Preparation and application of sulfur-based autotrophic and heterotrophic denitrification nitrogen removal biological filler

A technology of heterotrophic denitrification and biological filler, which is applied in the field of advanced wastewater treatment and reuse, can solve the problems of difficult to further improve the treatment efficiency, uneven distribution of biofilm, long time of biofilm formation, etc., and achieve denitrification and operation effect Stabilize, enhance the population richness, and facilitate the effect of attachment growth
CN110467276AActive Publication Date: 2019-11-19NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2019-11-19

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Abstract

The invention discloses preparation and application of a sulfur-based autotrophic and heterotrophic denitrification nitrogen removal biological filler. According to the invention, the number of micropores and silicon hydroxyl groups on the surface of ceramsite is increased through alkali etching; then the surface of the alkali-modified ceramsite is activated by utilizing high-activity disulfur dichloride; and the disulfur dichloride can be chemically bonded with hydroxyl functional groups on the surface of the ceramsite, so sulfur is loaded onto the surface of the ceramsite to form Si-O-S andcross-linking is performed so as to form a stable net-shaped structure. The sulfur-based autotrophic and heterotrophic denitrification nitrogen removal biological filler provided by the invention canrealize coupling of sulfur-based autotrophic and heterotrophic denitrification, is beneficial for the attached growth of microorganisms, reduces the addition of carbon sources, improves population richness, further increases nitrogen removal efficiency and stabilizes effluent quality.
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Description

technical field

[0001] The invention belongs to the technical field of advanced treatment and reuse of wastewater, and more specifically relates to the preparation and application of a sulfur autotrophic and heterotrophic denitrification denitrification biological filler Background technique

[0002] Nitrogen pollution in water bodies has become one of the main problems threatening the quality of water bodies in my country. High levels of nitrogen cause eutrophication of water bodies and the degradation of water environment quality, which threatens people's health. Biological denitrification is widely used in deep denitrification due to its high efficiency and low cost. The secondary effluent deep denitrification processes of sewage plants mainly include biological filter, activated sludge method, advanced oxidation method and constructed wetland. Among them, the denitrification biological filter has the advantages of small footprint, high denitrification efficiency, strong ...

Claims

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