Decoloring method for wastewater with low treatment cost

A waste water and cost technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of narrow pH value application range and practical application limitations, and achieve pH value application range Wide range, high decolorization efficiency, and the effect of reducing treatment costs

Inactive Publication Date: 2013-05-01
HARBIN ENG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the homogeneous Fenton system needs to add chemical reagents as the iron source during its operation, and the homogeneous Fenton system has a better effect only under the condition of low pH value, and the applicable range of pH value is narrow, so the practical application is limited

Method used

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  • Decoloring method for wastewater with low treatment cost
  • Decoloring method for wastewater with low treatment cost
  • Decoloring method for wastewater with low treatment cost

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Embodiment Construction

[0021] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0022] to combine figure 1 The reactor composition of the present invention comprises a cathode chamber 1 and an anode chamber 2, separated by a proton exchange membrane 3 between the two pole chambers, an anode 4 and an air cathode 5 are respectively placed inside the anode chamber 1 and outside the cathode chamber 2, and the anode material adopts Carbon felt, etc., the cathode 5 is an air cathode loaded with α-FeOOH catalyst. The lower and upper ends of the cathode chamber and the anode chamber of the square reactor are respectively provided with water inlets 6, 8 and water outlets 7, 9. The two poles are connected by copper wires and connected with the load 10 to form a closed loop, and the adjustment range of the load is 1-10000Ω. In order to improve the removal efficiency, an external power supply 11 can also be connected between the two poles.

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Abstract

The invention provides a decoloring method for wastewater with low treatment cost. The method comprises the steps of: using an electrochemically active microorganism enriching carbon material as an anode and an air electrode containing an alpha-FeOOH iron source as a cathode; degrading wastewater in an anode chamber by the electrochemically active microorganisms on the surface of the anode and transferring electrons to the surface of the anode by extracellular electron transferring capacity of electrochemically active microorganisms; then, providing the electrons to the cathode through an external circuit, and meanwhile reducing the electrons by surface oxidation of the air cathode to generate H2O2; carrying out heterogeneous Fenton reaction with the iron source alpha-FeOOH carried by the cathode; realizing heterogeneous bioelectricity Fenton process of alpha-FeOOH; and generating hydroxyl free radicals to decolor wastewater of a dye. The method provided by the invention is not only suitable for treating wastewaters such as the dye, but also suitable for treating various organic wastewaters. The method has a wide application prospect in actual application.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a method for treating dye wastewater by using α-FeOOH heterogeneous bioelectrical Fenton technology, synchronously generating electric energy, and reducing treatment cost. Background technique [0002] At present, there are about 2,000 different dyes widely used in various industries such as textiles, food, printing, and cosmetics. Various industries produce a large amount of dye wastewater, and the pollution area is becoming wider and wider. It has become one of the most important sources of water pollution. . Dye wastewater has a great impact on the environment, in addition, some dyes pose a potential threat to human health. Most dye wastewater is difficult to treat industrial wastewater, with high chroma, high COD and inorganic salt content, complex components, poor biodegradability, and high treatment costs. Therefore, it is urgent to explore new treatment methods with low treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor 温青陈野矫彩山李凯峰姚楠荣景瑶
Owner HARBIN ENG UNIV
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