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Method for processing industrial wastewater by membrane separation/catalytic degradation composite process

A technology for catalytic degradation of industrial sewage, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of unable to recycle and reuse sewage, time-consuming, low efficiency, etc. Achieve significant decontamination and purification efficiency, simple process, and high wear resistance

Active Publication Date: 2013-09-18
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method combines membrane separation technology and catalytic degradation technology, which can not only solve the time-consuming, energy-consuming and inefficient problems of a single physical filtration method, but also solve the problem that useful substances in sewage cannot be recovered and reused by chemical catalytic degradation alone. , with efficient decontamination and purification ability

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] The method for the membrane separation / catalytic degradation composite process of the present embodiment to treat industrial sewage comprises the following steps:

[0032] Step 1. Accurately measure 10L of industrial sewage from a banknote printing factory in Shaanxi. The measured water quality analysis data is shown in Table 1. The measured industrial sewage to be treated is separated by a membrane separator through a microfiltration membrane with a pore size of 200nm. treatment, so that the useful substances in the membrane separation retentate are subsequently extracted and recycled; the temperature of the membrane separation treatment is 40°C, the pressure of the membrane separation treatment is 0.5MPa, and the microfiltration membrane is TiO 2 Ceramic Membrane;

[0033] Step 2, use the filtrate after membrane separation treatment in step 1 as the electrocatalytic treatment solution, use the graphite electrode as the cathode, and use the sheet-shaped porous titanium...

Embodiment 2

[0040] The method for the membrane separation / catalytic degradation composite process of the present embodiment to treat industrial sewage comprises the following steps:

[0041] Step 1. Accurately measure 5L of industrial sewage from a paper mill in Hanzhong City, Shaanxi Province. The measured water quality analysis data is shown in Table 2. A membrane separator is used to pass the measured industrial sewage through an ultrafiltration membrane with a pore size of 20nm. Membrane separation treatment, so that the useful substances in the membrane separation retentate are subsequently extracted and recycled; the temperature of the membrane separation treatment is 40°C, the pressure of the membrane separation treatment is 0.3MPa, and the ultrafiltration membrane is Al 2 o 3 Ceramic Membrane;

[0042] Step 2. Use the filtrate after membrane separation treatment in step 1 as the electrocatalytic treatment solution, use the graphite electrode as the cathode, and use the sheet-shap...

Embodiment 3

[0048] The method for the membrane separation / catalytic degradation composite process of the present embodiment to treat industrial sewage comprises the following steps:

[0049] Step 1. Accurately measure 20L of industrial sewage from Changqing Oilfield in Shaanxi Province. The measured water quality analysis data are shown in Table 3. Use a membrane separator to pass the measured industrial sewage to be treated through a microfiltration membrane with a pore size of 500nm for membrane separation treatment , so that the useful substances in the membrane separation retentate are subsequently extracted and recycled; the temperature of the membrane separation treatment is 90°C, the pressure of the membrane separation treatment is 0.8MPa, and the microfiltration membrane is ZrO 2 Ceramic Membrane;

[0050] Step 2, use the filtrate after membrane separation treatment in step 1 as the electrocatalytic treatment solution, use the graphite electrode as the cathode, and use the tubular...

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Abstract

The invention provides a method for processing industrial wastewater by a membrane separation / catalytic degradation composite process. The method comprises the following steps that 1, the industrial wastewater with the COD (chemical oxygen demand) greater than or equal to 10000mg / L is subjected to membrane separation treatment, and substances such as suspended matters, polymers and oil in sewage are removed; 2, filtrate after membrane separation is subjected to electric catalytic treatment, organic pollutants in water are degraded, and in addition, harmlessness or mineralization is realized for metal ions in the water; 3, the filtrate is further subjected to photoelectrocatalysis treatment, and pollutants in the water are degraded until the COD of the treated water is smaller than or equal to 90mg / L. The method has the advantages that the process is simple, the operation is safe, the control is easy, the membrane separation technology and the catalytic degradation technology are combined, the problems of time consumption, energy consumption and low efficiency of the simple membrane separation treatment method are solved, meanwhile, the difficult problem that useful matters in the sewage cannot be easily recovered and reutilized by the catalytic degradation treatment method is solved, and in addition, the obvious decontamination and purification efficiency is realized.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for treating industrial sewage by a membrane separation / catalytic degradation composite process. Background technique [0002] At present, my country's industrial water reuse rate is less than 50%, which is far behind the world's advanced level. With the acceleration of industrialization, industrial water consumption will increase substantially, and the contradiction between supply and demand of water resources will become more prominent. Therefore, it is very necessary to develop and apply industrial sewage deep purification technology and equipment on a large scale to continuously improve the reuse rate of industrial water and achieve sustainable economic and social development. [0003] As a promising new technology, microfiltration or ultrafiltration membrane separation technology has been widely used in the field of wastewater treatment du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F1/44
CPCY02W10/37
Inventor 李广忠向长淑张文彦李纲
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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