Method for treating sewage by using biological denitrification technology

A technical treatment and biological denitrification technology, applied in the field of sewage treatment, can solve the problems of water eutrophication, long process flow, water quality deterioration, etc., and achieve the effect of accelerated conversion efficiency, high treatment efficiency and low treatment cost

Active Publication Date: 2018-04-06
DALI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the final outlets of domestic sewage are rivers or lakes, and N element is one of the main plant nutrients. The high content of N in domestic sewage belongs to the super-eutrophic type, which is not conducive to maintaining and improving the urban water environment, and is likely to cause water pollution. The deterioration of water quality and the occurrence of eutrophication in water bodies. For this reason, many cities have upgraded and built biological denitrification advanced treatment facilities to reduce the N content in the effluent. The current biological denitrification facilities require high engineering investment and technical The process is lengthy, the area is large, and the management is complicated

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  • Method for treating sewage by using biological denitrification technology

Examples

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Effect test

Embodiment 1

[0025] A method for treating sewage using biological denitrification technology, comprising the following steps:

[0026] (1) Pretreatment: Sewage is imported into the sedimentation tank, and after settling for 20 hours, the upper layer liquid is extracted and filtered through No. 1 round hole filter screen and No. 2 round hole filter screen successively, and the aperture of the No. 1 round hole filter screen is 1 mm. The hole diameter of the No. 2 round hole filter is 0.05mm;

[0027] (2) Import the filtered sewage into the ammoniation tank and perform an aeration treatment. The aeration treatment time is 8 hours. After the aeration treatment, the dissolved oxygen concentration in the sewage is greater than 4mg / L. After the aeration, add lime powder Adjust the pH of the sewage to 7, add the ammonifying bacteria mixed bacteria solution to the ammoniation tank to ammonify the sewage, and the ammoniated bacteria mixed bacteria solution is adsorbed on the activated carbon and chi...

Embodiment 2

[0030] A method for treating sewage using biological denitrification technology, comprising the following steps:

[0031] (1) Pretreatment: Sewage is imported into the sedimentation tank, and after settling for 12 hours, the upper layer liquid is extracted and filtered through No. 1 round hole filter screen and No. 2 round hole filter screen successively. The aperture of the No. 1 round hole filter screen is 1mm, and the The hole diameter of the No. 2 round hole filter is 0.05mm;

[0032] (2) Import the filtered sewage into the ammoniation tank and perform an aeration treatment. The aeration treatment time is 5 hours. After the aeration treatment, the dissolved oxygen concentration in the sewage is greater than 4mg / L. After the aeration, add lime powder Adjust the pH of the sewage to 7, add the ammonifying bacteria mixed bacteria solution to the ammoniation tank to ammonify the sewage, and the ammoniated bacteria mixed bacteria solution is adsorbed on the activated carbon and ...

Embodiment 3

[0035] A method for treating sewage using biological denitrification technology, comprising the following steps:

[0036] (1) Pretreatment: Sewage is imported into the sedimentation tank, and after settling for 24 hours, the upper layer liquid is extracted and filtered through No. 1 round hole filter screen and No. 2 round hole filter screen successively. The aperture of the No. 1 round hole filter screen is 1 mm. The hole diameter of the No. 2 round hole filter is 0.05mm;

[0037] (2) Import the filtered sewage into the ammoniation tank and perform an aeration treatment. The aeration treatment time is 10 hours. After the aeration treatment, the dissolved oxygen concentration in the sewage is greater than 4mg / L. After the aeration, add lime powder Adjust the pH of the sewage to 7, add the ammonifying bacteria mixed bacteria solution to the ammoniation tank to ammonify the sewage, and the ammoniated bacteria mixed bacteria solution is adsorbed on the activated carbon and chitos...

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Abstract

The invention provides a method for treating sewage by using a biological denitrification technology, and relates to the technical field of sewage treatment. The method includes the following steps of: introducing the sewage into a sedimentation tank, and sucking upper-layer liquid after the sedimentation so as to make the sucked liquid pass through a No.1 round-hole filter net and a No.2 round-hole filter net for filtration sequentially; introducing the filtered sewage into an ammoniation tank for first aeration treatment, adjusting the pH value of the aerated sewage to 7, and adding ammoniated bacteria mixed bacterial liquid into the ammoniation tank so as to perform ammoniation on the obtained sewage; performing second aeration treatment, introducing the obtained sewage into a fluidizedbed reactor which includes a nitration mud-containing nitration chamber and a denitrification mud-containing denitrification chamber which are connected in series, performing nitration treatment, denitrification treatment and filtration successively, and discharging the treated sewage. The method for treating the sewage by using the biological denitrification technology has the advantages of easyoperation, low processing cost, high processing efficiency and a good effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating sewage by using biological denitrification technology. Background technique [0002] Most of the final outlets of domestic sewage are rivers or lakes, and N element is one of the main plant nutrients. The high content of N in domestic sewage belongs to the super-eutrophic type, which is not conducive to maintaining and improving the urban water environment, and is likely to cause water pollution. The deterioration of water quality and the occurrence of eutrophication in water bodies. For this reason, many cities have upgraded and built biological denitrification advanced treatment facilities to reduce the N content in the effluent. The current biological denitrification facilities require high engineering investment and technical The process is lengthy, the area is large, and the management is complicated. Improving the denitrification process of d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/38
CPCC02F1/001C02F3/302C02F3/34C02F9/00C02F2101/38
Inventor 刘卫红杨建芳宋艳秋黄毕生张成桂高鹏飞周俊
Owner DALI UNIV
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