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Method for treating xanthate wastewater through combination of film biodegradation and hydrogen peroxide oxidation

A hydrogen peroxide and combined treatment technology, applied in the field of environmental protection, can solve problems such as reduced operating costs, and achieve the effects of stable effluent quality, easy automatic control, and high pollutant concentration

Inactive Publication Date: 2009-12-02
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the development of various new membrane bioreactors, such as gravity submerged MBR and anaerobic MBR operating at low pressure, has greatly reduced operating costs compared with traditional aerobic pressurized membrane bioreactors.

Method used

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  • Method for treating xanthate wastewater through combination of film biodegradation and hydrogen peroxide oxidation
  • Method for treating xanthate wastewater through combination of film biodegradation and hydrogen peroxide oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The method of the present invention includes two-stage treatment processes, namely, membrane biodegradation treatment and hydrogen peroxide oxidation treatment, and the steps are as follows.

[0044] 1. Membrane biodegradation;

[0045] The xanthate wastewater to be treated is introduced into the adjustment tank, and transported into the primary sedimentation tank by a sewage pump, and the sewage enters the membrane bioreactor from the primary sedimentation tank.

[0046] The start and stop of the extraction pump is controlled by the time relay. The operation parameters of the extraction pump are: run for 10 minutes and stop for 2 minutes. When the extraction pump stops, the time relay controls the solenoid valve to start working, and the solenoid valve changes from the closed state to the open state. , the outlet pipe of the membrane bioreactor is connected to the atmosphere, and the negative pressure generated during the pumping process of the extraction pump is quick...

Embodiment 2

[0054] 1. Membrane biodegradation;

[0055] The xanthate wastewater to be treated is introduced into the adjustment tank, and transported into the primary sedimentation tank by a sewage pump, and the sewage enters the membrane bioreactor from the primary sedimentation tank.

[0056] The start and stop of the extraction pump is controlled by the time relay. The operation parameters of the extraction pump are: run for 15 minutes and stop for 5 minutes. When the extraction pump stops, the time relay controls the solenoid valve to start working, and the solenoid valve changes from the closed state to the open state. , the outlet pipe of the membrane bioreactor is connected to the atmosphere, and the negative pressure generated during the pumping process of the extraction pump is quickly eliminated, so as to achieve the effect of slowing down the membrane pollution.

[0057] The volumetric load of the control membrane bioreactor is kept at 5.0kgCOD / (m 3 d), the hydraulic retention...

Embodiment 3

[0064] 1. Membrane biodegradation;

[0065] The xanthate wastewater to be treated is introduced into the adjustment tank, and transported into the primary sedimentation tank by a sewage pump, and the sewage enters the membrane bioreactor from the primary sedimentation tank.

[0066] The start and stop of the extraction pump is controlled by the time relay. The operation parameters of the extraction pump are: run for 12 minutes and stop for 3 minutes. When the extraction pump stops, the time relay controls the solenoid valve to start working, and the solenoid valve changes from the closed state to the open state. , the outlet pipe of the membrane bioreactor is connected to the atmosphere, and the negative pressure generated during the pumping process of the extraction pump is quickly eliminated, so as to achieve the effect of slowing down the membrane pollution.

[0067] The volumetric load of the control membrane bioreactor is kept at 3.8kgCOD / (m 3 d), the hydraulic retention...

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Abstract

The invention relates to a method for treating xanthate wastewater through combination of film biodegradation and hydrogen peroxide oxidation, which belongs to the technical field of sewage treatment. The method comprises two sections of treatment processes, namely the film biodegradation and the hydrogen peroxide oxidation. The method comprises the following steps: controlling the volume loading of a film bioreactor to between 3.0 and 5.0 kgCOD / (m.d), controlling the hydraulic power residence time in the reactor to between 18 and 36 hours and the sludge residence time to between 75 and 150 days, controlling the dissolved oxygen concentration to between 2.5 and 4.0 milligrams per liter, controlling the temperature in the reactor to between 20 and 35 DEG C and the active sludge concentration to between 10,000 and 15,000 milligrams per liter, and controlling the sludge loading to between 0.11 and 0.17 kgCOD / (kgMLSS.d); and adjusting the pH value of the sewage in a reaction tank to between 3 and 5, adding 5 to 10 mg / L H2O2 to perform oxidation treatment for 30 to 60 minutes, and after the oxidation treatment, discharging the purified water. Through the treatment by the method, the removal rate of the COD and the xanthate reaches more than 90 percent and more than 99 percent respectively.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, relates to sewage treatment technology, and particularly relates to a treatment method for xanthate wastewater. Background technique [0002] In the flotation of non-ferrous metal sulfide ores, due to the characteristics of production scale and continuity, a large amount of xanthate needs to be used as a flotation agent. The chemical name of xanthate (xanthate) is hydrocarbyl dithiocarbonate, the chemical formula is ROCSSNa, and butyl xanthate is currently the most widely used. Butyl xanthate is light yellow powder with pungent odor, easily decomposed and soluble in water. It has been found that wastewater containing xanthate can give off-smelling surface water when discharged in large quantities. If the toxicity of various flotation agents is divided into five grades, butyl xanthate is moderately toxic. In water bodies, xanthate will inhibit the growth of many aquatic organis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/12C02F1/72C02F3/10C02F1/44C02F101/34
CPCY02W10/10
Inventor 姜彬慧黄娅琼李瑛伟
Owner NORTHEASTERN UNIV
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