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Biochemical removal method for total nitrogen in wastewater

A biochemical and wastewater technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems that the concentration of ammonia nitrogen and total nitrogen cannot meet the discharge standard and the treatment effect is not ideal. , to achieve the effect of being conducive to production and application, reducing the floor area, and improving the ability

Inactive Publication Date: 2016-01-06
杭州绿夏环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can treat wastewater to a certain extent, its treatment effect is not ideal, and the concentrations of ammonia nitrogen and total nitrogen in the effluent cannot meet the discharge standards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The waste water to be treated in this embodiment is coal gas waste water, and the method for biochemical removal of total nitrogen from the waste water is as follows:

[0053] (1) In facultative pool (A pool), aerobic pool (O pool) and composite denitrification pool (A pool N 1-4% of the effective pool capacity of each pool and 0.5-2% of activated carbon carrier are added to the pool respectively;

[0054] (2) The coal chemical wastewater to be treated enters the first-level premixed treatment area in the facultative pool (A pool) through the water inlet pipe, and is fully mixed with the return nitrification liquid of the aerobic pool (O pool) and the return sludge of the sedimentation tank. Mixing, the high-concentration organic matter in the wastewater is quickly absorbed by the return sludge, ready for the next step of treatment;

[0055] (3) The wastewater from the first-level premixing treatment area enters the facultative treatment area of ​​the facultative pool ...

Embodiment 2

[0072]The waste water to be treated in this embodiment is coking waste water, and the method for biochemical removal of total nitrogen from waste water is as follows:

[0073] (1) In facultative pool (A pool), aerobic pool (O pool) and composite denitrification pool (A pool N 1-4% of the effective pool capacity of each pool and 0.5-2% of activated carbon carrier are added to the pool respectively;

[0074] (2) The coal chemical wastewater to be treated enters the first-level premixed treatment area in the facultative pool (A pool) through the water inlet pipe, and is fully mixed with the return nitrification liquid of the aerobic pool (O pool) and the return sludge of the sedimentation tank. Mixing, the high-concentration organic matter in the wastewater is quickly absorbed by the return sludge, ready for the next step of treatment;

[0075] (3) The wastewater from the first-level premixing treatment area enters the facultative treatment area of ​​the facultative pool (Pool A...

Embodiment 3

[0093] The waste water to be treated in this embodiment is coal-to-oil, and the method for biochemical removal of total nitrogen from the waste water is as follows:

[0094] (1) In facultative pool (A pool), aerobic pool (O pool) and composite denitrification pool (A pool N 1-4% of the effective pool capacity of each pool and 0.5-2% of activated carbon carrier are added to the pool respectively;

[0095] (2) The coal chemical wastewater to be treated enters the first-level premixed treatment area in the facultative pool (A pool) through the water inlet pipe, and is fully mixed with the return nitrification liquid of the aerobic pool (O pool) and the return sludge of the sedimentation tank. Mixing, the high-concentration organic matter in the wastewater is quickly absorbed by the return sludge, ready for the next step of treatment;

[0096] (3) The wastewater from the first-level premixing treatment area enters the facultative treatment area of ​​the facultative pool (Pool A),...

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Abstract

The invention discloses a biochemical removal method for total nitrogen in wastewater. The method comprises the steps of primary premixing treatment, anoxic treatment, aerobic treatment, composite nitrogen removal treatment and sedimentation treatment, wherein the composite nitrogen removal treatment comprises secondary premixing treatment, nitrogen removal treatment and aeration treatment. The to-be-treated wastewater which can be treated by using the method is raw water and does not need to be diluted through water distribution, and the main water quality indexes of the raw water are as follows: CODcr<=10000mg / L, ammonia nitrogen<=800mg / L, total nitrogen<=1000mg / L, and pH=6-9. Biochemical water treated by using the method has the CODcr removal rate of 92-95%, the ammonia nitrogen removal rate of more than 99% and the total nitrogen removal rate of more than 95%.

Description

technical field [0001] The invention relates to a method for biochemically treating wastewater, more specifically, to a method for biochemically removing total nitrogen from wastewater. Background technique [0002] With the development of industrial and agricultural production, more and more wastewater discharges and types are increasing, and water pollution is becoming more and more serious, especially the eutrophication and algal blooms caused by nitrogen in wastewater are becoming more and more obvious. Therefore, countries have set strict discharge standards for wastewater, especially its nitrogen-containing substances. For example, the "Coking Chemical Industry Pollutant Discharge Standard" GB16171-2012 implemented by my country's coking industry, which limits the emission limits of major pollutants to CODcr: 80mg / L, ammonia nitrogen: 10mg / L, total nitrogen: 20mg / L; coal gas There is no clear discharge standard for the coal-to-oil industry so far, and the enterprises w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 朱春焰
Owner 杭州绿夏环境科技有限公司
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