Glyphosat is widely applied as a herbicide. Existing glyphosat herbicide production is mainly based on IDAN and dimethyl synthesis. Generally, one ton of glyphosat produces roughly 5 to 6 tons of crystallization mother solution which contain 1 %-2% of glyphosat, 3%-4%of Glyphosine, 1% of phosphite, inorganic chlorinated solvent and certain amount of triethylamine. The total salinity can reach 15%-20% and pH is less than 1.
Glyphosat herbicide wastewater had long been an innegligible environmental pollution source, but its treatment is still a challenge for every herbicide manufacture. Initially, nano membrane separations technology was recommended to treatment and reuse the crystallization mother solution. But a series of treatablilty tests indicated that although nano membrane separations technology can desalinize and concentrate mother solution, its low adaptability, high operating cost and member pollution stops its application from industrial mass production.
Our self-developed electromagnetic-field oxidation system can degrade glyphosat herbicide wastewater much effectively. Target on characteristic of less degradable COD in glyphosat herbicide wastewater, electromagnetic-field oxidation system can oxidize the organophosphorus compound into phosphite in the help of certain oxidants. This technology can remove organic compounds completely and does not produce by-products.
This technology can decrease total phosphorus in glyphosat herbicide wastewater dramatically. total phosphorus in output water decrease from 9400mg/L to 400mg/L, whose removal rate can approach 96%. The treated water can meet the discharge requirement. The solid waster residue in this treatment is filterable, which can be filter by normal filters and be turn into filter cakes with less than 40% water.
This technology features easy-to-operation, low cost and high treatment effectiveness, long longevity and erosion resistance. It is the best solution for glyphosat herbicide wastewater treatment nowadays. |
