Recovery processing technique for organic waste water of plating pretreatment

Abstract

The invention discloses a recovery and treatment technique for treating organic wastewater before electroplating. The technique comprises: the PH value of the organic wastewater is adjusted and the PH value is controlled within the scope of 7 to 9; the effluent of the former step is carried out pre-aerobic treatment and a way of biological selection is used for causing microorganisms to have an adaptive effect on the wastewater; a membrane bioreactor is used for treating the effluent of the former step to realize solid-liquid separation; a reverse osmosis membrane recycling system is used forcarrying out reverse osmosis treatment on the effluent of the former step in order to be in accordance with the requirements of a recycling galvanization rinsing water. The technology combines the traditional biological wastewater treatment technology into the treatment of treating the organic wastewater before the electroplating, which can realize the removal of the organisms that can not be degradated by chemical method.

Description

Recycling and treatment process of organic wastewater before electroplating technical field The invention relates to a waste water recovery process, in particular to a recovery process for treating organic waste water before electroplating. Background technique The treatment methods of electroplating wastewater can be divided into four categories according to their properties: physical method, chemical method, physical chemical method and biological method. At present, the commonly used treatment methods include chemical precipitation method, ion exchange method, electrolysis method, membrane separation method, evaporative crystallization, etc. The key technology of electroplating wastewater treatment lies in the separation and flow treatment. The chemical treatment measures of divide and conquer are adopted according to the difference in pH value, oxidation and reduction properties of its precipitation. For example, the recovery of acid copper and nickel by membrane recov...

AI Technical Summary

Problems solved by technology

The present invention provides a recovery and treatment process for pre-electroplating organic wastewater, the main purpose of which is to overcome the fact that a large amount of organic pollutants in the pre-electroplating wastewater are difficult to be removed by chemical enhanced degradation and remain in the wastewater after chemical treatment. Disadvantages that are barriers to increased recovery in membrane recovery systems