Sewage biological denitrifying device and process

A sewage biological and treatment equipment technology, applied in the field of biological denitrification, can solve the problems of wasting carbon sources, high oxygen consumption, high mechanical energy consumption, etc., and achieve the effects of reducing carbon sources, improving nitrogen removal efficiency, and reducing economic costs

Inactive Publication Date: 2015-04-29
北京斯凯特达科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of high oxygen consumption, high mechanical energy consumption and excessive waste of carbon sources in the biological denitrification treatment process in the prior art, the purpose of the present invention is to provide a sewage biological denitrification treatment equipment and craft

Method used

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  • Sewage biological denitrifying device and process
  • Sewage biological denitrifying device and process
  • Sewage biological denitrifying device and process

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Example 1, such as figure 1 As shown, a kind of sewage biological denitrification treatment equipment described in the embodiment of the present invention includes a monitoring device and a homogeneous adjustment tank 1 connected in sequence through pipelines, a denitrification system 2, a nitrification tank 3 and a secondary sedimentation tank 4, and the nitrification tank It is connected with the denitrification system through the sewage return pipe 5, and the secondary sedimentation tank is connected with the denitrification system through the sludge return pipe 6. It is characterized in that the homogeneous adjustment tank is connected with the acid-base addition system 7, and the denitrification system includes sequentially connected through pipelines. The first-level denitrification pool 201 and the second-level denitrification pool 202, the second-level denitrification pool is connected to the carbon source addition system 8;

[0042] The monitoring device includ...

Embodiment 2

[0047] Example 2, such as figure 1 As shown, a kind of sewage biological denitrification treatment equipment described in the embodiment of the present invention includes a monitoring device and a homogeneous adjustment tank, a denitrification system, a nitrification tank and a secondary sedimentation tank, a nitrification tank and a denitrification system connected in sequence by pipelines It is connected through the sewage return pipe, the secondary settling tank is connected with the denitrification system through the sludge return pipe, and the homogeneous adjustment tank is connected with the acid-base addition system. The denitrification system includes a first-level denitrification tank and a second-level denitrification tank connected in sequence through pipelines , the carbon source addition system is connected to the secondary denitrification tank;

[0048] The monitoring device includes a PLC controller and a display connected to the PLC controller, and the PLC cont...

Embodiment 3

[0053] Example 3, such as figure 2 As shown, the embodiment of the present invention also provides a sewage biological denitrification treatment process that saves additional carbon sources and energy consumption under the condition of sewage with a low carbon-to-nitrogen ratio. The process includes the following steps:

[0054] The process includes the following steps:

[0055] S101. Water quality adjustment: add acid-base reagents to the sewage to adjust the pH value to 7-8, which is a suitable living environment for microorganisms;

[0056] S102. First-level denitrification treatment: the pH-adjusted sewage and the reflux liquid of the nitrification tank form a mixed solution, and the denitrifying bacteria use the organic carbon source in the sewage to denitrify the nitrate nitrogen in the reflux liquid of the nitrification tank. The dissolved oxygen is controlled at 0.2-0.4mg / l, which can ensure the normal biological activity of most microbial denitrifying bacteria in th...

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Abstract

The invention discloses a sewage biological denitrifying device and process. The device includes a monitoring device as well as a homogeneous adjusting tank, a denitrifying system, a nitrifying pool and a secondary sedimentation tank all connected with one another in sequence through pipelines; the homogeneous adjusting tank is connected with an acid-base adding system; the denitrifying system includes a first-level denitrifying pool and a second-level denitrifying pool, both of which are connected in sequence through pipelines; the second-level denitrifying pool is connected with a silicon source adding system; the monitoring device includes a PLC and a display. The sewage biological denitrifying process includes the following steps: the sewage is mixed with a return fluid after the pH value of the sewage is adjusted, and denitrifying bacteria denitrify the nitrate nitrogen in the return fluid by utilizing organic carbon sources in the sewage; organic carbon sources are added to the mixed liquor, and the denitrifying bacteria use the additionally added organic carbon sources to completely remove the nitrate nitrogen in the mixed liquor; the nitrifying bacteria oxidize the ammonia nitrogen in the mixed liquor into nitrate nitrogen; the mixed liquor partially flows back to be subjected to denitrification treatment; the sludge and water in the mixed liquor are separated through precipitation, and then the clean water is discharged. According to the invention, the silicon sources that are required to be additionally added are not needed, and the economic cost is reduced.

Description

technical field [0001] The invention relates to the technical field of biological denitrification, in particular to a sewage biological denitrification treatment equipment and process. Background technique [0002] There are four forms of nitrogen in urban sewage, namely organic nitrogen, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen. Organic nitrogen in sewage mainly comes from amino acids, peptides and proteins, all of which are products of biological processes. The increase of organic nitrogen indicates serious water pollution. Ammonia nitrogen in sewage is the product of microbial activity. In the process of collecting and transporting sewage, due to the action of microorganisms, organic nitrogen is decomposed into ammonia nitrogen. Ammonia nitrogen refers to the general term of ammonium ion and nitrogen, which exists in the form of ammonium root or nitrogen dissolved gas, as shown in the following formula: [0003] [0004] The amount of ammonia nitrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/302C02F9/00C02F2101/16C02F2101/163C02F2101/166C02F2101/38C02F2301/08
Inventor 赵宏喜罗耀军蔡奎芳徐子涵陆君进李斌
Owner 北京斯凯特达科技开发有限公司
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