Preparation method of slow-release carbon source filter material taking starch and polyvinyl alcohol as substrates

Abstract

The invention discloses a preparation method of a slow-release carbon source filter material taking starch and polyvinyl alcohol as substrates, is applied to one-time adding of carbon sources for biological denitrification of raw water with a low carbon nitrogen ratio, and belongs to the technical field of water treatment. The preparation method of the filter material comprises steps as follows: (1), starch acetate, an emulsifying agent and polyvinyl alcohol are uniformly blended in hot water, cooled, cut and dried into solid grains, and the solid grains are taken as internal carbon sources for standby; (2), ordinary corn starch, an emulsifying agent and polyvinyl alcohol are uniformly blended in hot water, sulfur powder and the internal carbon source grains are added, the internal carbon sources are secondarily packaged and injected into a mold for cooling forming; (3), the packaged carbon source filter material is put into a boric acid solution for soaking, surface crosslinking is performed, and then the material is dried and washed for standby. The prepared slow-release carbon source filter material meets requirements of mechanical strength, carbon release rate, carbon source quality and long use period, and stable carbon sources and growth and metabolism occasions are provided for microorganism denitrification.

Description

technical field

[0001] The invention relates to a preparation method of a slow-release carbon source filter material with two kinds of starch and polyvinyl alcohol (PVA) as the base material, which is applicable to biological The invention relates to one-time dosing of a carbon source for denitrification and denitrification, and belongs to the technical field of water treatment. Background technique

[0002] At present, the key problem of the shortage of raw water carbon source is involved in the use of biological denitrification and denitrification process in the recycling of sewage, the restoration of nitrate pollution in groundwater and the treatment of lake water pollution, which has become a constraint to the development of such water treatment projects. Key factor. In actual engineering, in order to obtain the ideal effect of biological denitrification denitrification, the method of adding small molecule carbon source is often adopted to supplement the electron donor ...

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