Treatment method of waste water containing organic phosphorus

Abstract

The invention relates to a treatment method of waste water containing organic phosphorus, comprising the following steps: leading process waste water containing organic phosphorus to pass through a sand filtration tank for removing suspended matter and then adjusting the pH value thereof to 3-4; leading the process waste water to pass through a high-efficient catalytic oxidation apparatus, adding hydrogen peroxide for conducting oxidative degradation of the process waste water; then introducing the process waste water to a catalytic micro-electrolysis device, adding scrap iron and activated carbon and stirring, conducting electrochemical reaction, blasting air into the lower part of the catalytic micro-electrolysis device, and removing hard-degradable organic matter in the process waste water; and introducing the effluent of the catalytic micro-electrolysis device into an oxidation kettle, adding hydrogen peroxide for conducting multistage oxidation treatment, later adding lime, adjusting the pH value of the process waste water to 8-9, then adding flocculant for conducting precipitation, and forming ironic phosphate and calcium phosphate precipitate, thus removing phosphorus in the waste water. Compared with the prior art, the treatment method transforms the organic phosphorus into inorganic phosphorus for removal and has high removal rate of total phosphorus and low running cost, and the formed phosphate can be recycled and reused.

Description

technical field [0001] The invention relates to a method for treating wastewater, in particular to a method for treating organic phosphorus-containing wastewater. Background technique [0002] Pesticide industry is one of the main industries of my country's chemical industry. 80% of my country's pesticide products are organophosphorus pesticides. The main products are: trichlorfon, dichlorvos, dimethoate, methamidophos, glyphosate, etc. Due to the wide variety of production, complex production process, and large discharge of "three wastes", it is estimated that about 3-4 tons of chemical raw materials are consumed for every ton of pesticide synthesized, and most of these redundant chemical raw materials are discharged as unreacted substances or by-products. If obtained If it is not effectively treated, it will cause serious pollution to the environment. Organophosphorus pesticide wastewater has complex components, high concentration, and strong toxicity, which has caused gr...

AI Technical Summary

Problems solved by technology

Most of my country adopts the traditional biochemical method, which is suitable for treating low-concentration phosphorus-containing wastewater, while high-concentration organic phosphorus wastewater must undergo physical and chemical pretreatment before entering the biochemical treatment system. Pretreatment generally adopts primary oxidation + coagulation treatment. However, this method has little chance of converting organic phosphorus into inorganic phosphorus, and the total phosphorus index of the effluent after treatment is not ideal.