Method for treating high-salt wastewater by using halophilic microorganisms

Abstract

The invention provides a method for treating high-salt wastewater by using halophilic microorganisms. The halophilic microorganisms can adapt to a high-salt environment to perform normal growth metabolism, and comprise haloduric and halophilic bacteria, yeasts, archaea and microfauna. The method for treating the high-salt wastewater by using the halophilic microorganisms comprises the following steps: adding a halophilic microbial flora into a biochemical system; performing mixed culture on the halophilic microbial flora in an influent salt concentration range of 1-25% to improve the pollution degradation capability of the halophilic microbial flora and obtain a halophilic microbial aggregate with good mud-water separation performance and precipitation performance, such as active sludge and a biomembrane; and stabilizing the process parameters and influent water quality of the biochemical system to ensure that the biochemical effluent reaches a standard or meets design requirements. By adopting the method provided by the invention, the high-salt wastewater with the influent salt concentration of 1-25% of the biochemical system can be subjected to biochemical treatment, and the halophilic microbial agent only needs to be added once, so that the investment and operation costs can be reduced.

Description

technical field [0001] The invention belongs to the technical field of high-salt wastewater treatment, and in particular relates to a method for treating high-salt wastewater by utilizing salt-suitable microorganisms. Background technique [0002] High-salt wastewater treatment methods mainly include physical and chemical methods, biochemical methods and their combined processes. Physical and chemical methods include evaporation, membrane separation, ion exchange, advanced oxidation, electrolysis, etc. No matter how advanced these technologies are, the main idea of ​​the treatment is to separate the inorganic salts in the wastewater first, and then make the desalted or diluted wastewater reach the standard; therefore , its investment cost and operating cost are very high, and the evaporated mother liquor, solid salt, and reverse osmosis concentrate produced by desalination are solid waste or hazardous solid waste. Although the operating cost of biochemical treatment of high...

AI Technical Summary

Problems solved by technology

Inoculation of halophilic bacteria can enhance the effect of ordinary biochemical systems on the treatment of high-salt wastewater. However, due to the high cost of obtaining halophilic bacteria through the steps of enrichment, screening, isolation, identification, and fermentation culture, it can only be used for laboratory research. mainly