Biological rotating disc

Abstract

The invention relates to a biological rotating disc which comprises a disc body and a rotation shaft at the center of the disc body, wherein the disc body is a cylinder without side face, a disc body bracket is arranged between the two bottoms of the cylinder, the disc body bracket divides the disc body into a plurality of filler reactors, openings of the filler reactors are provided with net fences, the filler reactor openings outside the net fences are provided with a plurality of water inlet vanes, the filler reactors are internally provided with a filler which is porous or large in surface area, and the side faces of the filler reactors are also provided with water outlet holes. The biological rotating disc is simple in structure and low in production costs, and provides a quite favorable environment for formation of aerobic biological films, so the wastewater treatment efficiency is remarkably improved. When the thickness of the biological films reaches a certain value, the biological films automatically fall off and flow out with water, and thus no backswing is needed and only the rotation shaft needs periodic maintenance. The biological rotating disc has the structure like a watermill, and when arranged in rivers of a city, the biological rotating disc has a water sight effect and plays a role in beautifying the environment.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a biological turntable. Background technique [0002] At present, my country's domestic sewage and industrial wastewater are increasing day by day. According to my country's 2010 long-term goal plan, my country's urban sewage treatment rate will increase to 25% by the end of this century. At present, domestic and foreign sewage treatment technologies mainly include biological, chemical and physical methods. In the treatment of a large amount of industrial sewage and urban sewage, the biological method is more adopted. The principle of the biological method is to use microorganisms to decompose organic matter, and supplement oxygen through various channels to meet the oxygen required by microorganisms to breathe and decompose organic matter. The process of treating sewage by this biological system usually adopts the special equipment of biological turntable, which can not only supple...

AI Technical Summary

Problems solved by technology

High flow rate can provide sufficient oxygen and nutrients for biofilm, but it is easy to form a single-layer structure with simple structure, while the structure of biofilm formed at low flow rate is complex; rough substrate has unique surface adhesion properties, and more importantly It can provide a huge surface area; sufficient oxygen provides the basic physiological needs for the growth of various microorganisms on the biofilm

[0005] Most of the existing biological turntables have problems such as low pollution control efficiency, complex structure, and high maintenance cost

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