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Deep denitrification process and equipment for high-nitrogen-content organic wastewater

A technology for organic waste water and deep denitrification, applied in water pollutants, water/sewage treatment, light water/sewage treatment, etc., can solve the problems of high price of bipolar membrane, high cost of waste water treatment, high environmental requirements, etc., to achieve treatment The process is safe and environmentally friendly, improves the efficiency of sewage treatment, and does not produce secondary pollution effects

Inactive Publication Date: 2020-06-12
ANJIEYU BEIJING OILFIELD TECHNICAL SERVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this patent: At present, the development of domestic bipolar membranes is immature, relying on a large number of imports, and the price of bipolar membranes is very high, resulting in an increase in the cost of wastewater treatment
The disadvantages of this patent: it requires the combined use of electrodialysis and biochemical reactions, the steps are complicated, and the requirements for the environment are high
The disadvantage of this patent: the water consumption is relatively large when electrodialysis is used, and it only targets ammonia nitrogen in water, and the removal rate of total nitrogen is relatively low
[0007] In summary, the existing deep denitrification process for high nitrogen-containing organic wastewater still has the disadvantages of high treatment cost, complicated steps, high environmental requirements, and low removal rate of total nitrogen.

Method used

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  • Deep denitrification process and equipment for high-nitrogen-content organic wastewater

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Effect test

Embodiment 1

[0038] A deep denitrification process for high-nitrogen organic wastewater, comprising the following steps: chemical precipitation, zeolite filtration, electrodialysis reaction, and post-treatment.

[0039](1) Chemical precipitation: the chemical precipitation, with MgCl 2 h 22 o 14 、CH 3 COO(NH 4 ) 2 and Na 3 PO 4 ﹒ 12H 2 O is a precipitant, according to the molar ratio Mg 2+ : NH 4 + :PO 4 3- Add a precipitating agent at a ratio of 0.8:1:1, then add 6g sodium bicarbonate and 3g sodium hydroxide solution to the filtrate to adjust the pH value, use a turbine stirrer to stir for 15min, then let it stand for 30min, and the stirring speed is 70- 80RPM;

[0040] After standing still, filter the precipitate through a 300-400 mesh filter, and filter the filtered filtrate with zeolite.

[0041] (2) Zeolite filtration: for the zeolite filtration, first, the natural zeolite is beneficiated, crushed, screened, and roasted, then mixed with kaolin, polyvinylamine, and water...

Embodiment 2

[0049] A deep denitrification process for high-nitrogen organic wastewater, comprising the following steps: chemical precipitation, zeolite filtration, electrodialysis reaction, and post-treatment.

[0050] (2) Chemical precipitation: the chemical precipitation, with MgCl 2 h 22 o 14 、CH 3 COO(NH 4 ) 2 and Na 3 PO 4 ﹒ 12H 2 O is a precipitant, according to the molar ratio Mg 2+ : NH 4 + :PO 4 3- Add a precipitant at a ratio of 0.9:1:1, then add 6.5g sodium bicarbonate and 3.2g sodium hydroxide solution to the filtrate to adjust the pH value, use a turbine stirrer to stir for 15min, and then let it stand for 30min. The stirring speed is 75-85RPM;

[0051] After standing still, filter the precipitate through a 300-400 mesh filter, and filter the filtered filtrate with zeolite.

[0052] (2) Zeolite filtration: for the zeolite filtration, first, the natural zeolite is beneficiated, crushed, screened, and roasted, then mixed with kaolin, polyvinylamine, and water at ...

Embodiment 3

[0059] A deep denitrification process for high-nitrogen organic wastewater, comprising the following steps: chemical precipitation, zeolite filtration, electrodialysis reaction, and post-treatment.

[0060] (4) Chemical precipitation: the chemical precipitation, with MgCl 2 h 22 o 14 、CH 3 COO(NH 4 ) 2 and Na 3 PO 4 ﹒ 12H 2 O is a precipitant, according to the molar ratio Mg 2+ : NH 4 + : PO 4 3- Add a precipitant at a ratio of 1:1:1, then add 7g of sodium bicarbonate and 3.5g of sodium hydroxide solution to the filtrate to adjust the pH value, use a turbine stirrer to stir for 15min, then let it stand for 30min, and the stirring speed is 80 -90RPM;

[0061] After standing still, filter the precipitate through a 300-400 mesh filter, and filter the filtered filtrate with zeolite.

[0062] (2) Zeolite filtration: for the zeolite filtration, first, the natural zeolite is beneficiated, crushed, screened, and roasted, then mixed with kaolin, polyvinylamine, and water...

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Abstract

The invention provides a deep denitrification process for high-nitrogen-content organic wastewater. The deep denitrification process comprises the following steps: chemical precipitation, zeolite filtration, electrodialysis reaction and aftertreatment. The process has the beneficial effects that the removal rate of ammonia nitrogen, organic nitrogen and nitrate nitrogen in the wastewater can reach99.9%; the water consumption and the water yield of the concentrated water are reduced by 50% compared with those of the existing electrodialysis sewage treatment technology; as for high-nitrogen-content sewage, the removal rate of COD can reach 99.8%, the removal rate of SS can reach 99.6%, and the removal rate of TS can reach 99.9%. The automation degree is high, operation is simple and convenient; the treatment process is safe and environment-friendly, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a deep denitrification process and equipment for high-nitrogen-containing organic wastewater. Background technique [0002] With the acceleration of urbanization in our country, urban water shortage is becoming more and more serious. The shortage of water resources is the main factor restricting the economic and social development of our country. Reservoirs, etc., the pollution of the environment is becoming more and more serious. Water pollution reduces the use function of water bodies and makes the contradiction between supply and demand of water resources more acute. The recycling of urban domestic sewage is one of the main ways to increase revenue and reduce expenditure, reduce the degree of water pollution, and solve the problem of urban water shortage. Removing nitrogen in water is one of the key points and difficulties in the research of water pollution preventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/16C02F101/38
CPCC02F1/001C02F1/32C02F1/4693C02F1/586C02F1/66C02F9/00C02F2101/16C02F2101/163C02F2101/38C02F2303/04
Inventor 严希海刘木林严谨
Owner ANJIEYU BEIJING OILFIELD TECHNICAL SERVICES CO LTD
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