Wastewater treatment and reusing membrane separation treatment technology

Abstract

The invention relates to a wastewater treatment and reusing membrane separation treatment technology which is characterized by treating heavy metal wastewater by using the pretreatment of 'preformed precipitation + fiber filter + ultrafiltration' and the membrane separation technology of 'nanofiltration + reverse osmosis + mixed bed', so that the treated wastewater can reach the boiler water standards, and equipment and electrified control is beneficial to accurately and safely controlling wastewater treatment equipment. In the invention, the purpose of real wastewater zero emission is realized by the application of the membrane technology, the reuse rate of wastewater reaches 75-80%, the rest wastewater is conveyed back to a regulating pool for continued circular treatment, metal ions are finally transported outwards or reused in the main form of sludge, and the possibility of affecting environment by heavy metal wastewater can be reduced as much as possible.

Description

technical field [0001] The invention relates to a membrane separation technology, in particular to precious metal recovery, precipitation separation, and waste water reuse processes, in particular to a membrane separation process for industrial waste water treatment in smelting enterprises. Background technique [0002] At present, there are three main types of heavy metal wastewater treatment methods in the world: the first type is the method of removing heavy metal ions in wastewater through chemical reactions, including neutralization precipitation method, sulfide precipitation method, ferrite co-precipitation method, chemical reduction method, Electrochemical reduction method and polymer heavy metal trapping agent method, etc. The second category is the method of adsorbing, concentrating, and separating heavy metals in wastewater without changing their chemical form, including adsorption, solvent extraction, evaporation and solidification, ion exchange, and membrane sepa...

AI Technical Summary

Problems solved by technology

For the above three categories of methods, the first category is highly targeted to heavy metals. If the wastewater contains a variety of heavy metals, the effect will be significantly weakened, and it is easy to cause secondary pollution of heavy metals; the second category has more treatment processes. It is cumbersome and troublesome; the cost of the third category is higher, and the processing cycle is longer, and it is easy to reduce the processing effect significantly in the case of continuous processing and large-scale processing