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Industrial sewage denitrification filling material

A technology for industrial sewage and denitrification, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, cumbersome operation, complicated process, etc. The effect is good, the residence time is guaranteed, and the equipment structure is simple.

Inactive Publication Date: 2019-01-18
中原环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to promote this reaction, the conditions of the reaction must be met, that is, there must be enough carbon sources in the wastewater. To be precise, it is BOD: TN=3-5. Calculated according to the average value of 4, almost 90% of sewage plants Facing the shortage of carbon sources, they have no choice but to artificially add carbon sources, some adding sodium acetate, some adding methanol, and some even adding glucose, white sugar, etc., resulting in a great waste of resources
In addition, there are technical risks. Insufficient carbon source will cause the total nitrogen of the effluent to exceed the standard, and excessive carbon source will cause the effluent COD to exceed the standard.
In addition, a large amount of anaerobic sludge is generated during the reaction, which requires regular backwashing, resulting in a large increase in workload
In summary, the current heterotrophic denitrification process is costly, complex, cumbersome and risky

Method used

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  • Industrial sewage denitrification filling material
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, a packing for denitrification of industrial sewage comprises filter layer 1, reaction layer 2 and purification layer 3 in sequence according to the water inlet direction, the thickness of the filter layer 1 is 150 mm, and the thickness of the purification layer 3 is 250 mm; The filter layer 1 is filled with quartz sand with a particle diameter of 10mm, the purification layer 3 is filled with volcanic rock with a particle diameter of 3mm, and the reaction layer 2 is filled with mixed particles; the mixed particles are calcium carbonate, sodium thiosulfate and sulfur powder; the filling degree of the mixed particles in the reaction layer 2 is 360g / dm 3 .

[0022] The preparation method of the mixed particles is as follows: mix slaked lime, sodium thiosulfate and sulfur powder in a weight ratio of 1:1:1 to obtain mixed powder; then add water to the mixed powder, the amount of water added is the 15% of the total weight of the above-mentioned mix...

Embodiment 2

[0024] Such as figure 1 As shown, a packing for denitrification of industrial sewage comprises filter layer 1, reaction layer 2 and purification layer 3 in sequence according to the water inlet direction, the thickness of the filter layer 1 is 250 mm, and the thickness of the purification layer 3 is 350 mm; The filter layer 1 is filled with quartz sand with a particle diameter of 15mm, the purification layer 3 is filled with volcanic rock with a particle diameter of 5mm, and the reaction layer 2 is filled with mixed particles; the mixed particles are calcium carbonate, sodium thiosulfate and sulfur powder; the filling degree of the mixed particles in the reaction layer 2 is 420g / dm 3 .

[0025] The preparation method of the mixed granules is as follows: mix slaked lime, sodium thiosulfate and sulfur powder in a weight ratio of 1:4:3 to obtain a mixed powder; then add water to the mixed powder, and the amount of the water added is the 20% of the total weight of the above-ment...

Embodiment 3

[0027] Such as figure 1 As shown, a packing for denitrification of industrial sewage comprises filter layer 1, reaction layer 2 and purification layer 3 in sequence according to the water inlet direction, the thickness of the filter layer 1 is 300mm, and the thickness of the purification layer 3 is 300mm; The filter layer 1 is filled with quartz sand with a particle diameter of 12mm, the purification layer 3 is filled with volcanic rock with a particle diameter of 4mm, and the reaction layer 2 is filled with mixed particles; the mixed particles are calcium carbonate, sodium thiosulfate and sulfur powder; the filling degree of the mixed particles in the reaction layer 2 is 400g / dm 3 .

[0028] The preparation method of the mixed granules is as follows: mix slaked lime, sodium thiosulfate and sulfur powder in a weight ratio of 1:3:2 to obtain a mixed powder; then add water to the mixed powder, and the amount of the water added is the 18% of the total weight of the above-mentio...

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Abstract

The invention discloses an industrial sewage denitrification filling material, which sequentially comprises a filter layer, a reaction layer and a purification layer in the water inlet direction, wherein quartz sand with the particle diameter being 10 to 15mm is filled in the filtering layer; the purification layer is filled with volcanite with the particle diameter being 3 to 5mm; the reaction layer is filled with mixed particles; the mixed particles are mixtures of calcium carbonate, sodium thiosulfate and sulfur powder. The filling material has the advantages that the structure is simple; the raw material reserves are rich; the carburizing limitation in a conventional process is not needed; the denitrification efficiency is high; the effect is good.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an industrial sewage denitrification filler. Background technique [0002] With the concentration of industrialization and the process of population urbanization, water pollution has become an unavoidable problem. In particular, the pollution of nitrogen and phosphorus in drainage has caused more obvious harm to the environment. The current removal method of total nitrogen pollution (nitrate nitrogen accounts for about 90% of the total nitrogen in urban sewage plant drainage) is to use anaerobic microorganisms to carry out heterotrophic denitrification in the presence of carbon sources, and nitrate in water Nitrogen is reduced to nitrogen gas, thereby leaving the water body to achieve the purpose of water purification. [0003] In order to promote this reaction, the conditions of the reaction must be met, that is, there must be enough carbon sources in the wastewater. ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/16
CPCC02F1/001C02F1/281C02F1/58C02F9/00C02F2101/163C02F2101/166C02F2301/08
Inventor 徐玉森许帅陈煜谢佳张晓威刘筱诗
Owner 中原环保股份有限公司