Down-flow ozone biological aerated filter device and wastewater treatment method

An aerated biological filter and ozone aeration technology, applied in the field of advanced sewage treatment, can solve the problems of large floor space, loose reactor structure, increased investment cost, etc., to reduce floor space, overcome adverse effects, save money The effect of running costs

Inactive Publication Date: 2015-12-23
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current operation mode of the ozone aerated biological filter, the ozone oxidation effluent needs to be aerated to blow off the residual ozone first, and then enter

Method used

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  • Down-flow ozone biological aerated filter device and wastewater treatment method
  • Down-flow ozone biological aerated filter device and wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] A downflow type ozone-aerated biological filter device, including:

[0037] The sealed tower includes an ozone catalytic oxidation zone 5, a biological aerated filter zone 9 and a water outlet zone 10 connected from top to bottom; a water outlet 7 is provided at the lower part of the water outlet zone 10; in the ozone catalytic oxidation zone 5 The upper part is provided with a water distribution pipe 4, the lower part is provided with an ozone aeration pan 17; the lower part of the water outlet area 10 is provided with an aeration pipe 18;

[0038] Water tank 1, connected with water distribution pipe 4 through the water inlet pipe;

[0039] The ozone generator 16 is connected to the ozone aeration pan 17 through an ozone delivery pipe;

[0040] The air supply device 15 is connected to the aeration pipe 18 through an air delivery pipe.

[0041] The downflow type ozone aeration biological filter device of the present invention also includes an ozone destroyer 13...

Example Embodiment

[0043] Example 2

[0044] The method for treating petrochemical wastewater using the downflow ozone biological aerated filter device in Example 1 includes the following steps: the wastewater to be treated in the water tank 1 enters the water distribution pipe 4 on the upper part of the sealed tower through the water inlet pump 2, and Entering the ozone catalytic oxidation zone 5, it is in reverse contact with the ozone entering at the bottom of the ozone catalytic oxidation zone 5. The wastewater flows downwards under the action of gravity into the biological aerated filter zone 9, and the treated effluent is collected from the bottom outlet zone 10, The water outlet area 10 undergoes aeration treatment and is discharged from the water outlet 7 after treatment; at the same time, the ozone destroyer 13 destroys excess ozone. The wastewater to be treated is the secondary effluent after biological treatment of petrochemical wastewater, and the COD is not higher than 100mg / L .

[0045...

Example Embodiment

[0047] Example 3

[0048] Such as figure 2 As shown, the secondary effluent of a comprehensive sewage treatment plant in a large petrochemical industrial park has a COD of less than 100mg / L, an average of 83.5mg / L, BOD 5 / COD is less than 0.1, the biodegradability is very poor, and the effluent cannot meet the new standard. In order to further improve the effluent quality, the method of the present invention is used for treatment. The volume ratio of the integrated tower ozone unit and the biological aeration filter unit is 1:3, total empty tower residence time is 4h, ozone dosage is 10mg / L, catalyst is loaded Al 2 O 3 The solid particle catalyst has a filling rate of 75%, a biological aerated filter gas-water ratio of 3:1, and a filler of ceramsite with a diameter of 3-5mm. The average COD of the effluent after treatment is 49.5mg / L, which can meet the requirements of the new standard.

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Abstract

The invention discloses a down-flow ozone biological aerated filter device. The device comprises a sealing tower, and the sealing tower comprises a catalytic ozonation region (5), a biological aerated filter region (9) and a water outlet region (10) from top to bottom in a sequential connection mode. A water outlet (7) is formed in the lower portion of the water outlet region (10), a water distribution pipe (4) is arranged on the upper portion of the catalytic ozonation region (5), and an ozone aeration disc (17) is arranged on the lower portion of the catalytic ozonation region (5). An aeration pipe (18) is arranged on the lower portion of the water outlet region (10). The invention further discloses a treatment method adopting the down-flow ozone biological aerated filter device for petrifying the wastewater. The technology is compact, composition is reasonable, occupied area can be reduced, the operation cost is lowered, and bad influences on the biological aerated filter of residual ozone in the discharged ozonized water are eliminated.

Description

technical field [0001] The invention relates to the technical field of advanced sewage treatment, in particular to a downflow type ozone aerated biological filter device and a method for treating wastewater by using the device. Background technique [0002] The petrochemical industry is one of the pillar industries of our country. At present, a trend in the development of my country's petrochemical industry is the clustering of parks. According to statistics, by the end of the "Twelfth Five-Year Plan", there were 390 petrochemical industrial parks above the provincial level in my country. For large-scale petrochemical industrial parks, the comprehensive sewage treatment plant is the last barrier to ensure that the petrochemical comprehensive wastewater treatment meets the discharge standards. On April 16, 2015, the Ministry of Environmental Protection promulgated the "Petrochemical Industry Pollutant Discharge Standard" (GB31571-2015) (hereinafter referred to as the new sta...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F1/78
CPCY02W10/10
Inventor 吴昌永周岳溪
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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