Double-sulfur-process autotrophic denitrifying nitrogen removal method and double-sulfur-process autotrophic denitrifying tank

Abstract

The invention discloses a double-sulfur-process autotrophic denitrifying nitrogen removal method and a double-sulfur-process autotrophic denitrifying tank. A liquid sulfur source and a solid sulfur source are respectively added into the sulfur autotrophic denitrifying tank, sewage enters the sulfur autotrophic denitrifying tank from a water inlet pipe, autotrophic denitrifying bacteria respectively take the liquid sulfur source and the solid sulfur source as electron donors to carry out a liquid-liquid mass transfer denitrifying reaction and a solid-liquid mass transfer denitrifying reaction,purified water obtained after the denitrifying reaction is finished is discharged from a water outlet, a nitrification tank comprises a tank body, the water inlet pipe, a liquid sulfur source dosing pipe and a solid sulfur source bed, two ends of the tank body are provided with a water inlet and the water outlet, the water inlet pipe and the liquid sulfur source dosing pipe are communicated with the water inlet of the tank body, and the solid sulfur source bed is fixedly mounted in the tank body and completely covers the cross section of a sewage flow channel in the tank body. Nitrates can beeffectively and quickly removed, the sulfur autotrophic denitrifying process of the rear section can be continuously and stably carried out, and the nitrate concentration and the COD concentration ofeffluent are ensured to not exceed standards.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a disulfide autotrophic denitrification method and a disulfide autotrophic denitrification pond. Background technique [0002] Sulfur autotrophic denitrification is a process that can convert sulfur as electron donor and nitrate as electron acceptor to sulfate and nitrogen respectively. Since sulfur is abundant in nature and cheap, and the process is a chemoautotrophic reaction with low sludge yield, sulfur autotrophic denitrification is a more economical method for nitrogen removal. At present, most of the sulfur autotrophic denitrification reactions stay in the reaction using elemental sulfur as the sulfur source. Since the elemental sulfur in the elemental sulfur denitrification process will not be released excessively, it can form an adaptive resistance to the fluctuation of influent water quality. Fluctuation ability to ensure that the nitrate concentration and...

AI Technical Summary

Problems solved by technology

In the coupling reaction system of heterotrophic denitrification and sulfur autotrophic denitrification, the two types of microbial communities will form space competition in the same space. Due to the slow reproduction speed of sulfur autotrophic denitrifying bacteria, they are often excluded due to the strong growth of other microorganisms. Deleted, so that the entire denitrification system cannot be maintained for a long time

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