A kind of oil shale semi-coke/polyvinyl alcohol composite immobilization carrier and its preparation method

Abstract

The invention discloses an oil shale semi-coke / polyvinyl alcohol composite immobilized carrier and a preparation method thereof, belonging to the technical field of sewage treatment. Specifically, polyvinyl alcohol is dissolved in deionized water to prepare a uniform transparent polyvinyl alcohol solution; then oil shale semi-coke is added to the above polyvinyl alcohol solution, and stirred at high temperature to form a uniform mixed solution; then OP‑ 10. Sulfuric acid and formaldehyde are solidified and shaped at high temperature after stirring, washed, cut into pieces, and dried to obtain the composite immobilized carrier. The composite immobilized carrier is in the shape of a porous sponge with a density of 0.22-0.30 g / cm 3 , the porosity is 60-92%, and the pore diameter is 1-4mm. The raw material of the invention is easy to obtain, the production process is simple, the cost is low, and at the same time, the problem of environmental pollution by by-products of oil shale is solved. The method of the invention has great application value and prospect in the field of sewage treatment.

Description

A kind of oil shale semi-coke / polyvinyl alcohol composite immobilization carrier and preparation method thereof technical field The invention belongs to the technical field of sewage treatment, relate to a kind of microbial immobilization carrier for sewage treatment process In particular, it relates to an oil shale semi-coke / polyvinyl alcohol composite immobilization carrier and a preparation method thereof. Background technique my country's water environment pollution situation is increasingly serious, and the demand for developing new technologies and new materials for efficient wastewater treatment is becoming more and more important. urgent. Traditional sewage biochemical treatment process adopts microbial immobilization technology, and the dominant bacterial species that will be selectively screened out be fixed, thus constituting an efficient wastewater treatment system. Compared with the ordinary activated sludge method, this technology has many advantages. ...

AI Technical Summary

Problems solved by technology

At present, oil shale semi-coke is mainly used as low-quality coal fuel and sold to low-quality coal power plants and cement plants, but the amount of use is limited. Most of the semi-coke is stored on the soil as waste, causing damage to the soil environment and surrounding vegetation.

In addition, the selling price of semi-coke is relatively low, about 15% of the oil shale mining cost, causing serious cost inversion in the industrial chain