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Upflow ozone biological aerated filter device and petrochemical wastewater treatment method

A biological aerated filter and ozone aeration technology, applied in the direction of oxidized water/sewage treatment, sustainable biological treatment, aerobic process treatment, etc., can solve the problems of low treatment capacity, reduced reactivity, low biomass, etc. , to achieve the effect of improving biodegradability

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

When the ozone concentration in water exceeds 0.2mg / L, the microorganisms in the biological aerated filter can be partially inactivated, reducing its reactivity, resulting in low biomass and low processing capacity

Method used

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  • Upflow ozone biological aerated filter device and petrochemical wastewater treatment method
  • Upflow ozone biological aerated filter device and petrochemical wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a kind of upflow ozone biological aerated filter device comprises a sealing tower, a blower 11 and an ozone generator 12; the sealing tower is integrated, the bottom of the sealing tower is provided with a water inlet, and the upper part is provided with a water outlet , the middle is the treatment area, and the treatment area includes the ozone catalytic oxidation area 6, the ozone catalytic decomposition area 5 and the biological aerated filter area 4 from bottom to top.

[0030] The bottom of the ozone catalytic oxidation zone 6 is provided with an ozone aeration pan 14, which is connected to the ozone generator 12 through an ozone delivery pipe, and an aeration tube 13 is arranged at the bottom of the biological aerated filter area 4, and is connected with the ozone generator through an air delivery pipe. Blower 11 is connected.

[0031] The water inlet is connected to the water inlet pipe, and the water inlet pump 1 and the liquid flowme...

Embodiment 2

[0035] Adopt the upflow type ozone biological aerated filter device of the present invention to carry out the treatment method of petrochemical wastewater, comprise the steps:

[0036] The wastewater to be treated is the secondary effluent after biological treatment of petrochemical wastewater, and the COD is not higher than 100mg / L. The wastewater to be treated enters the sealed tower from the bottom, the ozone generator 12 provides ozone, and the blower 11 provides air; after water distribution, it enters the ozone catalytic oxidation zone 6. Ozone oxidation is carried out. After oxidation, the water rises into the ozone catalytic decomposition zone 5, and the catalytic decomposition of residual ozone in the wastewater is completed. The wastewater continues to rise into the biological aerated filter zone 4, and the wastewater is further purified through biological oxidation and adsorption. Treatment The rear outlet water flows out from the upper water outlet 3.

[0037] Clea...

Embodiment 3

[0040] Such as figure 1 with figure 2 As shown, in the secondary effluent of a comprehensive sewage treatment plant in a large petrochemical industrial park, the average effluent COD is 75.7mg / L, 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 to process the ozone catalytic oxidation zone 6, the ozone catalytic decomposition zone 5 and the sealed tower. The volume ratio of biological aerated filter zone 4 is 1:1:2, 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 2:1, and the filler is volcanic rock with a diameter of 3-5mm. The average COD of the effluent after treatment is 45.8mg / L, which can meet the requirements of the new standard.

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Abstract

The invention discloses an upflow ozone biological aerated filter device which comprises an integrated seal tower, an air blower (11) and an ozone generator (12). A water inlet is formed in the bottom of the seal tower, a water outlet (3) is formed in the upper portion of the seal tower, the middle of the seal tower is provided with a treatment area, and the treatment area sequentially comprises an ozone catalytic ozonation area (6), an ozone catalytic decomposition area (5) and a biological aerated filter area (4) from bottom to top. The invention further discloses a petrochemical wastewater treatment method by adopting the upflow ozone biological aerated filter device. According to the upflow ozone biological aerated filter device and the petrochemical wastewater treatment method, the technology is compact, the floor area is small, the treatment efficiency is high, the ozone catalytic decomposition area is filled with manganese sand, and the influence of residual ozone in yielding water of the ozone catalytic ozonation area on the biological aerated filter area can be reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an upflow type ozone aerated biological filter device and a method for treating petrochemical wastewater by using the device. Background technique [0002] Petrochemical wastewater contains a large amount of toxic and refractory organic matter, and its discharge has a greater impact on water bodies. One of the trends in the development of my country's petrochemical industry is the clustering of parks. There are thousands of petrochemical industrial parks of different sizes across the 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 stand...

Claims

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Application Information

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