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A deep nitrogen and phosphorus removal process

A technology of deep denitrification and process, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, oxidized water/sewage treatment, etc., can solve the problem of increased operating costs and management difficulties, and is not suitable for large-scale industrial applications To achieve stable denitrification and dephosphorization effects, improve biodegradability, and occupy a small area

Active Publication Date: 2017-04-12
SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process is only suitable for secondary biochemical effluent with low turbidity SS<50 mg / L and low organic matter concentration, and additional carbon sources are required during the denitrification process, which increases operating costs and management difficulties , not suitable for large-scale industrial applications

Method used

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  • A deep nitrogen and phosphorus removal process
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  • A deep nitrogen and phosphorus removal process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The treatment method of the present invention is used to conduct an advanced treatment test on the secondary biochemical effluent of a domestic urban sewage treatment plant. The water quality of the urban sewage treatment plant after secondary biochemical treatment is as follows: biochemical effluent COD 80-120 mg / L, pH 7.2-7.5, ammonia nitrogen 10-25 mg / L, total nitrogen 35-48 mg / L, chroma 175~200 degrees, BOD 5 0~5mg / L, total phosphorus 1~5mg / L.

[0024] Adopt the method of the present invention, carry out combination treatment test to above-mentioned waste water. Wastewater treatment scale is 1m 3 / h, the main test device configuration, operating conditions and treatment effects of each treatment unit are shown in Table 1. After being treated by the method of the present invention, the effluent index can meet the water quality requirements of industrial reuse water, that is, COD ≤ 35 mg / L, ammonia nitrogen ≤ 1 mg / L, total nitrogen ≤ 10 mg / L, and total phosphorus ...

Embodiment 2

[0028] The treatment device of Example 1 was used to treat the same sewage as in Example 1, and the wastewater treatment effects obtained by changing the operating conditions of each treatment unit are shown in Table 2.

[0029] Table 2 Main processing unit composition and processing effect of embodiment 2

[0030]

Embodiment 3

[0032] The treatment device of Example 1 was used to treat the same sewage as in Example 1, and the wastewater treatment effects obtained by changing the operating conditions of each treatment unit are shown in Table 3.

[0033]Table 3 Main processing unit composition and processing effect of embodiment 3

[0034]

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PUM

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Abstract

The invention discloses an advanced nitrogen and phosphorus removal technology. The technology includes the following steps: (1) biochemical treatment effluent from a municipal sewage treatment plant enters an ozone oxidation reactor and undergoes an ozone oxidation reaction under the action of an ozone oxidizer; and (2) ozone oxidation treated effluent obtained in step (1) is sent to a tubular membrane bioreactor divided into a water inlet zone, an aerobic zone and a facultative zone along a sewage flow direction, and undergoes biological nitrogen and phosphorus removal treatment, the water inlet zone is provided with an ozone filter layer to decompose ozone, the aerobic zone is used to realize phosphorus removal treatment, the facultative zone is used to realize nitrogen removal treatment, effluent goes through a sedimentation tank and then is discharged, and parts of sludge returns to the tubular membrane bioreactor. The method has the characteristics of short flow, and stable nitrogen phosphorus removal effect, and the effluent finally obtained in the invention can meet the standards of industrial reuse water.

Description

technical field [0001] The invention relates to a deep nitrogen and phosphorus removal process, which is especially suitable for the deep nitrogen and phosphorus removal of urban sewage secondary biochemical effluent. Background technique [0002] Urban sewage is one of the main sources of inorganic pollutants such as nitrogen and phosphorus. When these biological nutrients are discharged into the receiving water body, they will cause abnormal growth of algae and other aquatic plants, consume dissolved oxygen in the water, and make the water black and smelly. , causing eutrophication of water bodies, has become one of the most concerned environmental issues in various countries today. [0003] Urban sewage is a potential water resource with stable water quantity and reliable supply. Water reuse in urban sewage is one of the effective ways to alleviate the shortage of urban water resources. At present, most municipal sewage treatment plants adopt the traditional activated sl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/78
Inventor 张蕾李宝忠郭宏山马和旭朱卫
Owner SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD