Treating system and treating method for hardly degradable organic waste water

A technology for organic wastewater treatment and organic wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high operating costs and failure to reach circulating cooling water or boiler feed water Standard water use, inability to remove the hardness and salt content of refractory organic wastewater, to achieve the effects of prolonging life, excellent effluent quality, and strong impact resistance

Inactive Publication Date: 2012-12-12
BEIJING SOUND ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] From the above-mentioned introduction to the treatment method of refractory organic wastewater in the prior art, the inventor found that the above-mentioned prior art at least has the disadvantag

Method used

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  • Treating system and treating method for hardly degradable organic waste water
  • Treating system and treating method for hardly degradable organic waste water
  • Treating system and treating method for hardly degradable organic waste water

Examples

Experimental program
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Embodiment 1

[0027] This embodiment provides a kind of refractory organic wastewater treatment system, such as figure 1 As shown, the treatment system includes: coagulation sedimentation treatment area, ozone reaction area, biological aerated filter treatment area, ultrafiltration treatment area and reverse osmosis treatment area;

[0028] Among them, the coagulation and sedimentation treatment area is connected with the biological aerated filter treatment area, the ultrafiltration treatment area, and the reverse osmosis treatment area in sequence, and the ultrafiltration concentrated water outlet of the ultrafiltration treatment area is connected back to the coagulation and sedimentation treatment area through the return pipeline. area, the water outlet of the reverse osmosis treatment area is used to connect with the recycling device.

[0029] The coagulation-sedimentation treatment area in the above-mentioned treatment system is formed by sequentially connecting the coagulation reaction...

Embodiment 2

[0039] The embodiment of the present invention provides a method for advanced treatment of refractory organic wastewater, using the refractory organic wastewater treatment system given in the first embodiment above, such as figure 2 As shown, the method includes the following steps:

[0040] The effluent of the treated refractory organic wastewater after being settled in the secondary settling tank enters the coagulation-sedimentation treatment area of ​​the system for coagulation-sedimentation treatment;

[0041] The effluent after coagulation and sedimentation treatment in the coagulation and sedimentation treatment area enters the ozone reaction area, and undergoes ozone oxidation treatment to remove part of the organic matter and improve the biodegradability of the wastewater;

[0042] The effluent after ozone oxidation treatment in the ozone reaction area enters the biological aerated filter treatment area, and the remaining organic matter in the water is removed by aera...

Embodiment 3

[0055] This embodiment provides a method for advanced treatment of refractory organic wastewater. The treatment system described in Example 1 is used to treat the refractory organic wastewater after being treated in a secondary sedimentation tank. The specific process is as follows:

[0056] The 280m3 / h effluent of the refractory organic wastewater secondary sedimentation tank enters the coagulation reaction tank and then enters the coagulation sedimentation tank after adding the flocculant PAC. Gas biofilter, the effluent of aerated biological filter enters the intermediate pool, the effluent of the intermediate pool is lifted by the ultrafiltration feed water pump as a lifting pump, and then enters the ultrafiltration equipment, the ultrafiltration effluent enters the ultrafiltration water production pool, and the ultrafiltration production crystal lift pump lifts After entering the reverse osmosis equipment, 210m3 / h reverse osmosis produced water is reused, and 70m3 / h revers...

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Abstract

The invention discloses a treating system and a treating method for hardly degradable organic waste water, belonging to the field of sewage treatment. The system comprises a coagulating sedimentation treatment zone, an ozone reaction zone, a biological aerated filter treatment zone, an ultrafiltration treatment zone and a reverse osmosis treatment zone, wherein the coagulating sedimentation treatment zone is successively connected with the biological aerated filter treatment zone, the ultrafiltration treatment zone and the reverse osmosis treatment zone, an ultrafiltration concentrated water outlet of the ultrafiltration treatment zone is in return connection with the coagulating sedimentation treatment zone through an ultrafiltration concentrated water return line, and a water outlet of the reverse osmosis treatment zone is connected with a reuse device. According to the invention, the system utilizes the ozone reaction zone and the biological aerated filter treatment zone for pretreatment after coagulating sedimentation, then ultrafiltration is carried out in the ultrafiltration treatment zone to remove suspended solids, colloids and a part of organic matters in water after pretreatment, the effluent of ultrafiltration enters into the reverse osmosis treatment zone for reverse osmosis treatment so as to further remove macro-molecular organic matters in water and hardness and salinity of water and improve water quality of the effluent, and the treated hardly degradable organic waste water reaches water requirements on recirculated cooling water or boiler feed water.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a treatment system and a treatment method for direct reuse of refractory organic waste water after advanced treatment. Background technique [0002] In the prior art, there are mainly three treatment methods for the reuse of refractory organic wastewater, namely coagulation sedimentation method, advanced oxidation method and membrane bioreactor (MBR) method. [0003] Among them, the coagulation and sedimentation method is to add high-efficiency flocculants directly to the refractory organic wastewater, which can remove part of the organic matter and suspended matter, but because it can only remove part of the organic matter and suspended matter, it cannot remove the hardness and salt in the water. It meets the water standard of circulating cooling water or boiler feed water, and its operating cost is high, which limits its application range. [0004] The advanced oxidation m...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 王建泰王凯文一波陈长松于金良左青仝延忠
Owner BEIJING SOUND ENVIRONMENTAL ENG
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