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Denitrification and dephosphorization filler for sewage and preparation method thereof

A technology for denitrification and dephosphorization, sewage, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem of inability to absorb and enrich nitrate, lack of denitrification and denitrification, and affect treatment rate, etc. problems, to achieve the effect of improving phosphorus removal effect, improving nitrogen removal effect, and broad application prospects

Inactive Publication Date: 2020-01-03
深圳杜尔环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(Modified) biochar can have a good adsorption effect on nitrate, but it lacks denitrification and denitrification, and cannot fundamentally remove nitrogen
Solid carbon sources can provide the organic matter required for denitrification, but cannot absorb and enrich nitrate, which affects the treatment rate
If the filler can release iron ions for a long time and form precipitation with phosphate, the long-term chemical phosphorus removal effect can be achieved, but it is difficult for the filler to have this function at present
[0004] In short, the currently used fillers have limited denitrification and phosphorus removal capabilities, and the processing load is very low, requiring a large amount of use, resulting in the problem of a large area.

Method used

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  • Denitrification and dephosphorization filler for sewage and preparation method thereof
  • Denitrification and dephosphorization filler for sewage and preparation method thereof
  • Denitrification and dephosphorization filler for sewage and preparation method thereof

Examples

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Embodiment 1

[0031] Take 40 parts of wheat straw, wash them with distilled water, soak them in 1.5mol / L ferric chloride solution for 12 hours, take them out and put them in a constant temperature drying oven to dry at 80°C, then put them in a muffle furnace and roast them under anaerobic conditions for 3 hours , the calcination temperature is 400° C. and carbonized for 3 hours, taken out and pulverized with a pulverizer, and obtained modified biochar powder with a particle size of less than 50 meshes with a sieve. Take 30 parts of wheat straw, wash it with distilled water, take it out and put it in a constant temperature drying oven to dry at 80°C, take it out and grind it with a pulverizer, and use a sieve to obtain solid carbon source powder with a particle size of less than 100 mesh. Take 40 parts of iron powder, 30 parts of carbon powder and 7 parts of bentonite with particle diameters less than 100 mesh, mix with 20 parts of cement and the above-mentioned modified biochar and solid car...

Embodiment 2

[0033] Take 40 parts of wheat straw, wash them with distilled water, soak them in 1.5mol / L ferric chloride solution for 18 hours, take them out and dry them in a constant temperature drying oven at 80°C, then put them in a muffle furnace and roast them under anaerobic conditions for 3 hours , the calcination temperature is 400°C and carbonized for 3.5 hours, take it out and pulverize it with a pulverizer, and use a sieve to obtain modified biochar powder with a particle size of less than 50 mesh. Take 30 parts of wheat straw, wash it with distilled water, take it out and put it in a constant temperature drying oven to dry at 80°C, take it out and grind it with a pulverizer, and use a sieve to obtain solid carbon source powder with a particle size of less than 100 mesh. Take 40 parts of iron powder, 30 parts of carbon powder and 7 parts of bentonite with particle diameters less than 100 mesh, mix with 25 parts of cement, the above-mentioned modified biochar and solid carbon sour...

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Abstract

The invention discloses a denitrification and dephosphorization filler for sewage and a preparation method thereof. The denitrification and dephosphorization filler for sewage comprises the followingcomponents in parts by weight: 30-50 parts of iron powder, 20-50 parts of carbon powder, 5-10 parts of bentonite, 15-30 parts of cement, 20-50 parts of modified charcoal and 20-40 parts of a solid carbon source. The preparation method comprises the following steps: preparation of the modified charcoal; preparation of the solid carbon source; mixing; granulating; and drying. The denitrification anddephosphorization filler for sewage has good nitrogen and phosphorus removal efficiency and a stable structure; and the preparation method is simple and has low cost, and the prepared filler has goodapplication prospects.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a sewage nitrogen and phosphorus removal filler and a preparation method thereof. Background technique [0002] Excessive discharge of nitrogen and phosphorus can easily cause eutrophication of water bodies and deteriorate water quality. The concentration of total nitrogen and total phosphorus in the effluent are two important indicators in sewage treatment. The biological nitrogen and phosphorus removal process has been widely used in sewage treatment because of its low treatment cost and good treatment effect, and the most widely used one is A 2 / O process or its improved process. However, due to problems such as insufficient concentration of influent organic matter and different sludge ages between nitrogen-removing bacteria and phosphorus-removing bacteria, the nitrogen and phosphorus removal effect of the biological nitrogen and phosphorus removal process is affected. At pres...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/28C02F3/28C02F101/10C02F101/16
CPCC02F1/283C02F1/461C02F3/28C02F2101/105C02F2101/16
Inventor 陈静温玉陈英
Owner 深圳杜尔环境科技有限公司
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