A biological deodorization method for malodorous solids from algal sources

Abstract

The invention relates to a method for biological deodorization of malodorous solids from algal sources. Several kinds of deodorizing bacteria are screened out from cyanobacteria symbiotic bacteria, and the pure species of the deodorizing bacteria are expanded and cultivated to obtain bacterial agents. For pretreatment, the bacteria agent is added to the pretreated malodorous solids of the algae source, so that the total concentration of viable bacteria is ≥10 5 pcs / ml, and then treated at a temperature of 18-40°C for 7-15 days, stirring during the treatment to keep the dissolved oxygen concentration >0.5 mg / L. The present invention has the advantages of being suitable for removing odorous substances in the malodorous solids of algae sources, conveniently applied to the treatment of algae slurry and algae mud that are currently salvaged in an emergency, and is conducive to maintaining macromolecular organic matter in algae sources, thereby satisfying the requirements of cyanobacteria solids. Subsequent high-value utilization requirements.

Description

technical field [0001] The invention relates to a biological deodorization method for malodorous solids of algal sources, belonging to the technical field of environmental protection. Background technique [0002] As far as the applicant knows, cyanobacteria Cyanobacteria It is a kind of algae commonly found in water bodies, with strong individual reproduction ability, buoyancy, and algal odor. In recent years, due to the aggravation of eutrophication in water bodies, blue-green algae have broken out in large areas in my country, especially when the water temperature exceeds 20°C, blue-green algae can be suspended and accumulated in large quantities on the coast of the water body and on the surface of the water body, and the large-scale breeding of blue-green algae not only It will cause hypoxia in the water body and a large number of fish deaths, and the ecological deterioration caused by the stench emitted by the death of cyanobacteria has a greater impact on people's dome...

AI Technical Summary

Problems solved by technology

[0003] However, the chemical oxidation deodorization method is not specific, such as hydrogen peroxide, sodium hypochlorite, potassium dichromate, ozone, potassium persulfate and other strong oxidants, which have the ability to oxidize all organic substances including odorous substances in the reaction system. Decomposition effect, if the content of organic matter in the reaction system is too high, it will not be applicable; the physical adsorption deodorization method does not transform the odorous substances, but only absorbs to reduce the odor concentration in the air or water to achieve the purpose of deodorization, and the odorous substances remain in the Adsorbents, and relying on adsorbents to remove high-concentration odorous substances is too expensive; physical masking and deodorization methods do not convert odorous substances, and physical masking and deodorization methods are not suitable for environments with high concentrations of odorous substances The biological deodorization method degrades odorous substances through the metabolic activities of microorganisms. However, for different odor breeding sources such as garbage, residual sludge from sewage plants, livestock and poultry manure, and blue-green algae, the use of deodorizing microorganisms cannot be completely universal. It is necessary to screen the corresponding deodorizing microorganisms according to different odor breeding substrates

[0004] In addition, since the chemical oxidation deodorization method is not selective for the oxidation of organic matter, a large number of macromolecular organic substances rich in cyanobacteria will also be oxidized and decomposed, which not only weakens the effect of removing odorous substances, but also makes the organic macromolecules of cyanobacteria The material is destroyed, which is not conducive to the subsequent high-value resource utilization of cyanobacteria-based bioplastics