Accelerant facilitating growth of salt-resistive nitrifying bacteria in high-salt wastewater

Abstract

The invention discloses an accelerant facilitating the growth of salt-resistive nitrifying bacteria in high-salt wastewater. The accelerant comprises 30-40g sodium chloride, 0.2-0.6g ammonium sulfate, 0.01-0.05g magnesium sulfate heptahydrate, 0.8-1.5g dipotassium phosphate, 0.01-0.05g ferrous sulfate, 7-8.2g calcium chloride, 1-1.7g sodium bicarbonate, 0-0.5g sodium nitrite, 1-5ml vitamin liquid, 1-5ml trace element solution, and 5-10ml bacterium solution per 1000ml water, wherein pH (potential of hydrogen) is 7.8. The accelerant facilitating the growth of the salt-resistive nitrifying bacteria in the high-salt wastewater is free of organic matters such as sugar, contains the inoculated bacterium solution, is suitable for being directly put into the high-salt wastewater for use in an ammonia nitrogen removal technology by a biological method, and allows the high-salt wastewater to be capable of quickly having an environment appropriate for the growth of the salt-resistive nitrifying bacteria. Under the condition that other conditions are the same, after the accelerant is used, a removal rate of ammonia nitrogen can be increased by above 25%, and the accelerant meets requirements on removal of ammonia nitrogen from the high-salt wastewater by a biochemical method.

Description

technical field [0001] The invention relates to the field of wastewater microbial treatment, in particular to an accelerator for the growth of salt-tolerant nitrifying bacteria used for removing ammonia nitrogen in high-salt wastewater by biological methods. Background technique [0002] Excessive ammonia nitrogen content in water is one of the main causes of eutrophication in rivers, lakes and other water bodies. The most economical and commonly used method for the removal of ammonia nitrogen in water is biological method. The biological method to remove ammonia nitrogen is mainly to convert ammonia nitrogen into nitrite through nitrifying bacteria under aerobic conditions. Most nitrifying bacteria are chemoautotrophic, have a long generation time, slow growth rate, and are sensitive to salinity, which makes it difficult to remove ammonia nitrogen in high-salt wastewater by biological methods. After searching, it is found that the Chinese invention patent with the applica...

AI Technical Summary

Problems solved by technology

However, there is no disclosed promoter that can be directly put into high-salt wastewater to facilitate the growth of salt-tolerant nitrifying bacteria.