Preparation method of hydrogel embedded microorganism carrier

Abstract

The invention relates to the technical field of preparation of microorganism carriers and in particular relates to a preparation method of a hydrogel embedded microorganism carrier. The preparation method comprises the following steps: extracting root nodule bacteria extract from soybean roots and mixing the root nodule bacteria extract with a lactobacillus alimentarius strain to prepare a mixed strain; inoculating active sludge with the mixed strain to obtain active sludge bacterium liquid; adding nutrient substances into the active sludge bacterium liquid and culturing to obtain sludge turbid liquid; mixing a polyurethane pre-polymer and the sludge turbid liquid and pouring a mixture into a mold; adding activated carbon powder, a catalyst, an initiator and the like and reacting to obtaina polyurethane embedded nitrifying bacterium gel block; finally, dicing the polyurethane embedded nitrifying bacterium gel block and mixing with self-made activated nano-powder to obtain a loading matrix; then immersing and carrying out film formation to obtain the hydrogel embedded microorganism carrier. According to the preparation method provided by the invention, nitrogen source pollutants insewage can be effectively degraded through re-nitrifying bacteria, and the hydrophilicity of the microorganism carrier is improved through hydrogel prepared from potassium persulfate and tetramethylethylenediamine; the biological resistance of root nodule bacteria is strong; the preparation method has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of microbial carrier preparation, in particular to a method for preparing a hydrogel-embedded microbial carrier. Background technique [0002] With the rapid development of my country's industry and agriculture and the continuous acceleration of urbanization, urban domestic sewage treatment has become the primary problem to be solved in order to realize the sustainable development of my country's economy and society and build an ecologically harmonious homeland. Biological sewage treatment technology represented by activated sludge has been widely used in the treatment of urban and industrial sewage. However, the traditional activated sludge technology still needs to be further improved in terms of reducing the total nitrogen in the effluent of sewage plants. At the same time, the large amount of excess sludge produced has also become a secondary pollution source, so the scope of use is limited. [0003] At...

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Problems solved by technology

[0007] The technical problem mainly solved by the present invention is that in the sewage treatment industry, most of the microbial carriers can only form biofilm on the surface, the amount of fixed microorganisms is relatively small, the microbial carriers have poor hydrophilicity and biological affinity, and the microorganisms grow The reproduction speed is slow, the concentration of microorganisms is low, etc. In addition, there are also defects such as poor microbial stability and easy loss of activity caused by the impact of water flow. A preparation method for hydrogel-embedded microbial carriers is provided.

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