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Reduction treatment method for waste water

A treatment method and wastewater technology are applied in the field of wastewater reduction treatment, reducible organic matter and heavy metal wastewater treatment, which can solve the problem of easy deactivation of activated carbon, achieve low cost, flexible and convenient installation and operation, and promote treatment effect. Effect

Inactive Publication Date: 2008-04-30
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a major defect of this technology is the hardening of iron filings, and activated carbon is also easily deactivated due to the adsorption of organic matter.

Method used

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  • Reduction treatment method for waste water
  • Reduction treatment method for waste water

Examples

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Effect test

Embodiment 1

[0019] Example 1: Nitrophenol is a typical toxic organic pollutant, and nitrophenol in industrial waste water is quite harmful. Configure 28mg / L nitrophenol aqueous solution, use 0.05mol / L phosphate buffer to control the pH of the system, use iron rod (Φ25mm×90mm) and carbon rod (Φ25mm×90mm) as anode and cathode respectively, iron rod and The carbon rods are connected by wires with a distance of 5 cm. The change of nitrophenol concentration with time is shown in Fig. 2. Series carbon can greatly improve the degradation effect of nitrophenol, and the effect of series carbon is equivalent to that of iron-carbon direct contact.

Embodiment 2

[0020] Example 2: Nitrobenzene is a typical toxic organic pollutant. This example takes mg / L aqueous solution of nitrobenzene as the research object, using an iron rod (Φ25mm×90mm) as the anode, and a copper rod (Φ25mm×90mm) It is the cathode, and the anode and cathode are connected by wires with a distance of 5 cm. The degradation of nitrobenzene is shown in Figure 3. It can be seen that the degradation effect of p-nitrobenzene is also greatly improved after iron and copper are connected in series.

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Abstract

The invention discloses a waste water reduction treatment process, which comprises steps as follows: (1), processing pretreatment on waste water, adjusting the pH value of waste water to acid, removing suspension, and arranging electrodes in a reactor, while the electrode distance is 1-50cm and the electrodes are alternatively arranged with cathode and anode, or arranged radial, wherein the anode material is iron, and the cathode uses carbon, copper, nickel, palladium or manganese dioxide, (2), arranging the waste water after pretreatment into the reactor, using a wire to connect the anode and cathode to process 0.5-4h, discharging waste water, adds sodium hydride or lime solution to adjust pH value to 8-9, deposits flocculates, and feeding supernatant into following treatment. The invention is characterized in low energy consumption, environment protection, better treatment effect, and simple operation.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a waste water reduction treatment method, which is suitable for the treatment of reducible organic matter and heavy metal waste water. technical background [0002] my country's water pollution problem is also very prominent, and the current water resources are becoming increasingly tense. Water pollution has a great impact on the ecological security of aquatic organisms and crops, as well as human health. Industrial wastewater is one of the important sources of water pollution, so it is very important to treat industrial wastewater. [0003] The current wastewater treatment methods mainly include physical and chemical methods and biological methods. Commonly used physical and chemical methods, such as coagulation and sedimentation, can only be effective for pollutants with good flocculation, and have no obvious effect on pollutants with good water sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46
Inventor 袁松虎陆晓华
Owner HUAZHONG UNIV OF SCI & TECH
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