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Technique for treating phenol/anisole-containing production wastewater

A technology for the production of waste water and treatment process, which is applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems that there are no relevant reports on the treatment process of phenolic waste water, and achieve low cost , The catalytic effect is obvious, and the effect of reducing the content of anisole and COD

Inactive Publication Date: 2013-03-20
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant report on the treatment process of phenolic wastewater in the production process of anisole by using this process.

Method used

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  • Technique for treating phenol/anisole-containing production wastewater
  • Technique for treating phenol/anisole-containing production wastewater
  • Technique for treating phenol/anisole-containing production wastewater

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Embodiment Construction

[0026] The raw water composition of wastewater is COD: 49000mg / L, volatile phenol: 6000mg / L, methanol: 4500mg / L, anisole: 1400mg / L. The waste water first enters the air flotation unit. The concentration of the air flotation agent polyaluminium chloride is 500mg / L. The bottom of the air flotation unit is fed with a mixture of soda and water from a pressurized dissolved air tank. The pressure of the dissolved air tank is 0.2MPa, and the waste water is in the air flotation tank. The residence time is controlled at 3h. After the wastewater is treated by the air flotation unit, it enters the adjustment tank 1, and the pH is adjusted to 5. The effluent from the adjustment tank 1 enters the top of the multi-stage extraction tower through the centrifugal pump. The effective extraction stages of the extraction tower are 8, and the extraction agent enters the extraction tower through the magnetic pump. At the bottom, the extraction oil-water ratio is controlled at 1:5, and the compositi...

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Abstract

The invention discloses a technique for treating phenol / anisole-containing production wastewater, particularly a method for treating phenol / anisole-containing production wastewater by a floatation-high efficiency extraction-membrane bioreactor (MBR)-catalytic oxidation technique. The technique comprises steps as follows: raw water firstly enters a floatation unit to remove suspended substances, and then enters an extraction unit, wherein an extractant composed of N-octanoylpyrrolidine, tributyl phosphate, dimethyl carbonate and solvent kerosene in a ratio of 0.8:1.2:2.9:7 is utilized to carry out dephenolization treatment; the treated wastewater enters an MBR unit to carry out biochemical degradation of methanol; and the wastewater finally enters a sodium hypochlorite-alpha-Fe2O3 catalytic oxidation unit to remove anisole by deep oxidation. The invention provides a new technique for efficiently treating phenol / anisole-containing production wastewater; and by using the technique, the removal rates of wastewater COD (chemical oxygen demand), volatile phenols, methanol and anisole are respectively up to 99.7%, 99.99%, 99.12% and 99.97%.

Description

technical field [0001] The invention relates to a process for treating phenol-containing anisole production wastewater, in particular to a method for treating phenol-containing anisole production wastewater by adopting an air flotation-high-efficiency extraction-membrane bioreactor-catalytic oxidation process. Background technique [0002] Phenolic compounds are important chemical raw materials and chemical intermediates, as well as by-products in many chemical production processes. Many chemical production processes including coking, oil refining, resin, coal chemical industry, etc. will produce phenolic wastewater. Phenolic substances, as a kind of environmental hormones, are prototypical toxic substances. When the human body ingests a certain amount, it will cause protein denaturation and coagulation, and symptoms of acute poisoning may occur, such as headache, dizziness, fatigue, and dyspnea. When the phenol content in the water is 0.1-0.2ppm, it can make the fish meat ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/36
Inventor 韩煦王为民赵金城
Owner TIANJIN POLYTECHNIC UNIV
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