A kind of clay carrier for sewage treatment and preparation method thereof

Abstract

The invention relates to a clay carrier for wastewater treatment and a preparation method of the clay carrier. The clay carrier is characterized by being prepared by the following steps: configuring the following raw materials in percentage by weight: 55-65 percent of foundry waste sand, 30-40 percent of loess and 4-6 percent of sewage sludge, mixing the raw materials, grinding, aging, forming, drying, sintering and screening to prepare a finished product. According to the preparation method disclosed by the invention, the clay carrier is prepared by virtue of the processes in an ageing stage, a forming stage, a drying stage and a sintering stage. According to the clay carrier and the preparation method disclosed by the invention, pollutants including the foundry waste sands and the sewage sludge are recycled and utilized; as the main component of the product is silicate, the clay carrier is neutral in water so as to be beneficial to attachment increment of microorganisms; and the raw materials are simple and easy to acquire, and the technological standard is easy in controlling.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a clay carrier used for sewage treatment and a preparation method thereof. Background technique [0002] With the reduction of water resources, sewage treatment is getting more and more attention. Modern sewage treatment mostly adopts biological methods, which use the decomposition ability of microorganisms to degrade the organic components in sewage and purify water bodies. The use of microorganisms to treat sewage requires the attachment of microorganisms to the carrier, and placing the carrier in the sewage can effectively utilize the microorganisms for a long time. Most of the microbial carriers used in sewage treatment in the early days were gels such as sodium alginate, carrageenan, and polyvinyl alcohol. Due to the poor biochemical stability, low mechanical strength, and high cost of these substances, industrial applications are limited. Subsequently, people began to stud...

AI Technical Summary

Problems solved by technology

Not only that, the affinity between the carrier and the microorganisms is small, and the microorganisms attached to it will fall off, and the time required for microorganism cultivation due to frequent falloffs

It takes a long time to form microbial carriers, and the cultured microorganisms tend to fall off, resulting in low sewage treatment efficiency, and the treated water is easy to deteriorate again, etc.

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