Microorganism carrier for sewage treatment

Abstract

The invention relates to a microorganism carrier for sewage treatment. The microorganism carrier comprises an outer ring, a middle ring and an inner ring which are sequentially distantly arranged fromoutside to inside, wherein the outer ring and the middle ring as well as the middle ring and the inner ring are fixedly connected through supporting frames respectively; first protruding strips and second protruding strips are arranged on the outer circumferential surface and the inner circumferential surface of the outer ring respectively; third protruding strips are arranged on the inner and outer sides of the middle ring and the inner and outer sides of the inner ring; materials of the outer ring, the middle ring, the inner ring and a plurality of supporting frames comprise the following components in percentage by weight: 90-95% of low-pressure polyethylene as a base material, 2-3% of talcum powder as an auxiliary material, and 2.5-5.5% of slag powder or polyvinyl alcohol and 0.8-2.8%of coke as hydrophilic functional material. The microorganism carrier uses the low-pressure polyethylene as the base material, has relatively high rigidity, toughness and wear resistance, good mechanical strength, relatively good dielectric performance and relatively good environmental stress cracking resistance, and is very suitable for the working environment of the microorganism carrier; at room temperature, the microorganism carrier is insoluble in any organic solvent and is resistant to acid, alkali and salt corrosion.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a microbial carrier used for sewage treatment. Background technique [0002] Applied to urban sewage and industrial sewage treatment, the most commonly used biological treatment methods are activated sludge method and biofilm method. The activated sludge method has a history of nearly 90 years since it was established in 1914 in Manchester, England. It is the earliest and most mature process in the field of sewage biological treatment. However, there are many problems in the process of using the activated sludge process, such as: large area, large amount of residual sludge, poor denitrification effect, high management costs, prone to sludge bulking and sludge loss, etc. The biofilm method has a higher organic load and a shorter contact residence time, which reduces the occupied area and saves investment. In addition, there is no problem of sludge bulking and sludge return when t...

AI Technical Summary

Problems solved by technology

Due to the increasingly limited land occupation and use space of the sewage treatment system and the relatively harsh sewage environment, the specific surface area, porosity, carrier filling rate and treatment efficiency of the existing microbial carriers are increasingly unable to meet the needs of existing production

In addition, microbial carriers generally use elastic three-dimensional fillers, which cannot improve the activity of microorganisms, nor can they improve the metabolic processing capacity of attached microorganisms.

Images