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Water treatment denitrification filler and preparation method thereof

A technology for water treatment and denitrification, applied in water treatment parameter control, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of unfavorable microbial film formation and stability, affecting reaction effect, limited adsorption capacity, etc. problems, to achieve the effects of stable and long-lasting biological denitrification performance, improved removal rate, and developed porosity

Active Publication Date: 2021-03-30
华夏碧水环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compound filler does not form an organic whole, it is only a combination of three substances, and it is very easy to cause adverse material exchange when it is put into the reactor, which affects the reaction effect.
And the packing density is still high, and the porosity is low, the adsorption capacity is limited, which is not conducive to the film formation and stability of microorganisms, and the bacteria need to be supplemented during use

Method used

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  • Water treatment denitrification filler and preparation method thereof
  • Water treatment denitrification filler and preparation method thereof
  • Water treatment denitrification filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of filler A: prepare oxalic acid solution of 20g / L; uniformly grind pyrite and sulfur into fine powder with a particle size of 5-10nm, and mix pyrite and sulfur particles at a mass ratio of 3:7 After uniformity, add it to the oxalic acid solution, and let it soak for 5 hours; take out the mixed pyrite and sulfur obtained in the above steps and dry it to obtain filler A.

[0028] (2) Preparation of filler B: Dissolve 13g of manganese nitrate and 21g of oxalic acid in dimethylformamide (DMF) solution, transfer them to a hydrothermal reactor after they are completely dissolved, and react in the hydrothermal reactor for 6 hours. The temperature is 100°C. After the reaction, cool at room temperature, wash with DMF solution for 3 times, filter with suction and dry in a drying oven for 2 days to obtain filler B.

[0029] (3) Preparation of denitrification filler: Mix filler A and filler B uniformly at a ratio of 8:2, then add to oxalic acid solution with a conc...

Embodiment 2

[0031](1) Preparation of filler A: Prepare 30g / L p-hydroxybenzoic acid solution; uniformly grind pyrite and sulfur into fine powder with a particle size of 1-50nm, and the mass ratio of pyrite and sulfur particles is 1:1.5 After mixing evenly, add it to the p-hydroxybenzoic acid solution, and let it stand for soaking for 3 hours; take out the mixed pyrite and sulfur obtained in the above steps and dry it to obtain filler A.

[0032] (2) Preparation of packing B: mix 10gMn(ClO 4 ) 2 •6H 2 O and 30g of 3,5-imidazoledicarboxylic acid were dissolved in dimethylformamide (DMF) solution, transferred to a hydrothermal reactor after all dissolved, and reacted in the hydrothermal reactor for 16 hours at a temperature of 100°C, and the reaction was completed Afterwards, cool at room temperature, wash with DMF solution for 3 times, filter with suction and dry in a drying oven for 3 days to obtain filler B.

[0033] (3) Preparation of denitrification filler: Mix filler A and filler B u...

Embodiment 3

[0037] Compare the removal effects of the fillers in Examples 1 and 2 and Comparative Example 1 on COD, ammonia nitrogen, total nitrogen, and total phosphorus.

[0038] The reaction device is an aeration reactor with a volume of 15L. The filling volume of the filler is 5kg.

[0039] The test water sample is rural domestic sewage in a certain place, the influent COD is 100~150mg / L, the nitrate nitrogen is 45~60mg / L, the total nitrogen is 60~70mg / L, the total phosphorus is 3~5mg / L, and the test period is 1 In 1 month, under the condition of continuous water inflow, the removal efficiency of three kinds of fillers for pollutants was compared.

[0040] Comparing the fillers of Examples 1 and 2 with Comparative Example 1, it can be seen that the microbial film formation of the fillers of Examples 1 and 2 is formed after 12 to 15 days, and there is no need to add sulfur autotrophic bacteria in the follow-up; the water is discharged after the microbial film formation The total nitr...

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Abstract

The present invention provides a water treatment denitrification filler and a preparation method thereof, the denitrification filler comprises a filler A and a filler B, the filler A is formed by uniformly mixing pyrite and sulfur according to any ratio, the surface of the filler A is coated with a surface modifier, and the surface modifier is a carboxylic acid compound; the filler B is synthesized by coordination of transition metal ions and carboxyl-containing organic matters; and the denitrification filler is a sphere with the particle size of 2-4cm. The denitrification filler has the advantages of low density, large specific surface area, developed pores, certain catalytic performance, facilitation of quick formation of a biological membrane, lasting and stable biological denitrification performance, and high denitrification and dephosphorization efficiency.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a water treatment denitrification filler and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of industry and global urbanization, as well as the continuous improvement of residents' living standards, the use of various washing powders, detergents and other chemicals has caused serious excess of nitrogen, phosphorus and other elements in water bodies. my country's "Urban Sewage The Discharge Standard of Pollutants for Treatment Plants (GB18918-2002) Class A Discharge Standard stipulates the maximum allowable discharge concentration of total nitrogen 15mg / L, and the phosphorus content in water > 0.2mg / L may make the water eutrophic. In turn, it causes the water body to become black and smelly, leading to the deterioration of the ecological environment of the water body, and the excessive discharge of nitrogen has cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/34
CPCC02F3/00C02F3/34C02F2203/006C02F2209/08C02F2209/14C02F2209/16
Inventor 侯亚平张传兵郭倩倩徐亚慧王慧芳庄云萍徐漫漫侯亚龙雷贤东赵金中罗建辉康健代攀张辉
Owner 华夏碧水环保科技股份有限公司
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