A kind of denitrification and phosphorus removal foam filler and preparation method thereof

Abstract

The invention relates to a denitrification and dephosphorization foaming filler and a preparation method thereof. The denitrification and dephosphorization foaming filler is composed of the following raw materials in parts by weight: 20-70 parts of polyurethane, 10-50 parts of oyster shell powder, starch 10-30 parts, 5-20 parts of pyrite powder, 4-10 parts of talcum powder, 2-10 parts of white carbon black, and 0.5-2 parts of zinc stearate; the preparation method of denitrification and phosphorus removal foaming filler is polyurethane 20-70 parts, oyster shell powder 10-50 parts, starch 10-30 parts, pyrite powder 5-20 parts, talc 4-10 parts, white carbon black 2-10 parts, zinc stearate 0.5-2 parts Compared with the prior art, the denitrification and phosphorus removal foam filler prepared by the present invention has developed pore structure, autotrophic denitrification and denitrification and Phosphorus removal can deeply remove nitrogen and phosphorus in sewage, and the sludge produced is easy to clean, the hydraulic retention time is short, and there is no hardening phenomenon after long-term use, which is suitable for industrialization.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a denitrification and dephosphorization foaming filler and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of the national economy and urbanization, a large amount of nitrogen, phosphorus nutrients and organic matter have been discharged into surface water bodies, resulting in eutrophication of water bodies and decline of water functions. Low-polluted water has become a new difficulty in water environment management. Although my country's water pollution has improved through the comprehensive treatment of major national water projects, the current ecological security situation of the water environment is still not optimistic. [0003] The core of deep denitrification and phosphorus removal in low-polluted water is the removal of nitrate and inorganic phosphorus. In the prior art, such as a sewage treatment fil...

AI Technical Summary

Problems solved by technology

It can be seen that most of the existing patented technologies use the idea of ​​"heterotrophic denitrification + chemical precipitation phosphorus removal" to remove nitrogen and phosphorus in sewage. The biggest disadvantage of heterotrophic denitrification is the addition of carbon sources. The dosage is difficult to control, the dosage lower than the requirement will lead to incomplete nitrate treatment, and the dosage higher than the dosage will increase the sludge production; secondly, the disadvantage of chemical precipitation phosphorus removal is that it needs to spend a lot of time to fix the phosphorus Substantial scraping costs to remove it from the water