Sewage treatment method using micro-aerobic autotroph to remove nitrogen

Abstract

The invention discloses a sewage treatment method using micro-aerobic autotroph to remove nitrogen. The method comprises the following steps of 1. carrying out micro-aerobic oxidizing on organic matters in sewage, and meanwhile realizing partially synchronous nitrification, denitrification and nitrosification; 2. strictly controlling dissolved oxygen, proportionally converting ammonia nitrogen into nitrite nitrogen, and making the ratio of the ammonia nitrogen to the nitrite nitrogen in the discharged sewage approach to 1; and 3. enriching the anaerobic ammonia oxidation bacteria, and ensuring that the ammonia nitrogen and the total nitrogen in the discharged sewage reach standards. The method has the advantages that the existing urban sewage with low carbon-nitrogen ratio and the sewage with high ammonia nitrogen ratio can be treated highly efficiently, the technology is simple, the operation is convenient, the method is suitable for large-scale engineering, and the good economical, social and environmental benefits are realized.

Description

Technical field [0001] The invention relates to a sewage treatment method for real-time micro-aerobic autotrophic high-efficiency biological nitrogen removal by regulating DO according to the ammonia nitrogen content in the sewage. Background technique [0002] With the rapid development of modern economy, the discharge of industrial wastewater and urban sewage with high concentration of ammonia nitrogen has increased, especially the inflow of large amounts of ammonia nitrogen and total nitrogen into water bodies, causing frequent outbreaks of algal blooms in water bodies, seriously disrupting the environmental balance and causing The continuous environmental and resource disasters have also caused great losses to the economy and society, and threatened people's lives. At present, most domestic and foreign biochemical methods are used to treat ammonia nitrogen wastewater, but the traditional biological denitrification mechanism requires microorganisms to undergo nitrification and...

AI Technical Summary

Problems solved by technology

However, because nitrosifying bacteria are more sensitive to the process conditions of dissolved oxygen, they are at a disadvantage in competition with nitrifying bacteria, while anammox bacteria have higher requirements on the amount of nitrite and ammonia nitrogen, and their growth rate is extremely slow, so their cultivation and proliferation are relatively low. Therefore, although the new theory of biological denitrification has been recognized, the new technology is still in the stage of theoretical research, and the method of realizing microautotrophic biological denitrification has not been reported.

Images