Novel biological aerated filter capable of solving backwashing problem

Abstract

The invention belongs to the field of application of environmental protection technologies, and in particular relates to a novel biological aerated filter which is integrated with a settling tank and changes a filter operation mode by controlling suspension fillers and liquid levels so as to solve the problem of backwashing of a biological filter. In order to overcome the defects of frequent blocking and difficult overhauling of the biological aerated filter, the suspension fillers of which the density is slightly lower than that of water are used as filter media to design the internal structure of the filter, automatic equipment is used for controlling the variation of the liquid levels to ensure than a reactor is changed from the filter to a fluidized bed, and the fillers are changed from static fillers to flowing fillers which overturn along airflow and water flow, so that sludge among filler slits automatically falls; therefore, the novel biological aerated filter is provided in combination with an automatic control principle and a reactor structure optimization principle, so that the problems of difficulty in backwashing and overhauling of the filler are solved. Simultaneously, the aims of continuously injecting water, saving primary settling tanks, integrating two settling tanks and improving sewage treatment efficiency are fulfilled.

Description

technical field [0001] The invention belongs to the application field of environmental protection technology, and specifically relates to a novel biological aerated filter which uses suspended fillers and liquid level control to change the operating mode of the filter to solve the backwashing problem of the biological aerated filter and integrates a sedimentation tank. Background technique [0002] As a kind of biofilm treatment method, biological aerated filter integrates the strong oxidative degradation ability of biofilm and the interception efficiency of filter layer. It is a sewage regeneration process suitable for large-scale reuse, high efficiency and low consumption. The biological treatment method of sewage is to use the metabolism of microorganisms to degrade the pollutants in sewage. The whole treatment process includes the flocculation of microorganisms, the adsorption of pollutants by microorganisms, the oxidative decomposition of microorganisms and the precipita...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of frequent blockage and difficult maintenance of the biological aerated filter, the present invention adopts the suspended filler as the filter material, and designs a new type of biological aerated filter combined with the principle of automatic control and the principle of reactor structure optimization, so as to solve the problem of backwashing and Difficult to troubleshoot issues

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