trickling filter, efficiently removing COD and simultaneously achieving the effects of denitrification and dephosphorization.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a compound biological trickling filter for nitrogen and phosphorus removal. Background technique [0002] At present, the sewage treatment rate in cities and towns in my country is very low, and most domestic and production wastewater are directly discharged into rivers without treatment, resulting in serious water pollution. The advanced urban sewage treatment technology shows that although the pollutant removal rate is high, it has the disadvantages of large area, high basic investment and high operating costs, which makes it difficult for many sewage treatment plants to raise funds to build or maintain operation due to high costs. [0003] Biological filter is developed in the field of sewage treatment as an aerobic treatment technology for organic sewage. In the process of passing through the surface of the filter material, the pollutants are decomposed t...

AI Technical Summary

Problems solved by technology

However, at present, the traditional biological trickling filter cannot effectively remove phosphorus. At the same time, due to the extremely uneven transportation of sewage in villages and towns, there has been a long period of water cut-off, and the sludge is anaerobic, resulting in odor.

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