Recovery processing method for acid wastewater

A technology for recycling and treating acidic wastewater, which is applied in separation methods, general water supply saving, and separation of dispersed particles.

Inactive Publication Date: 2009-07-01
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this treatment method, due to the need to add additional ions, the conductivity of the wastewater increases, which in turn leads to an increase in the cost of chemical agents and electricity costs for desalination

Method used

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  • Recovery processing method for acid wastewater
  • Recovery processing method for acid wastewater
  • Recovery processing method for acid wastewater

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Embodiment Construction

[0013] In order to make the above-mentioned and other purposes, features and advantages of the present invention more obvious and understandable, the following examples are specially cited, and in conjunction with the accompanying drawings, the detailed description is as follows:

[0014] figure 1 A schematic diagram showing a recovery and treatment method for acidic wastewater containing metal ions according to an embodiment of the present invention. exist figure 1 Among them, at first, the acidic wastewater containing metal ions is introduced from the raw water inlets 2 and 3, or referred to as raw water, to the electrolytic deionization device of, for example, an inverted electrodialysis (electrodialysis reversal; EDR) device 8 to perform desalination ( desalination) and steps to remove metal ions. Next, the recycled product water and the concentrated water are led out through the fresh water outlet 4 and the concentrated water outlet 6 respectively.

[0015] In addition...

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Abstract

The invention provides a method for recovering and treating acidic wastewater. The method for recovering and treating acidic wastewater comprises: introducing acidic wastewater (pH less than 7) containing metal ions to an electrodialysis reversal device and carrying out the steps of desalination and metal ion removal at the same time; and leading out the acidic recovered producing water. As the method for recovering and treating acidic wastewater can directly introduce the acidic waste water containing the metal ions into the electrodialysis reversal device without carrying out steps of pH value adjustment and settlement in advance, the steps of the recovery and treatment method are simplified and the cost is reduced at the same time.

Description

[0001] The invention relates to a water recovery and treatment method, in particular to a recovery and treatment method for acidic wastewater containing metal ions. 【Background technique】 [0002] Due to factors such as population expansion, environmental pollution, and climate change, global water resources are scarce, and the problem of water resources has become one of the most important issues facing human beings in the future. In order to reduce the crisis of water scarcity and avoid conflicts caused by disputes over water resources, it is necessary to plan and manage water resources effectively. At the same time, it is also necessary to recycle and reuse industrial wastewater to use water resources more effectively. [0003] Generally speaking, the water treatment and recovery technologies commonly used in desalination mainly include: ion exchange resin method, reverse osmosis (RO) method, electrodialysis (ED) method and electrodialysis reversal (electrodialysis reversal...

Claims

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Application Information

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IPC IPC(8): C02F1/469
CPCY02A20/124
Inventor 陈致君梁德明廖启钟连文萍
Owner IND TECH RES INST
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