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Biological stuffing for denitrification

A biological filler and denitrification technology, applied in anaerobic digestion treatment and other directions, can solve the problems of unstable distribution of biological flora, poor denitrification effect, damage to suspension brackets, etc., to achieve high load resistance, strong biological adhesion, Easy to install effect

Inactive Publication Date: 2015-11-04
北京科净源科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The improved sewage treatment technology adopts the method of putting filler in the nitrification tank, usually by hanging biological filler, but when it is used for a long time, the filler is blocked by a large amount of biological sludge, which makes the biofilm not easy to fall off, and the hanging bracket is often used. is damaged, the denitrification effect is getting worse and worse
At present, there is still a method of directly putting the biofiller into the pool and using the mechanical stirring equipment in the pool to ensure the uniform distribution of the biofiller in the pool and the regeneration of the biofilm. This denitrification method has high operating costs and biological flora. Unstable distribution, large sludge production, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] The shell of the denitrification biological filler is made of polypropylene material into a black hollow sphere, the diameter of the sphere is 100mm, and more than 60 mesh holes are arranged on the surface of the shell. The biocarrier filler is composed of nano-modified polyurethane cuboid block particles and porous mineral particles in a ratio of 9:1, wherein the nano-modified polyurethane cuboid block particles have a porosity of 90% and a specific surface area of ​​2000m 2 / m 3 , Bulk density is 10kg / m 3 , the length, width and height of the cuboid block are 20mm, 20mm and 40mm respectively; the porosity of the porous mineral particles is 80%, and the specific surface area is 1500m 2 / m 3 , The bulk density is 800kg / m 3 , Porous mineral particles are made of volcanic rock as a raw material into an approximately circular shape with a diameter of 20mm. After the biological carrier filler is made, it is filled into the black hollow sphere, and the filling rate is 35...

example 2

[0020] The shell of the denitrification biological filler is made of polypropylene material into a black hollow sphere, the diameter of the sphere is 200 mm, and more than 70 mesh holes are set on the surface of the shell. The biocarrier filler is composed of nano-modified polyurethane cuboid block particles and porous mineral particles in a ratio of 8:2, wherein the nano-modified polyurethane cuboid block particles have a porosity of 93% and a specific surface area of ​​2300m 2 / m 3 , The bulk density is 13kg / m 3 , the length, width and height of the cuboid block are 20mm, 20mm and 40mm respectively; the porosity of the porous mineral particles is 83%, and the specific surface area is 1800m 2 / m 3 , The bulk density is 850kg / m 3 , Porous mineral particles are made of volcanic rocks into approximately circular shapes with a diameter of 30mm. After the biological carrier filler is made, it is filled into the black hollow sphere, and the filling rate is 50%. After the filli...

example 3

[0022] The shell of the nitrogen-removing biological filler is made of polypropylene material into a black hollow sphere with a diameter of 300 mm, and more than 65 mesh holes are arranged on the surface of the shell. The biocarrier filler is composed of nano-modified polyurethane cuboid block particles and porous mineral particles in a ratio of 7:3, wherein the nano-modified polyurethane cuboid block particles have a porosity of 95% and a specific surface area of ​​2500m 2 / m 3 , The bulk density is 15kg / m 3 , the length, width and height of the cuboid block are 20mm, 20mm and 40mm respectively; the porosity of the porous mineral particles is 85%, and the specific surface area is 2000m 2 / m 3 , The bulk density is 900kg / m 3 , Porous mineral particles are made of volcanic rock as a raw material into an approximately circular shape with a diameter of 50mm. After the biological carrier filler is made, it is filled into the black hollow sphere, and the filling rate is 85%. A...

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Abstract

The invention relates to a biological stuffing for denitrification. The biological stuffing for denitrification comprises a spherical shell, wherein a plurality of meshes are formed in the surface of the shell, the shell is filled with a biological carrier stuffing, and the biological carrier stuffing is formed by combining two types of granular substance made from different materials. One granular substance is cuboid massive particles made from a nano modified polyurethane material, the other granular substance is porous mineral particles, and the filling rate of the biological carrier filler in the shell is 35%-85%. The biological stuffing for denitrification has the advantages that the biological stuffing for denitrification is large in specific surface area, high in porosity, high biological adhesion, high in biofilm formation speed, high in anti-load capacity, high in denitrification efficiency, small in biological sludge yield, good in chemical and biological stability and durable, enables biofilm formation to be easy, is resistant to aging, acid and alkali, can be arranged directly without fixing and is convenient to install, no harmful substance is not dissolved, and secondary pollution is not caused.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an anoxic denitrification biological filler used in a sewage treatment system. Background technique [0002] In the process of sewage treatment, anoxic denitrification treatment is a link that plays a key role in the whole sewage treatment system. Usually, the denitrification treatment adopts the large return flow of sludge to the nitrification tank for denitrification treatment. This treatment method needs to arrange stirring equipment in the nitrification tank to ensure the uniform distribution of biological bacteria, which not only increases the operating cost, but also generates a lot of pollution. mud. The improved sewage treatment technology adopts the method of putting filler in the nitrification tank, usually by hanging biological filler, but when it is used for a long time, the filler is blocked by a large amount of biological sludge, which makes the biofilm not easy to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 葛敬李玲玲
Owner 北京科净源科技股份有限公司
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