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Bio-dopp sewage denitrification system and sewage denitrification method

A treatment system and biological multiplication technology, applied in the direction of biological water/sewage treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problem of insufficient technology, many carbon sources, and inability to fully utilize carbon sources, etc. problem, to achieve the effect of simple process

Active Publication Date: 2014-08-27
BDP ENVIRO TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned method disclosed in the prior art cannot fully utilize the carbon source in the raw water in realizing the emission requirements of denitrification treatment, so that more carbon sources need to be supplemented; The emission standard for total nitrogen is also constantly improving. For example, the United States will implement the TN5mg / l emission standard in 2020. The existing treatment technology cannot meet the requirements of this emission standard.

Method used

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  • Bio-dopp sewage denitrification system and sewage denitrification method
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  • Bio-dopp sewage denitrification system and sewage denitrification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] use figure 1 The sewage treatment system with the shown structure treats municipal sewage, in which the concentration of dissolved oxygen is 0.2mg / L, the concentration of sludge is 8g / L, and the velocity of lateral flow of water body is 0.1m / s. The results are shown in Table 1. Table 1 is the indicators before and after municipal sewage treatment in Example 1 of the present invention.

[0074] Index before and after municipal sewage treatment in the embodiment of the present invention 1 in table 1

[0075] project

[0076] It can be seen from Table 1 that after the municipal sewage is treated by the sewage treatment system provided by this application, the total nitrogen index meets the discharge control standard.

Embodiment 2

[0078] use figure 1 The sewage treatment system with the structure shown in the figure treats industrial park sewage, controlling the concentration of dissolved oxygen to 0.2mg / L, the concentration of sludge to 8g / L, and the velocity of lateral flow of water to 0.2m / s. The results are shown in Table 2 , Table 2 is the index before and after industrial park sewage treatment in Example 2 of the present invention.

[0079] Index before and after industrial park sewage treatment in the embodiment of the present invention 2 in table 2

[0080] project

[0081] It can be seen from Table 2 that after the industrial park sewage is treated by the sewage treatment system provided by this application, the total nitrogen index meets the discharge control standard.

Embodiment 3

[0083] use figure 1 The sewage treatment system with the structure shown in the figure treats acrylonitrile sewage, controls the concentration of dissolved oxygen to 0.2 mg / L, the concentration of sludge to 8 g / L, and the speed of lateral flow of water to 0.2 m / s. The results are shown in Table 3 , Table 3 is the index before and after the treatment of acrylonitrile sewage in Example 3 of the present invention.

[0084] Index before and after acrylonitrile sewage treatment in the embodiment of the present invention 3 in table 3

[0085] project

[0086] It can be seen from Table 3 that after the acrylonitrile sewage is treated by the sewage treatment system provided by the present application, its total nitrogen index meets the emission control standard.

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Abstract

The invention provides a bio-dopp sewage denitrification system. According to the bio-dopp sewage denitrification system, sewage to be treated enters the sewage denitrification system after flowing through a water inlet area, then flows through a first air power area, a circulating area, a second air power area and a rapid sediment area in sequence and finally is discharged out of the rapid sediment area; sludge in the rapid sediment area flows back into the circulating area through a backflow buffering area, and sludge exchanging is conducted between the circulating area and a bio-dopp pool through a sewage exchanging pipeline. According to the bio-dopp sewage denitrification system, due to the fact that sludge exchanging is conducted between the circulating area and the bio-dopp pool, organic matter in water can be used to the maximum extent for denitrification; air is introduced into water, part of ammonia nitrogen in sewage can be oxidized into nitrite, ammonia nitrogen in sewage can be oxidized through the nitrite, the quantity of demanded denitrification carbon sources is reduced, in this way, the water outlet index for sewage discharging is increased, and the discharge control standard, about to be implemented, of total nitrogen can be met.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a biological multiplication sewage denitrification treatment system and a sewage denitrification treatment method. Background technique [0002] Total nitrogen (abbreviated as TN) refers to the total amount of various forms of inorganic and organic nitrogen in water, including NO 3 - , NO 2 - and NH 4 + Such as inorganic nitrogen and organic nitrogen such as protein, amino acid and organic amine, calculated in milligrams of nitrogen per liter of water. It is often used to indicate the degree of water pollution by nutrients. When the nitrogen and phosphorus substances in the surface water exceed the standard, the microorganisms will multiply, the plankton will grow vigorously, and the state of eutrophication will appear. [0003] Regarding the discharge of industrial wastewater, our country has also set different standards for different industries. For example, in ...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 李建国
Owner BDP ENVIRO TECH LTD