Process and device for processing heavy metal wastewater

Abstract

The invention provides a process and a device for processing heavy metal wastewater. The device mainly comprises a wastewater electroplating and rinsing pool, a concentrated liquid circulating pool, an inverse penetrating / nanofiltering device, a compound electroosmosis device and a compound EDI (Electronic Data Interchange) device. The invention provides the process and the device for processing heavy metal wastewater by using a compound membrane separation technique according to the characteristics of inverse penetration, electroosmosis and EDI, which can be used for effectively processing the processing heavy metal wastewater through experiment verification.

Description

technical field The invention relates to the wastewater treatment field, and relates to a process and a device for treating heavy metal wastewater, in particular to a process and equipment for treating heavy metal-containing wastewater with composite membrane technology. Background technique The rapid development of modern industry produces a lot of hazardous waste, such as waste water containing heavy metals, etc. If these waste water is discharged into the environment, it will cause serious damage to the ecology, so it must be treated. There are many enterprises that produce wastewater containing heavy metals, such as mining, smelting, electroplating, chemical industry and other industries, all of which may produce wastewater containing heavy metals. Taking electroplating as an example, it can generally be divided into wastewater containing chromium (Cr), wastewater containing nickel (Ni), wastewater containing cadmium (Cd), wastewater containing copper (Cu), wastewater co...

AI Technical Summary

Problems solved by technology

The advantage of using EDI alone to treat low-concentration wastewater is that the treatment effect is good, but the disadvantage is that the energy consumption is large and the adaptability of the membrane stack is poor.

Therefore, reverse osmosis, electrodialysis, and EDI are all defective in electroplating wastewater treatment alone, and electrodialysis or EDI alone cannot increase the concentration of wastewater to the concentration required by the electroplating tank.

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