Industrial wastewater advanced total nitrogen removal treatment process and denitrification device thereof

A technology for industrial wastewater and nitrogen treatment, applied in the direction of aerobic process treatment, special compound water treatment, biological water/sewage treatment, etc., can solve the problem that it is difficult to meet the advanced treatment requirements, the removal of total nitrogen is not considered, and the discharge standard cannot be met and other problems, to achieve the effect of improving the total nitrogen removal effect, high degree of automation, and reducing the addition of carbon sources

Pending Publication Date: 2021-05-07
BEIJING CAS SHENGTAI ENVIRONMENTAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the country pays more and more attention to environmental pollution control and energy conservation and emission reduction, more attention is paid to the total nitrogen index, and many areas list it as a real-time monitoring item for effluent discharge. The content is high, which cannot meet the increasingly stringent requirements of discharge standards, especially in the field of industrial wastewater treatment. Many factories have not considered the issue of total nitrogen removal before.
[0003] The use of biological nitrification and denitrification treatment is the most effective and economical method for total nitrogen removal, but the traditional biochemical contact oxidation reaction process has limited effect on total nitrogen removal, and it is difficult to meet the advanced treatment requirements. Some municipal sewage plants use biological filters However, there are still many problems in using this method in industrial wastewater, such as the concentration of pollutants is too high, the removal effect is limited, and the filter is easy to block, etc.

Method used

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  • Industrial wastewater advanced total nitrogen removal treatment process and denitrification device thereof
  • Industrial wastewater advanced total nitrogen removal treatment process and denitrification device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: refer to figure 1 , the present invention provides a kind of deep total nitrogen removal treatment process of industrial wastewater, comprising the following steps:

[0044] 1) The industrial wastewater enters the pre-denitrification contact tank 3 after passing through the mixer 2. The top of the pre-denitrification contact tank 3 is provided with bamboo silk filler. The pool needs to distribute water evenly, and at the same time, a curtain-type biological composite filler is installed inside the pool.

[0045] In step 1), when the organic content of industrial wastewater and the concentration of nitrate nitrogen are high, the concentration of nitrate nitrogen is greater than 50mg / L, if the ratio of BOD5 (biochemical oxygen demand five days) to TN (total nitrogen content) is greater than 4 , it can be considered that the composition of incoming water is suitable for the growth of denitrifying bacteria. No carbon source is added to the pre-denitrification ...

Embodiment 2

[0057] Embodiment 2: refer to figure 1 , the present invention provides a kind of deep total nitrogen removal treatment process of industrial wastewater, comprising the following steps:

[0058] 1) Industrial wastewater enters the pre-denitrification contact tank after passing through the mixer. Bamboo silk filler is arranged on the top of the pre-denitrification contact tank, and the water needs to be evenly distributed in the pool. Removal of total nitrogen to obtain pre-reaction effluent. The adaptation environment of the pre-denitrification tank in step 1) is pH=7, total nitrogen is 124 mg / L, and the residence time is 5 hours.

[0059] In step 1), when the organic content of industrial wastewater and the concentration of nitrate nitrogen are high, the concentration of nitrate nitrogen is greater than 50 mg / L, and if the ratio of BOD5 to TN is greater than 4, it can be considered that the composition of incoming water is suitable for the growth of denitrifying bacteria , ...

Embodiment 3

[0070] Embodiment 3: refer to figure 1 , the present invention provides a kind of deep total nitrogen removal treatment process of industrial wastewater, comprising the following steps:

[0071] 1) The industrial wastewater enters the pre-denitrification contact pool after passing through the mixer. The pool needs to distribute water evenly. At the same time, a suspended biological composite filler is installed inside the pool. The industrial wastewater undergoes a preliminary total nitrogen removal reaction to obtain pre-reaction effluent. In step 1), the adaptation environment of the pre-denitrification tank is pH 9, the total nitrogen is 151 mg / L, and the residence time is 6 hours.

[0072] 2) The pre-reaction effluent in step 1) enters the carbon oxidation and nitrification filter tank, the tank is equipped with an aeration device, and the filter tank is provided with a biological ceramsite filler layer, and microbial flora is attached to the biological ceramsite filler la...

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Abstract

The invention relates to an industrial wastewater advanced total nitrogen removal treatment process, which comprises the following steps: 1) industrial wastewater enters a pre-denitrification contact tank after passing through a mixer, water needs to be uniformly distributed in the tank, and meanwhile, a combined filler is arranged in the tank; (2) the wastewater in the step (1) enters a carbon oxidation nitration filter tank, an aeration device is arranged in the carbon oxidation nitration filter tank, and a biological ceramsite filler layer is arranged in the carbon oxidation nitration filter tank; (3) a backflow proportion is selected according to reaction effluent in the step (2), the wastewater flows back to the step (1) and is mixed with industrial wastewater for primary total nitrogen removal, and residual wastewater enters a rear denitrification filter tank; 4) a biological ceramsite filler layer is arranged in the rear denitrification filter tank, and an external carbon source is added; (5) the effluent in the step (4) enters a filter tank; and (6) effluent in the step (5) enters a catalytic ozonation pond, and selective starting is conducted. The invention also relates to a denitrification device for the treatment process, and the problem of deep denitrification in industrial wastewater can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to an industrial wastewater deep total nitrogen removal process and a nitrogen removal device thereof. Background technique [0002] As the country pays more and more attention to environmental pollution control and energy conservation and emission reduction, more attention is paid to the total nitrogen index, and many areas list it as a real-time monitoring item for effluent discharge. The high content of nitrogen cannot meet the increasingly stringent requirements of discharge standards, especially in the field of industrial wastewater treatment. Many factories have not considered the issue of total nitrogen removal before. [0003] The use of biological nitrification and denitrification treatment is the most effective and economical method for total nitrogen removal, but the traditional biochemical contact oxidation reaction process has limited effect on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F3/02C02F3/28C02F3/302C02F1/001C02F1/78C02F2305/02
Inventor 杨志超王军强于丰浩徐东刁振东王项晗巴雨
Owner BEIJING CAS SHENGTAI ENVIRONMENTAL TECH
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