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Denitrification filler and method for deep denitrification of municipal sewage

A technology for denitrification and raw materials, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor process control, complex process, large sludge output, etc. The effects of rich raw material sources, simple preparation methods and low environmental adaptability

Active Publication Date: 2018-05-15
中原环保股份有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The disadvantage is that too much carbon source is added, the sludge output is too large, and the filter bed needs to be backwashed regularly in the process
If the process control is not good, it will lead to the increase of effluent COD and the accumulation of nitrite nitrogen.
All in all, the cost is high, the process is complicated, and fine denitrification cannot be carried out

Method used

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  • Denitrification filler and method for deep denitrification of municipal sewage

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Experimental program
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Effect test

Embodiment 1

[0024] Example 1: A denitrification filler prepared from the following raw materials in terms of weight percentage: 1% aluminum powder, 10% aluminum hydroxide, 5% sulfur powder, 20% sodium thiosulfate, and 2% sodium silicate , calcium hydroxide 50%, wood chips 2%, water 10%.

Embodiment 2

[0025] Embodiment 2: A kind of denitrification filler, the difference from Embodiment 1 is that it is prepared from the following raw materials in terms of weight percentage: 1.5% aluminum powder, 11% aluminum hydroxide, 4% sulfur powder, thio Sodium sulfate 23%, sodium silicate 2.5%, calcium hydroxide 48%, wood chips 2%, water 8%.

Embodiment 3

[0026] Embodiment 3: A kind of denitrification filler, the difference with embodiment 1 is that, by weight percentage, it is prepared from the following raw materials: aluminum powder 1%, aluminum hydroxide 9%, sulfur powder 5%, thio Sodium sulfate 25%, sodium silicate 3%, calcium hydroxide 45%, wood chips 3%, water 9%.

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Abstract

The invention discloses denitrification filler and a method for deep denitrification of municipal sewage. The denitrification filler is prepared from the following raw materials by weight percent: 0.5-1.5% of aluminum powder, 8-12% of aluminum hydroxide, 3-8% of sulfur powder, 15-25% of sodium thiosulfate, 1.5-3% of sodium silicate, 40-55% of calcium hydroxide, 1.5-3% of fine sawdust and the balance of water. The denitrification filler is insoluble in the water, can react for a long time, is not powdered or argillation, and is low in cost, rich in source of raw materials and simple in preparation method; the method for the deep denitrification of the municipal sewage combines a chemical method and a biological method, thus having the advantages of being rapid and thorough of the chemical reaction as well as the advantages of being low in cost and having environmental adaptability of the biological method; therefore, the method provided by the invention is an efficient deep denitrification method.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a denitrification filler and a method for deep denitrification of urban sewage. Background technique [0002] With the development of society and the improvement of urbanization level, the current situation of concentrated discharge of pollutants is prominent, and the phenomenon of eutrophication in water bodies is extremely serious, causing many lakes to lose their self-purification ability and putting great pressure on the environment. Therefore, the problem of reducing the degree of eutrophication of water bodies, that is, reducing the concentration of total nitrogen, nitrate nitrogen and nitrite nitrogen in water bodies, is placed in front of various environmental protection units. [0003] At present, almost all the denitrification treatment of sewage plants adopts the biological denitrification method, which has the advantages of low cost and easy operation; the di...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F101/16C02F101/10
CPCC02F3/2806C02F2101/105C02F2101/16C02F2303/04
Inventor 徐玉森王明中杜莉莉许帅邱邵龙包海花
Owner 中原环保股份有限公司
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