Nitrogen and phosphorus removal composite filler and purification device containing same

Abstract

The invention relates to a nitrogen and phosphorus removal composite filler which comprises lignocellulose, a metal substance, oligosaccharide and a biological enzyme. The invention relates to a purification device which comprises a treatment tank and a composite filler, wherein the composite filler is applied to a suspended type or a fixed type in a purification tank. When the composite filler is suspended, the composite filler can be prepared into a spherical shape; when the composite filler is fixed, the composite filler can be prepared into a square shape. Lignocellulose is used as a slow-release carbon source and a biofilm formation carrier, provides a carbon source as an electron donor for denitrification of denitrifying bacteria, reduces nitrate nitrogen into nitrogen, and realizes sewage denitrification; metal substances can reduce the oxidation-reduction potential of a water body so as to facilitate survival of denitrifying bacteria, stimulate microbial evolution to increase the diversity, strengthen microbial aggregation to increase the biomass and improve the biodegradability, and phosphorus in sewage can be removed through adsorption and precipitation of metal ions; the nitrogen and phosphorus removal composite filler is mainly used for efficient nitrogen removal of domestic sewage, river and lake water bodies, aquaculture wastewater and the like, and has a certain phosphorus removal function.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a nitrogen and phosphorus removal composite filler and a purification device containing the same. Background technique [0002] Nitrogen pollution is one of the most serious problems faced by various water bodies in my country. my country's current highest total nitrogen discharge standard is Class A (GB18918-2002), but the Class A total nitrogen limit (≤15mg / L) is the surface water Class IV (total nitrogen ≤ 1.5mg / L), its secondary pollution to the water body cannot be ignored, especially when the discharged water body is a closed water body, it is even more difficult to meet the water quality requirements, so economical and efficient deep denitrification is urgently needed technology. In addition, with the continuous development of my country's economy, the increase in the use of nitrogen and phosphorus substances, and the use of a large number of agricultural chemical f...

AI Technical Summary

Problems solved by technology

However, most natural cellulose materials have low mechanical strength and short service life

Since the plant carrier may block the system after the release period is over, it is generally necessary to set up a separate dosing area for future maintenance and operation. Therefore, if the life of the filler is too short and the mechanical strength is insufficient, the cost and difficulty of operation and maintenance will increase.

In addition, the total nitrogen removal rate of pure cellulose carbon source materials is difficult to reach more than 70% in practical applications, and the nitrogen removal effect needs to be improved.

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