Efficient circulating denitrification biological filter bed system

Abstract

The invention relates to an efficient circulating denitrification biological filter bed system which comprises a treatment box, a material supporting plate is arranged in the treatment box, a biofilm formation filter material is arranged on the material supporting plate, a water inlet pipe is connected to the side wall of the treatment box and located below the material supporting plate, and a water outlet pipe is arranged on the side wall of the treatment box and located above the biofilm formation filter material. The treatment box is provided with a water circulation mechanism, the water circulation mechanism is used for enabling water above the biofilm formation filter material to flow back to the position below the material supporting plate for circulating filtration, and the water inlet pipe and the water outlet pipe are each provided with a valve. Through the arrangement of the water circulation mechanism, sewage can pass through the biofilm formation filter material for multiple times, is subjected to circulating purification treatment and then is discharged out of the treatment box through the water outlet pipe, so that the effluent quality reaches the standard, and the purification effect on nitrogen in the sewage is improved.

Description

technical field [0001] The application relates to the field of sewage treatment, in particular to a high-efficiency circulating denitrification biological filter bed system. Background technique [0002] Since the reform and opening up, due to the rapid development of the national economy, environmental governance has not kept pace with the development of industrial and agricultural production, resulting in serious damage to the water environment, which has attracted the attention of the country and the people. Nitrogen pollution is an important cause of water eutrophication. Biological denitrification technology is currently an effective method for treating nitrogen in sewage, mainly including biofilm method and activated sludge method. Biofilm method is a denitrification biological filter bed, which refers to the The process of converting nitrate and nitrite in target wastewater into nitrogen gas under anaerobic or anoxic conditions. [0003] Related technologies, such as...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that there are the following defects: due to the limited packing of the filter bed, if the sewage flow rate is large and the passing rate is too fast, it is easy to cause incomplete denitrification process, and the nitrification nitrogen in the effluent water quality is not up to the standard. needs further improvement

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