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An integrated wastewater treatment device and petrochemical secondary effluent treatment method

A wastewater treatment and secondary effluent technology, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the problems of refractory organic matter and low removal efficiency of total nitrogen, and achieve large specific surface area and high speed , the effect of improving the utilization rate

Inactive Publication Date: 2016-11-09
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of low removal efficiency of refractory organic matter and total nitrogen when using a separate BAF process for advanced treatment of industrial wastewater

Method used

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  • An integrated wastewater treatment device and petrochemical secondary effluent treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 As shown, the integrated wastewater treatment device of the present invention includes a reactor, an ozone generator 7, a water tank 1, and a Venturi tube 8; wherein, the reactor includes a denitrification zone 3, an ozone catalytic oxidation zone 4, and an exposure Gas biofilter zone 5, a water inlet 18 is provided at the bottom of the denitrification zone 3, and a water outlet 10 is provided at the top; a first return port 16 and a second return port 17 are provided at the top of the reactor; The water inlet 18 is connected to the water tank 1 through the first pipeline 13, and connected to the first return port 16 through the second pipeline 14;

[0027] Described ozone generator 7 is connected with described Venturi tube 8, and the water inlet of described Venturi tube 8 is connected with described second return port 17 by the 3rd pipeline 15, and the water outlet of described Venturi tube 8 is connected with The lower part of the ozone catalytic oxid...

Embodiment 2

[0032] The method for carrying out petrochemical secondary effluent treatment using the integrated wastewater treatment device of the present invention comprises the following steps:

[0033] The wastewater in the water tank 1 enters the reactor through the water inlet pump 2, passes through the denitrification zone 3, the ozone catalytic oxidation zone 4 and the biological aerated filter zone 5 in turn, and flows out from the water outlet 10. At the same time, there are two return lines, One realizes reflux through the first reflux port 16, the first reflux pump 9 and the second pipeline 14, and the second one reaches the Venturi tube 8 through the second reflux port 17, the second reflux pump 6 and the third pipeline 15, and the reflux The waste water enters the lower part of the ozone catalytic oxidation zone 4 after being mixed with the ozone generated by the ozone generator 7 in the venturi tube 8 to realize reflux.

[0034] Preferably, the reflux of the ozone catalytic o...

Embodiment 3

[0036] In this example, the secondary effluent of a typical petrochemical wastewater is treated as the treatment object. The wastewater quality indicators are as follows: COD is between 60 and 120mg / L, BOD 5 Between 0.95~4mg / L, UV 254 Between 0.6~0.81 / cm, NH 4 + -N concentration is below 2mg / L, TN content is about 20mg / L, pH is between 7-8, SS is between 20-27mg / L, TP is between 1.0-1.5mg / L. The dosage of ozone is 10mg / L, the reflux ratio of the ozone catalytic oxidation unit is 200%, and the reflux ratio of the denitrification unit is 100%. After the above petrochemical wastewater is treated by this process, the effluent index COD is about 50mg / L, NH 4 + - The concentration of N is below 0.5mg / L, and the content of TN is about 15mg / L.

[0037] The fillers used in the denitrification zone and the BAF zone are all volcanic rocks, and the catalytic oxidation fillers used in the ozone catalytic oxidation unit are loaded Al 2 o 3 The catalyst packing, the residence time HRT ...

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Abstract

The invention discloses an integrated wastewater treatment device. The integrated wastewater treatment device comprises an upward flow type reactor, an ozone reactor (7), a water tank (1) and a Venturi tube (8). The reactor sequentially comprises a denitrification region (3), a catalytic ozonation region (4) and a biological aerated filter (5) from bottom to top. A water inlet (18) is formed in the bottom of the denitrification region (3), and a water outlet (10) is formed in the top of the reactor. A first backflow opening (16) and a second backflow opening (17) are formed in the upper portion of the reactor, and the water inlet (18) is connected with the water tank (1) through a first pipeline (13) and connected with the first backflow opening (16) through a second pipeline (14). The invention further discloses a method for treating petrochemical wastewater through the integrated wastewater treatment device. The good organic matter and total nitrogen removal effect is achieved while the petrochemical wastewater is deeply treated.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to an integrated wastewater treatment device and a method for using the device to treat secondary petrochemical effluent. Background technique [0002] The petrochemical industry is a key industry in the national economy, and it is also a high-consumption and high-pollution industry. The amount of wastewater discharged from the petrochemical industry varies with the depth of petroleum refining and processing. The amount of wastewater generated per ton of crude oil refining is about 2.86 tons; the amount of wastewater generated per ton of petrochemical products is 117 tons; the amount of wastewater generated per ton of processing The amount of waste water generated by petroleum and chemical fiber products is 161.8 tons; the amount of waste water generated by each ton of chemical fertilizer products is 4.25 tons. In 2008, enterprises above designated size in my country's petroleum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/78C02F3/10C02F3/28C02F9/00C02F2003/001C02F2101/30C02F2103/365C02F2201/782C02F2209/06C02F2209/08C02F2209/10C02F2209/14C02F2209/16C02F2301/08C02F2305/02
Inventor 周岳溪吴昌永丁岩
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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