Pesticide wastewater dephosphorizing agent

Abstract

The invention discloses a pesticide wastewater dephosphorizing agent which is a mixture. The mixture comprises a compound medicament, a flocculating agent and a water aqua according to the weight ratio of 25 : (0.5-1.5) : 250. According to the production process, raw materials and the like of the phosphorus containing pesticide, the characteristic of wastewater and the form of phosphate are analyzed, optimal pharmacy prescription is screened aiming at the nature difference of inorganic phosphorus and organic phosphorus, and ferric salt, aluminium salt, hydrogen peroxide, hydrogen peroxide and polyacrylamide are adopted to form the compound medicament integrating an efficient complexing agent, an oxidizing agent, an adsorbing agent and the flocculating agent as a whole, and the total phosphorus content of pesticide wastewater is greatly reduced. The pesticide wastewater dephosphorizing agent has the characteristics that the investment cost is lower, the operating cost is saved, and the generated sludge quantity is less, the effluent of the organic phosphorus pesticide wastewater treated through the dephosphorizing agent can reach the standard request of being lower than 1 mg/L, and the pesticide wastewater dephosphorizing agent has important significance on stable operation of pesticide industry production.

Description

technical field [0001] The invention belongs to the field of pesticide wastewater treatment, in particular to a pesticide wastewater phosphorus removal agent. Background technique [0002] In recent years, my country's pesticide industry has developed rapidly, and its annual production capacity has reached more than 1.5 million tons. The total output ranks first in the world, and it is a major pesticide exporter. Shandong, Jiangsu, and Zhejiang are the top three pesticide production areas in my country. Through the prevention and control of pesticides, 54 million tons of grain losses have been recovered every year across the country. As a substitute for organochlorine pesticides, organophosphorus pesticides are currently widely used at home and abroad because of their high efficiency, broad spectrum, and low residue. They are currently the most widely used pesticides. The national "Twelfth Five-Year Plan" pointed out that it is necessary to implement major demonstration pr...

AI Technical Summary

Problems solved by technology

At present, some domestic and foreign incineration methods are used to treat high-concentration organophosphorus pesticide wastewater, but this method has high cost, high energy consumption, and is prone to produce secondary pollutants such as waste residue and waste gas, causing environmental hazards, and it is difficult for the effluent to reach the national level. standard

In addition, there are also chemical methods, such as single dosing of metal salts to remove phosphorus, but the disadvantage is that the cost of chemicals is significantly higher than that of biological phosphorus removal systems that rarely add chemicals, and the amount of sludge produced is significantly greater than that of treatment systems that do not add chemicals. It may cause the existing sludge treatment system to be overloaded, and the sludge treatment and disposal costs will increase accordingly, and the dewatering performance of the generated sludge is not as good as that of conventional water treatment plants without chemicals

[0004] For the treatment of pesticide wastewater, at present, there are many domestic patents, but most of them focus on inorganic phosphorus pesticide wastewater

Most of the existing organic phosphorus pesticide wastewater phosphorus removal agents are difficult to prepare, the dosage is large, and the phosphorus removal efficiency is not high, and they are mostly used to treat low-concentration wastewater