Complex microbial inoculum applied in high-salinity organic wastewater and preparation method of complex microbial inoculum

Abstract

The invention discloses a complex microbial inoculum applied in high-salinity organic wastewater. The complex microbial inoculum is prepared from, by mass, 10-25% of salinicoccus sp, 10-25% of tetragenococcus halophilus, 10-25% of kangiella sp, 5-25% of sulfitobacter sp and 10-25% of bacillus sphaericus. The invention further discloses a preparation method of the complex microbial inoculum. The complex microbial inoculum can stably grow in the high-salinity environment, utilizes the metabolism of bacteria themselves for treatment, is green and environmentally friendly, and cannot cause secondary pollution to the environment, after the complex functional microbial inoculum is added, microorganisms can steadily increase, and after one week of stable operation, it is measured that the COD content is reduced from 869 mg / L to 38-52 mg / L; the ammonia nitrogen is reduced from original 68 mg / L to 1.08-1.65 mg / L, the COD content and ammonia nitrogen content in the high-salinity organic wastewater can be effectively reduced, the removal rate of COD in high-salinity printing and dyeing wastewater can reach 94% or above, and the removal rate of the ammonia nitrogen can reach 97% or above.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a composite bacterial agent applied to high-salt organic wastewater and a preparation method thereof. Background technique [0002] The discharge of saline wastewater has caused very serious environmental pollution. Saline wastewater is widely sourced from industrial production. In addition to being limited by its own high concentration of salt, it also contains a large amount of toxic and refractory organic matter. For these high-salinity refractory industrial wastewater, it is best to be treated separately in the sewage treatment station in industrial enterprises. If these wastewater is mixed or diluted with other industrial wastewater or domestic sewage containing easily biodegradable substrates, and discharged into municipal pipes, Microorganisms in urban sewage treatment plants preferentially metabolize the latter, and these toxic pollutants will be difficult to...

AI Technical Summary

Problems solved by technology

For these high-salinity refractory industrial wastewater, it is best to be treated separately in the sewage treatment station in industrial enterprises. If these wastewater is mixed or diluted with other industrial wastewater or domestic sewage containing easily biodegradable substrates, and discharged into municipal pipes, Microorganisms in urban sewage treatment plants preferentially metabolize the latter, and these toxic pollutants will be difficult to effectively remove

Generally, electrolysis, membrane separation and incineration are used to treat this kind of wastewater, but there are disadvantages of high cost or secondary pollution, so it is difficult to apply in practice

The existence of a large amount of inorganic salts has obvious inhibitory effect on conventional biological treatment, causing moderate inhibition and poisoning of biological metabolism, and making microorganisms lose their vitality