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Biochemical treatment/advanced oxidation treatment coupled sewage treatment technique

An advanced oxidation and sewage treatment technology, applied in the field of water treatment, can solve the problems of large interference factors, insignificant advantages of advanced oxidation process, increased investment and operational complexity, etc.

Inactive Publication Date: 2012-05-16
MEISHU ENVIRONMENTAL PROTECTION TECH BEIJING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the CB process, the advanced oxidation is subject to large interference factors and is limited due to the need for strict pretreatment; in the BC process, the advanced oxidation is placed in the biochemical post-stage, and the refractory macromolecules are oxidized to short chains to form small molecules. In the process of further mineralization and degradation, the advantages of the advanced oxidation process are not obvious, and the COD cannot be further reduced Cr ;The BCB process adds a biochemical section after the BC process section to further remove COD through biochemical degradation Cr , additional structures and reactors are required, which increases the complexity of investment and operation

Method used

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  • Biochemical treatment/advanced oxidation treatment coupled sewage treatment technique
  • Biochemical treatment/advanced oxidation treatment coupled sewage treatment technique
  • Biochemical treatment/advanced oxidation treatment coupled sewage treatment technique

Examples

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Embodiment 1

[0010] A fine chemical company mainly produces various paper-making additives and dyeing and finishing auxiliaries, and paper-making additives account for more than 90% of the company's production capacity. The company uses "coagulation sedimentation-A 2 / O" process to treat production wastewater, although the residence time of wastewater in the biochemical system pool is as long as 6 days, the effluent COD Cr It is still unable to meet the requirement of 500mg / L.

[0011] By analyzing the information provided by the company, it was found that the paper-making additives it produces are all high molecular polymers. Due to the inevitable problem of incomplete polymerization during the polymerization reaction, a small amount of polymers with relatively low molecular weights will be produced, and these polymers with relatively low molecular weights will all enter the wastewater. Polymers with relatively low molecular weight can neither be removed by coagulation precipitation nor...

Embodiment 2

[0014] A large petrochemical company mainly produces butadiene rubber, phenol, acetone and other chemical products. The waste water discharged by the company during the production process is firstly pretreated separately by the workshop level treatment device, and then collected to the adjustment pool of the company's sewage treatment station. The company's total process wastewater discharge is 1579.2m 3 / d, due to the high concentration of organic pollutants in this sewage, a UASB upflow anaerobic reactor was installed after coagulation and sedimentation, followed by a contact oxidation process, and the process effluent was diluted with river water before being discharged. The amount of dilution water was about 4133m 3 / d. Although it can produce water COD after dilution Cr Reaching the discharge standard of 100mg / L, but significantly increased wastewater discharge and COD Cr The total emissions are not in line with the energy conservation and emission reduction policies a...

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Abstract

The invention provides a biochemical treatment / advanced oxidation treatment coupled sewage treatment technique which is suitable for treating waste water with high organic pollutant concentration and poor biochemical degradability. The technique comprises steps as follows: sewage is pretreated and enters a biochemical reactor, the silt-water mixture treated by the biochemical reactor enters two sedimentation tanks, the two sedimentation tanks separate the silt-water mixture, most silt flows back to the water inlet end of the biochemical reactor, and the surplus silt goes to a silt concentration tank; most supernatant enters an advanced oxidation treatment unit, and the rest of supernatant is discharged; and the supernatant treated by the advanced oxidation unit flows back to the water inlet end of the biochemical reactor. The invention couples the biochemical treatment and advanced oxidation, fully utilizes the degradation capability of the biochemical technique for micromolecules and the degradation capability of the advanced oxidation technique for macromolecules, organically combines the biochemical technique and the advanced oxidation technique, can efficiently treat nondegradable waste water which can not achieve the standard by biochemical treatment, and is suitable for waste water treatment in chemical engineering, pharmacy, printing and dyeing and other industries.

Description

technical field [0001] The invention provides a sewage treatment process coupled with biochemistry and advanced oxidation, which is suitable for treating waste water with high concentration of organic pollutants and poor biochemical properties, and belongs to the field of water treatment. Background technique [0002] General high-concentration organic wastewater refers to the COD of wastewater Cr (chemical oxygen demand) is greater than 2000mg / L organic wastewater, and refractory organic wastewater refers to wastewater containing organic pollutants that are difficult to biodegrade or have biological toxicity. Refractory organic matter refers to organic matter that cannot be degraded by microorganisms, or cannot be degraded fast enough under any environmental conditions to prevent its accumulation in the environment. When the refractory organic matter is decomposed by microorganisms, the speed is very slow and the decomposition is not complete. This kind of pollutants are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/72C02F3/30
Inventor 陈凯华张雷
Owner MEISHU ENVIRONMENTAL PROTECTION TECH BEIJING
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