Preparation method of microbial carrier taking sludge as raw material

Abstract

The invention discloses a microbial carrier taking sludge as a raw material and a preparation method thereof. The microbial carrier comprises the following raw materials: dehydrated cement powder, cement, fly ash, zeolite powder, diatomite and bentonite in a weight ratio of (0.5-3): (6-10): (2-6): (3-8): (1-3): (2-4). The preparation method of the dewatered cement powder comprises the following steps: removing impurities from sludge or sludge, and performing standing and precipitating; reserving and dehydrating lower-layer settled sludge; performing drying at 95-105 DEG C until the weight is constant, and performing cooling, grinding and sieving to obtain a dewatered cement powder crude product; and finally, adding a biological enzyme solution into the dewatered cement powder crude product, performing uniform mixing and stirring, putting the mixture into a closed container, performing sealing for 15-24 hours, and obtaining the dewatered cement powder. According to the invention, the sludge or sludge in the river is treated by the biological enzyme and then is combined with the cement, the fly ash, the zeolite powder, the diatomite, the bentonite (montmorillonite) and other materials for use, so that the microbial proliferation rate of the prepared carrier is remarkably improved, and the treatment effect on total nitrogen and nitrate nitrogen in sewage is improved.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, in particular to a microbial carrier using sludge as a raw material. Background technique [0002] With the rapid development of the water environment treatment industry, the amount of activated sludge produced by dredging is increasing. Because activated sludge is characterized by high water content, loose structure, high content of organic matter, and toxic and harmful substances (such as microorganisms, heavy metals, and toxic organisms), it has become an important environmental problem and needs to be dealt with through effective means. At present, sludge utilization has become one of the important methods of sludge treatment. Dredged sludge has a wide range of sources and is cheap and easy to obtain. It can be used as a microbial carbon source material to provide a space for microorganisms to grow and attach. At the same time, the sludge can be used as a resource, reducing the amou...

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Problems solved by technology

[0006] Although the above-mentioned microbial carriers can enrich microorganisms to a certain extent and promote microbial proliferation, the physical and mechanical properties of the carriers are limited, the durability of use is not high, and the mass transfer and adsorption capabilities need to be strengthened urgently.

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