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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 the biological aerated filter for treatment, so the structure of the reactor is relatively loose, and the occupied area is also large, increasing the cost of investment

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

Embodiment 1

[0036] A downflow ozone biological aerated filter device, comprising:

[0037] A sealed tower, the sealed tower includes an ozone catalytic oxidation zone 5, a biological aerated filter zone 9, and a water outlet area 10 connected in sequence from top to bottom; a water outlet 7 is provided at the lower part of the water outlet area 10; The upper part is provided with a water distribution pipe 4, and 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] The water tank 1 is connected to the water distribution pipe 4 through the water inlet pipe;

[0039] Ozone generator 16 is connected with ozone aeration pan 17 by ozone delivery pipe;

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

[0041] The downflow ozone biological aerated filter device of the present invention also includes an ozone destroyer 13, which is connected to the ...

Embodiment 2

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

[0045] After the s...

Embodiment 3

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