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Coking waste water treatment method of tetravalence manganese compound oxidation, chemical precipitation and biochemical combination

A technology of coking wastewater and chemical precipitation, which is applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, and bio-organic part treatment, etc. It can solve the problems of difficulty in wide application, large consumption of chemicals, materials and energy, and high treatment costs. Achieve the effect of improving biodegradability, low cost, and small investment

Inactive Publication Date: 2007-03-14
HEFEI UNIV OF TECH
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  • Claims
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Problems solved by technology

[0003] The methods currently being studied to treat coking wastewater mainly include catalytic wet oxidation, ozone oxidation, electrochemical method, chlorine and its derivative oxidant oxidation method, adsorption method, photocatalytic oxidation method, ultrasonic activated sludge method, plasma method, etc. , but due to the large consumption of chemicals, materials and energy in the above method for coking wastewater treatment, the treatment cost is high
Therefore, there are great difficulties in the widespread application of these technologies in practical wastewater treatment.

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  • Coking waste water treatment method of tetravalence manganese compound oxidation, chemical precipitation and biochemical combination
  • Coking waste water treatment method of tetravalence manganese compound oxidation, chemical precipitation and biochemical combination
  • Coking waste water treatment method of tetravalence manganese compound oxidation, chemical precipitation and biochemical combination

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Embodiment

[0046] Taking the coking wastewater from the coking workshop of the iron and steel complex as the object, the concentration of pollutants in it is 1262mg / L of phenols (calculated as phenol), 6821mg / L of COD, and 6821mg / L of NH 4 -N is 4177mg / L, S 2- 64.3mg / L. Wastewater is treated according to the experimental device in Figure 4, the concentration of pollutants in the effluent is regularly measured, and the removal rate of pollutants is calculated.

[0047] The coking wastewater is injected into the oxidation reactor, and excessive natural manganese oxide-pyrolulusite is added to the oxidation reactor.

[0048] Sulfuric acid is added to the oxidation reactor to adjust the pH value of the wastewater to 1.5, and the residence time of the wastewater in the oxidation reactor is 2 hours.

[0049] The water after the oxidation reaction is injected into the neutralization reactor, and magnesite is added to the neutralization reactor to make the pH value of the effluent 9. During t...

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Abstract

The combined coking waste water treating process comprising oxidation, chemical precipitation and biochemical treatment includes the following steps: throwing four-valent manganese compound into coking waste water to oxidize organic matter and produce bivalent manganese ion, oxidizing the bivalent manganese ion to obtain four-valent manganese compound for reuse, adding phosphate to deposit ammonia nitrogen in magnesium ammonium phosphate form, recovering the deposit for use as slow released fertilizer, and final biochemical treatment of the waste water. The process consumes sulfuric acid, magnesite and phosphate mainly, and has the four-valent manganese compound used circularly and thus relatively low cost.

Description

Technical field: [0001] The invention relates to a water treatment method, in particular to a treatment method for coking wastewater. Background technique: [0002] The commonly used methods for the treatment of coking wastewater mainly include biochemical degradation and chemical coagulation sedimentation after ammonia distillation and dephenol pretreatment. The biochemical method is to remove ammonia nitrogen and remove some phenolic substances through ammonia distillation and dephenol pretreatment, reduce the toxicity of phenolic substances to organisms, enhance the biodegradability of wastewater, and then undergo anaerobic / aerobic (A / O) biological treatment Discharge up to standard; chemical coagulation sedimentation method has low cost, but the removal of pollutants is limited and the effect is not good. It is generally used for pretreatment or advanced treatment of wastewater. Generally speaking, the content of ammonia nitrogen and phenolic substances in coking indust...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/72C05F7/00
CPCY02A40/20Y02W30/40
Inventor 陈天虎谢晶晶宋垠先庆承松朱承驻彭书传
Owner HEFEI UNIV OF TECH
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