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Autotrophic and heterotrophic denitrification synergistic nitrogen and phosphorus removal reaction device and process and application

A technology of heterotrophic denitrification, denitrification and phosphorus removal, applied in the field of sewage treatment, can solve the problems of insufficient carbon source, poor control of carbon source dosage, increased operating cost, etc., and achieves improved utilization and optimal denitrification. Phosphorus removal effect, effect of strengthening denitrification ability

Pending Publication Date: 2020-11-03
SHANDONG PACIFIC ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Eutrophication of water bodies has been a global phenomenon for decades. Although the biochemical treatment of urban sewage treatment plants can reduce most pollutants, the effluent concentrations of total nitrogen and total phosphorus are still high. In order to improve the water environment quality of receiving water bodies, Nitrogen and phosphorus in the secondary effluent urgently need advanced treatment
The inventors found that when the nitrogen removal technology of heterotrophic denitrification is applied to the treatment process with low organic compounding of influent, there will be insufficient carbon source, and the additional addition of organic matter to provide carbon source will cause an increase in operating costs. The dosage is not easy to control

Method used

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  • Autotrophic and heterotrophic denitrification synergistic nitrogen and phosphorus removal reaction device and process and application
  • Autotrophic and heterotrophic denitrification synergistic nitrogen and phosphorus removal reaction device and process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A certain industrial waste water is filled with bluestone layer 12 and supporting layer 4 with an average particle diameter of 8 mm, pyrite with an average particle diameter of 2 mm on the bluestone layer 12, and the volume ratio of bluestone and pyrite is 1:2 (filler layer Accounting for 1 / 4 of the total volume), the influent water first passes through the bluestone layer 12, and then passes through the pyrite layer 11, with a total residence time of 20 hours. The total nitrogen concentration in the influent is 200mg / L, and the total phosphorus concentration in the influent is 40mg / L. Using this process, the total nitrogen in the effluent obtained under the condition of a residence time of 16h is 85mg / L, and the total phosphorus in the effluent is 15mg / L. According to its influent water quality, this process can be used for denitrification and phosphorus removal of PEIC effluent.

[0053] A certain municipal waste water is filled with bluestone layer 12 and supporting ...

Embodiment 2

[0055] A reaction device for autotrophic and heterotrophic denitrification synergistic denitrification and phosphorus removal, comprising: a reaction chamber, in which a sludge reaction zone 9, a pyrite layer 11, and a bluestone layer are sequentially arranged from top to bottom 12. The supporting layer 4, the bottom of the reaction chamber is provided with a water inlet, the upper part of the reaction chamber is provided with a drain, and the top of the reaction chamber is provided with a sealing device.

[0056] The operation mode of the autotrophic and heterotrophic denitrification synergistic nitrogen and phosphorus removal reaction device is as follows:

[0057] Step (1) Reactor filler preparation: take bluestone and mechanically crushed pyrite respectively and add them to the bottom of the reactor in layers;

[0058] Step (2) adding strains: the sludge comes from municipal sewage treatment plants, and the sludge concentration is about 3000mg / L;

[0059] Step (3) adding ...

Embodiment 3

[0061] A reaction device for autotrophic and heterotrophic denitrification synergistic denitrification and phosphorus removal, comprising: a reaction chamber, in which a sludge reaction zone 9, a pyrite layer 11, and a bluestone layer are sequentially arranged from top to bottom 12. The supporting layer 4, the bottom of the reaction chamber is provided with a water inlet, the upper part of the reaction chamber is provided with a drain, and the top of the reaction chamber is provided with a sealing device.

[0062] The bottom of the reaction chamber is provided with a water distributor 3, through which the wastewater can be distributed more evenly and the follow-up treatment efficiency can be improved.

[0063] Operation mode is the same as embodiment 3.

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Abstract

The invention relates to an autotrophic and heterotrophic denitrification synergistic nitrogen and phosphorus removal reaction device and process and application, and belongs to the technical field ofsewage treatment. According to the method, pyrite and bluestone are adopted to reinforce the denitrification process of the wastewater, so that the denitrification and dephosphorization effects of the wastewater are improved. In the method system, pyrite is used as a sulfur source, and blue stone is used as an inorganic carbon source. The iron pyrite enhances the denitrification capacity of denitrifying bacteria and can release iron, ferrous ions and ferric hydroxide coagulant aids generated by autotrophic denitrification, so that precipitates are formed by the pyrite and phosphate radicals,and the effect of enhanced phosphorus removal is achieved. The method is obvious in effect, low in cost and suitable for engineering application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a method for denitrifying and dephosphorizing sewage, in particular to a sewage treatment method for synchronously removing total nitrogen and phosphate in water by using bluestone and pyrite. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Eutrophication of water bodies has been a global phenomenon for decades. Although the biochemical treatment of urban sewage treatment plants can reduce most pollutants, the effluent concentrations of total nitrogen and total phosphorus are still high. In order to improve the water environment quality of receiving water bodies, Nitrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/10C02F101/16C02F101/38
CPCC02F3/2866C02F2101/105C02F2101/16C02F2101/38C02F2203/006
Inventor 刘帅孙迎超张军张优强朱杰高
Owner SHANDONG PACIFIC ENVIRONMENTAL PROTECTION
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