Waste emulsified liquid treatment process adopting combination of ultrasonic waves and electrocoagulation method

Abstract

The invention discloses a waste emulsified liquid treatment process adopting combination of ultrasonic waves and an electrocoagulation method. The waste emulsified liquid treatment process comprises the following steps that waste emulsified liquid is introduced into an ultrasonic treatment tank firstly, the PH value is adjusted to be 6-8, and the waste emulsified liquid is treated for several hours under the established ultrasonic frequency to be demulsified and degraded; and then the waste emulsified liquid is filtered and then pumped into an electrolytic cell, meanwhile, electrolyte sodium chloride is added, the PH value of the waste emulsified liquid is adjusted to be 5.5-6.5, the electrolytic cell is electrified, after electrolytic reaction, static settlement is conducted for one hour,then suspension oil on the liquid level is scraped off, and supernatant liquid is treated drained water. According to the waste emulsified liquid treatment process adopting combination of the ultrasonic waves and the electrocoagulation method, the treatment efficiency of the subsequent electrocoagulation method is improved through the good demulsifying and degrading effects of the ultrasonic waves at a certain frequency band on the emulsified liquid.

Description

technical field [0001] The invention relates to a waste emulsion treatment process combining ultrasonic wave and electrocoagulation method. Background technique [0002] Since the electrocoagulation method was proposed in the early 20th century, it has been widely used in the treatment of various industrial wastewater. The reaction principle of electrocoagulation is to use metals such as aluminum and iron as the anode. Under the action of direct current, the anode is eroded to produce Al and Fe plasma. After a series of hydrolysis, polymerization and oxidation of ferrous iron, it develops into various hydroxyl groups. Complexes, polynuclear hydroxyl complexes and even hydroxides, so that colloidal impurities and suspended impurities in wastewater coagulate and precipitate and separate. At the same time, charged pollutant particles swim in the electric field, and part of their charges are neutralized by the electrodes. Promote its destabilization and aggregation. [0003] W...

AI Technical Summary

Problems solved by technology

[0007] Air flotation coagulation + biochemical treatment adopts air flotation, coagulation and sedimentation, and enters the biochemical treatment system together with other wastewater. Due to the low degreasing efficiency of the emulsion, petroleum substances have a strong inhibitory effect on the biochemical system, and the mixed wastewater Often shocking and toxic effects on biochemical systems

This process is the earliest process for waste emulsion treatment. It was used in the early iron and steel industry and metal cutting industry. However, with the increase in the types of emulsions in factories and the continuous improvement of environmental protection standards, this process is no longer used.