Modified biological carrier used for waste water processing

Abstract

The invention provides a modified biological carrier used for waste water processing. The raw materials comprises the following raw materials, by weight, a basic material: 90-95% of high-density polyethylene, an auxiliary material: 0.2-1% of talcum powder, and modified functional materials: 1-3% of slag powder, 0.5-1.5% of ferric oxide, 0.5-3% of coke and 1-3% of cationic polyacrylamide or polyquaternary salt-10. The modified biocarrier has a density of 0.93-1.05g / cm<3>, the surface is rough, the specific surface area is large, and falling-off of a microbial film adhering to the outer surface of the carrier caused by friction among the carriers can be prevented in water. The biocarrier is mixed with functional materials with positive charges, affinity with microorganisms with negative charges in water can be enhanced and the film culturing cycle is shortened. The biocarrier contains enhanced components of biological enzymes and raises the decomposition capability of pollutants in sewage substantially. The service life of the biocarrier is more than 30 years, and replacing and maintenance are not needed.

Description

Technical field [0001] The present invention relates to a biological carrier for wastewater treatment, in particular to a modified biological carrier for wastewater treatment. Background technique [0002] The biofilm moving bed method is widely used in sewage treatment processes because of its advantages such as stable operation, resistance to high load impact, economy and energy saving. The core technology of the biofilm moving bed method is the biofilm carrier. The characteristics of the biofilm carrier determine the efficiency of the moving bed biofilm treatment process. However, most of the currently produced biofilm carriers are directly made of polymer resin materials such as polyethylene and polypropylene. Therefore, the produced biofilm carriers have poor biocompatibility, the biofilm on the outer surface of the carrier is easy to fall off, and the removal rate of ammonia nitrogen is low. [0003] High-density polyethylene has good heat resistance and cold resistance, goo...

AI Technical Summary

Problems solved by technology

Recently, the patents whose publication numbers are CN1762851A, CN101066800A and CN102887591A disclose the use of high-density polyethylene material as the base material and the addition of modified functional materials to prepare biological carriers. Although the prepared biological carriers have roughness and large specific surface area , long service life and other advantages, but there are also disadvantages such as the long time required for the biological carrier to form a film, and the outer surface of the carrier is not easy to form a film.