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Saliferous organic wastewater treatment method

A treatment method and technology for organic wastewater, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problems of increasing the cost of wastewater treatment, large consumption of oxidants and catalysts, etc.

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when catalytic oxidation technology is used to treat certain organic wastewater, the consumption of oxidant and catalyst is relatively large, which increases the cost of wastewater treatment

Method used

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  • Saliferous organic wastewater treatment method

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Effect test

Embodiment 1

[0027] Treatment of reverse osmosis concentrated water in a factory. The conductivity of the wastewater is 7300μs / cm, and the COD is 120mg / L. The operating conditions are determined as follows: carbon nanotube electrodes are used, the operating voltage of the electrosorption module is 1.5v, and the residence time of wastewater is 18 minutes; the pH value of the influent water in the catalytic oxidation reactor is 5, ferrous sulfate is used as the catalyst, and hydrogen peroxide is used as the oxidant. The residence time of wastewater is 40 minutes; the pH of the wastewater influent in the flocculation tank is 7, and the residence time of wastewater is 20 minutes. The test results are shown in Table 1.

Embodiment 2

[0031] Treatment of circulating water and sewage from a factory. The conductivity of the wastewater is 5600μs / cm, and the COD is 90mg / L. The operating conditions are determined as follows: activated carbon fiber is used as the electrode, the operating voltage of the electrosorption module is 1v, the residence time of the wastewater is 15 minutes, the pH value of the influent water in the catalytic oxidation reactor is 4, ferrous sulfate is used as the catalyst, hydrogen peroxide is used as the oxidant, and the wastewater The residence time is 50 minutes, the pH of the wastewater influent in the flocculation tank is 7.5, and the residence time of the wastewater is 30 minutes. The experimental results are shown in Table 1.

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Abstract

The invention relates to a water treatment method which comprises the following steps: carrying out electro-adsorption desalting on wastewater in a electro-adsorption device; carrying out catalytic oxidation reaction on the wastewater subjected to electro-adsorption desalting in a catalytic oxidation reactor; and carrying out flocculating setting on the wastewater subjected to catalytic oxidationtreatment in a flocculating setting basin. The saliferous organic wastewater treatment method provided by the invention can be used for reducing the consumption of the catalyst and oxidizer in a catalytic oxidation step and simultaneously reducing the yield of flocculation waste residues. The wastewater treated by utilizing the method provided by the invention can be used as recirculated cooling water.

Description

technical field [0001] The invention relates to a treatment method for salt-containing organic wastewater. Background technique [0002] In recent years, the shortage of water resources and the deterioration of water environment in my country have become increasingly prominent. Water conservation and emission reduction is the fundamental way to solve this problem, so it has received more and more attention. Recycling sewage after treatment can not only save a lot of water resources, but also greatly reduce the discharge of sewage, so it has become the focus of water conservation and emission reduction. [0003] For the sewage with high salt content, it is usually pretreated to reduce the COD and other impurities in the wastewater, and then treated with desalination technologies such as reverse osmosis, electroosmosis, ion exchange, and electrosorption before it can be reused as circulating cooling water Or boiler water. The basic principle of electro-adsorption desalinati...

Claims

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Application Information

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IPC IPC(8): C02F9/06
Inventor 高峰张利强马欣
Owner CHINA PETROLEUM & CHEM CORP
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