The Study For Treating Glyphosate Wastewater By Electrocoagulation

Glyphosate is widely used as a herbicide, its production and consumption are the biggest in the world of pesticides, and glyphosate’s export volume is the highest in Chinese pesticides. Now the main domestic production of glyphosate is Glycine and IDA. In the process of glyphosate production will discharge a large amount of wastewater, the common characteristics of these water are high concentrations of pollutants, high salinity, degradation resistant, toxicity, and so on.This paper studies electrocoagulation technology to treatment G wastewater which is discharged by Glycine glyphosate production and Total drainage which has been treated by other technologies. Using a set of electrocoagulation equipment to analyze different electrode materials application situation in two kinds of wastewater, and analyze the factors such as electric current intensity, electrode plate distance, reaction time and pH of raw water how to impact the removal efficiency of COD and TP. Could provide a certain reference basis for the electrocoagulation technology in the application of the glyphosate wastewater processing.The result shows that aluminum electrode is better than iron electrode in treatment of Glycine glyphosate wastewater, using COD and TP removal efficiency as the reference, the best electric current intensity is 1.5A(8.52mA/cm2), the best electrode distance is 10 mm, the best reaction time is 15 min, the best raw water pH is 7.0. In the best technology conditions, the COD removal efficiency is 70.28% and TP is 73.11%, the discharge water has no color and has a little of suspended solids, has a well treatment efficiency.The result shows in Total drainage electrocoagulation with iron electrode has a better processing efficiency than aluminum electrode, and the best technology conditions are as follow: the electric current intensity is 1.0A(5.68mA/cm2), electrode distance is 17 mm, the reaction time is 30 min and the raw water pH is 5.0. In the best conditions, the COD removal efficiency is 70.63% and TP removal efficiency is 91.39%, the discharge water is transparent after precipitation, has no obvious suspend solids, has a good processing effect but produce more sludge.Using infrared scanner to analyze the sludge produced by electrocoagulation, it can deduce the electric flocculation is the main way to remove the water pollutants. Aluminum electrocoagulation processes a ton of G glyphosate wastewater with 0.67KW·h electric power consumption, and iron electrocoagulation handles a ton of total drainage with 1.06KW·h electric power consumption. Although after dealing with the electrocoagulation, the discharge water haven’t reach the national standard, has got a lot of improvement, it shows that electrocoagulation technology has a great application space in the early period of wastewater treatment or in the end of wastewater treatment.