A coupled wastewater treatment device and a treatment method for petrochemical secondary effluent

A wastewater treatment and secondary effluent technology, which is applied in special compound water treatment, natural water treatment, water/sewage treatment, etc., can solve the problems of poor treatment effect and low phosphorus removal effect of biological aerated filter, and achieve reduction The effect of operating cost, reducing dosage and improving removal rate

Active Publication Date: 2019-04-23
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the biological aerated filter usually only removes biodegradable organic matter in wastewater, the treatment effect of this process alone on wastewater containing soluble and refractory organic matter is often not good, and the phosphorus removal effect of the biological aerated filter is relatively low. low, so it is necessary to strengthen the phosphorus removal performance of the biological aerated filter

Method used

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  • A coupled wastewater treatment device and a treatment method for petrochemical secondary effluent
  • A coupled wastewater treatment device and a treatment method for petrochemical secondary effluent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a coupled wastewater treatment device includes a biological aerated filter 7 and an ozone catalytic oxidation tower 14, the biological aerated filter 7 is a downward flow type, and the first water intake area is sequentially from top to bottom 21. The first filling area 22, the first water outlet area 23, the first aeration pan 24 is arranged at the lower part of the first water outlet area 23, and the first aeration pan 24 is arranged at the lower part of the biological aerated filter 7. The first water outlet 25 that a water outlet area 23 links to each other; Described ozone catalytic oxidation tower 14 is a sealed tower, is successively from top to bottom the second water inlet area 26, the second packing area 27 and the second water outlet area 28, in the The bottom of the second water outlet area 28 is provided with a second aeration pan 29, and the top of the ozone catalytic oxidation tower 14 is provided with a second water inlet 30 co...

Embodiment 2

[0038] The COD of the secondary effluent of a comprehensive sewage treatment plant in a large petrochemical industrial park is between 70-90mg / L, with an average of 74.5mg / L. 4 The dosage is 9mg / L, the biological aerated filter is filled with ceramsite, the filling rate is 70%, the air-water ratio is 3:1, the empty tower hydraulic retention time is 3h, the ozone dosage is 10mg / L, and the contact oxidation Time 1h. At the same time, a comparative test was carried out, and FeSO was not added to the wastewater entering the biological aerated filter. 4 , and the other parameters are the same. Such as figure 2 As shown, the results show that due to the addition of FeSO at the front end of the biological aerated filter 4 Due to the coupling catalysis formed, the average COD of the final effluent is 39.9 mg / L, while the average COD of the effluent without using the comparison device of the present invention is 50.6 mg / L. It can be seen that using the device and operating paramet...

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Abstract

The invention discloses a coupled type waste water treatment device which comprises a biological aerated filter (7) and a catalytic ozonation tower (14) .The biological aerated filter (7) is in a downward flow mode, and sequentially comprises a first water inlet area (21), a first filler area (22) and a first water outlet area (23) from top to bottom .The catalytic ozonation tower (14) is a sealed tower, and sequentially comprises a second water inlet area (26), a second filler area (27) and a second water outlet area (28) from top to bottom .The sewage deep treatment technology is provided aiming at the urgent technical demand of petrochemical sewage plants in China for upgrading and reconstruction, phosphorus and organic matter can be removed at the same time, and the two units can be coupled.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a coupled wastewater treatment device and a petrochemical secondary effluent treatment method using the device. Background technique [0002] In 2015, the Ministry of Environmental Protection promulgated the "Petrochemical Industry Pollutant Discharge Standard" (GB 31571-2015), which put forward higher requirements for the secondary effluent water quality of direct discharge petrochemical sewage plants, and the effluent COD was changed from the original standard of 100mg / L Increase to 60mg / L. In areas where the development density of the land is already high and the environmental carrying capacity begins to weaken, or the water environment capacity is small, the ecological environment is fragile, and serious water pollution problems are prone to occur and special protection measures are required, the implementation of low COD At 50mg / L, TP is lower than the standard of 0.5mg / L...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/78C02F3/06C02F3/10
CPCC02F1/78C02F3/06C02F3/10C02F9/00C02F2103/365C02F2201/784C02F2305/023Y02W10/10
Inventor 吴昌永周岳溪郭明昆
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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