Method for preparing pure biomass organophosphorus pesticide degradation agent

Abstract

The invention discloses a method for preparing a pure biomass organophosphorus pesticide degradation agent and belongs to the field of pesticide degradation agents. According to the method, a large number of organophosphorus pesticide degrading bacteria are cultured, separated and screened out from mixed soil of earth surface sludge, activated sludge and common earth surface soil; hypha suspension liquid, humus and chitosan are mixed and aged to obtain a pasty mixture; and the pasty mixture, nano titanium dioxide and a garlic extract concentrated solution are mixed and pelletized. The organophosphorus pesticide degrading bacteria screened and acclimatized through the method have high degradation activity, and the temperature and pH applicable range is wide; the pure biomass organophosphorus pesticide degradation agent is combined with substances such as humic acid and can degrade organophosphorus pesticide more thoroughly and faster; allicin and alliin in the garlic extract concentrated solution have a degradation effect on the organophosphorus pesticide; degradation of the pesticide can be accelerated through photocatalysis of the nano titanium dioxide; moreover, the prepared pure biomass degradation agent is non-toxic, has no residues and is free of secondary pollution.

Description

technical field [0001] The invention discloses a preparation method of a pure biomass organophosphorus pesticide degradation agent, belonging to the field of pesticide degradation agents. Background technique [0002] A large number of studies have shown that the continuous use of a certain pesticide will cause the degradation rate of this pesticide in the soil to accelerate. It has been confirmed that the cause of this phenomenon is mainly caused by microorganisms that can degrade pesticides, and the ability of these microorganisms to degrade pesticides is partly inherent and partly induced by the use of pesticides. Soil microorganisms include bacteria, fungi, actinomycetes, algae, etc., which can degrade pesticides. Bacteria play a major role in the microbial degradation of pesticides because of their biochemical adaptability and the ability to easily induce mutations. Pesticide-degrading bacteria in soil are not special microorganisms, they are widely distributed in soi...

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is that the degradation speed of biomass pesticide-degrading bacteria directly screened from the environment is slow, and the fluctuations of temperature, pH and humidity are also large, and frequent mutations lead to the loss of degradation ability and the inability to continue to degrade pesticides. Problem, provide a kind of preparation method of pure biomass organophosphorus pesticide degradation agent, the present invention cultivates, separates and screens out a large amount of organophosphorus pesticide degrading bacteria from the mixed soil of surface sludge, activated sludge and common surface soil, and bacteria The silk suspension is mixed with humus and chitosan and aged to obtain a pasty mixture. The pasty mixture is mixed with nano-titanium dioxide and garlic extract concentrate and granulated. High degradation activity, wide adaptability to temperature and pH, combined with humic acid and other substances, it can degrade organophosphorus pesticides more thoroughly and quickly, among which allicin and alliin in garlic extract concentrate Pesticides have a degradation effect, and the photocatalytic properties of nano-titanium dioxide can also accelerate the degradation of pesticides, and the prepared pure biomass degradation agent is non-toxic, has no residue, and has no secondary pollution