Method for treatment of high-salinity and high-concentration organic wastewater through process of high-efficiency photocatalytic vacuum separation of gas phase, liquid phase and solid phase

An organic waste water, high-concentration technology, applied in the field of water treatment, can solve the problems of many treatment procedures, complex treatment, troublesome recycling, etc., and achieve the effect of reducing secondary pollution, efficient process, and simple and easy-to-operate process

Active Publication Date: 2010-07-07
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method mentions the utilization of salts, but in addition to useful salts, the concentrated solution also contains a large amount of impurities, which makes recovery more troublesome
Among the published patents, an invention patent—catalytic oxidation biochemical combination process for treating highly toxic, high-concentration, high-salt organic wastewater (publication number: CN 101314510A), proposes to apply three-effect vacuum distillation technology to wastewater treatment technology The organic combination with the follow-up catalytic oxidation technology and bi

Method used

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Examples

Experimental program
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Example Embodiment

Specific embodiment 2:

[0022] The COD is 36421mg / L, pH 6.7 Na-containing 2 SO 4 The high-salinity and high-concentration organic wastewater is sent to the pretreatment tank, and after passing through the grid in the tank, the larger particles of suspended matter can be removed. The pretreated water is introduced into the photocatalytic vacuum liquid-solid three-phase high-efficiency separator, and fresh MnO is added 2 The liquid undergoes oxidation reaction to degrade organic matter. Steam heating is used to maintain the reaction temperature. In order to make the final effluent discharge up to the standard, the effluent from the previous step is introduced into the advanced treatment tank; and to ensure no secondary pollution to the atmosphere, the photocatalytic vacuum air is liquid-solid The gas phase or tail gas produced by the three-phase high-efficiency separator is passed into the original wastewater or other wastewater, and then into the photocatalytic treatment device. T...

Example Embodiment

Specific embodiment 3:

[0023] The COD is about 373780mg / L, NH 3 -N is about 3196mg / L, pH value is about 7.0 containing Na 2 HPO 4 The high-salinity and high-concentration organic wastewater is sent to the pretreatment tank, after passing through the grid in the pool, the larger particles of suspended matter can be removed. The pretreated water is introduced into the photocatalytic vacuum liquid-solid three-phase high-efficiency separator, and H 2 O 2 Catalytic oxidation reaction occurs, and microwave heating is used to maintain the reaction temperature. In order to make the final effluent discharge up to the standard, the effluent from the previous step is introduced into the advanced treatment tank; and to ensure no secondary pollution to the atmosphere, the photocatalytic vacuum liquid-solid three-phase high efficiency The gas phase generated by the separator, the tail gas, is passed into the original wastewater or other wastewater, and then into the photocatalytic treatment de...

Example Embodiment

Specific embodiment 4:

[0024] The COD is about 4755mg / L, NH 3 -N is about 30291mg / L, pH value is about 9.6 containing NH 4 The Cl high-salinity and high-concentration organic wastewater is sent to the pretreatment tank, after passing through the grid in the tank, the larger particles of suspended solids can be removed, the pretreated water is introduced into the adjustment tank, and HCl or other acidic substances are added to adjust the pH to 6 -9. The water obtained in the previous step is introduced into the photocatalytic vacuum vacuum liquid-solid three-phase high-efficiency separator, and O is added 3 Oxidation reaction occurs to degrade organic matter, and infrared lamp heating is used to maintain the reaction temperature. In order to make the final effluent meet the discharge standard, the effluent from the previous step is introduced into the advanced treatment tank; and to ensure no secondary pollution to the atmosphere, the photocatalytic vacuum air is liquid-solid Th...

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Abstract

The invention relates to a method for treatment of high-salinity and high-concentration organic wastewater (wherein salts can be NH4Cl, MgCl2, MgSO4, NaCl, Na2SO4, Na2HPO4 and the like) through a series of processes comprising pretreatment, pH adjustment, high-efficiency photocatalytic separation of gas phase, liquid phase and solid phase and advanced treatment. When the invention is used, the effluent quality can meet the requirements of secondary discharge standards of the category of petroleum and chemical in the Integrated Wastewater Discharge Standard (GB8978-1996), and salt can be recycled from wastewater. In addition, in order to avoid secondary pollution, the invention realizes the photocatalytic treatment of exhaust generated by the high-efficiency photocatalytic separation of the gas phase, the liquid phase and the solid phase, and most of the organic substances in the exhaust can be degraded to remove odor. Moreover, the invention proposes the view of treating waste with waste, namely, feeding the exhaust generated by wastewater into raw wastewater or other kinds of raw wastewater, thereby reducing the exhaust emission and further lowering the difficulty in photocatalytic treatment of the exhaust. The invention has the advantages of low cost, high efficiency, easy operation and no secondary pollution, and is applicable to the treatment of high-salinity and high-concentration organic wastewater.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to the treatment of high-salt, high-concentration organic waste water and its tail gas by a photocatalytic vacuum air-liquid-solid three-phase high-efficiency separation process. Background technique [0002] With the rapid growth of my country's economy, the number of chemical and pharmaceutical companies has increased, and their products will produce a large amount of high-salt, high-concentration organic wastewater in the production process. These wastewater have complex chemical components, high salt content, and high organic concentration. It is difficult to use It is difficult to obtain satisfactory results by using traditional wastewater treatment technology for direct biochemical treatment. Therefore, the purification treatment of this kind of wastewater is one of the hot spots in the field of environmental protection research. [0003] In view of the hig...

Claims

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Application Information

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IPC IPC(8): C02F9/14B01D53/86C02F1/30
CPCY02W10/37
Inventor 王家强李恒陶辉旺孙巧丽
Owner YUNNAN UNIV
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