Current and recent organophosphorus pesticide wastewater treatment methods of evaluation in the future, the preferred method of treatment of organophosphorus pesticide wastewater, the first is the activated carbon adsorption, the second is the activated sludge method, after the wastewater treatment with plenty of water dilution, into the river, has no effect on organisms.
The activated carbon adsorption method is suitable for the clear packaging containers, equipment and the waste water to wash the ground, as well as the waste water of the farm treatment and cleaning pesticide packaging container.
Analyzing various organophosphorus pesticide factories discharge wastewater in China, more than 95% of the organic phosphorus compounds in wastewater are not pesticide ontology, but their intermediates and different stages of degradation products.
Organophosphorus compounds in place will happen in the process of hydrolysis, part of the disulfide in the generation of phosphate phosphorus sulfur bond rupture, organophosphorus concentration increased significantly, the adsorption of water breakthrough point in advance, but sulfur adsorption is the same as the fresh water. Initial stage from the analysis results indicate that the adsorption, adsorption of organic matter mainly methanol and water - methylamine, BOD/COD ratio above 0.8, organic phosphorus is by sulfur phosphorus gradually from low to high flow ratio, trimethyl, dimethoate and other molecular weight and the polarity of minor compounds in the activated carbon is close to saturation.
It can also improve the biochemical treatment effect of the effluent effluent by direct injection of powdered activated carbon into the biochemical treatment pond. The removal rate can be increased by about 20% when the amount of input is 0.1%. However, the waste water discharged from each ton of legume oil needs 0.8-1t activated carbon powder. The cost is also very large, and the recycling and regeneration methods of carbon powder have not been solved yet, and there are still problems in industrial application. Although it is in the process of handling expenses, in some special cases, such as when the water of life is polluted by organophosphorus pesticides, the temporary use of activated carbon adsorption is effective and convenient.
The application of adsorption method in domestic organophosphorus pesticide production plant is not much, because the organic phosphate ester in wastewater has strong polarity and water solubility, and the treatment effect of general adsorbent is not good. However, when the waste water contains another condensation, it is very fat soluble, and it is difficult to biodegrade compounds such as halogenated sutras. Halogenated phenol can be considered by flocculation, adsorption or pawn removal. For example, there are more difficult biodegradable o-chlorophenol in the waste water of propyl bromide, and the commonly used inorganic flocculant can be removed effectively. The pawn method can also be used.