System for enriching denitrifying anaerobic methane oxidation microorganisms and method thereof

Abstract

The invention provides a system for enriching denitrified anaerobic methane oxidized microorganisms and a method thereof. The system comprises a hollow fiber membrane reactor which comprises a shell, an upper flange arranged at the top end of the shell and a lower flange arranged at the bottom end of the shell. A water inlet is arranged on the lower part of the shell, a sampling opening is arranged in the middle, and a water outlet is arranged on the upper part. The upper flange is provided with an air outlet and the lower flange is provided with an air inlet. The shell is internally provided with a hollow fiber membrane beam which is closed at the upper end and opened at the lower end and is connected with the air inlet. A methane supply device is connected with the air inlet of the hollow fiber membrane reactor. A water supply device is connected with the water inlet of the hollow fiber membrane reactor. Through the system provided by the invention, inoculums are added. The system operates according to a sequence mode and a continuous flow mode, so that the utilization ratio of methane is improved, and the enriching time of denitrifying anaerobic methane oxidation microorganisms is shortened.

Description

technical field [0001] The invention relates to the technical field of denitrification, in particular to a system and method for enriching denitrifying anaerobic methane oxidation microorganisms. Background technique [0002] Denitrification, also known as denitrification, refers to the process in which nitrate nitrogen and nitrite nitrogen are reduced to nitrogen gas under the action of denitrifying bacteria. It is one of the main processes for denitrification in the field of sewage treatment. In the classic denitrification process, denitrifying bacteria use nitrogen oxides as electron acceptors and organic matter, namely carbon sources, as electron donors. Denitrifying anaerobic methane oxidation (DAMO) is a relatively new biological reaction in which DAMO microorganisms use nitrogen oxides as electron acceptors and methane as electron donors to convert the two into nitrogen respectively. and carbon dioxide. Methane is the main product of anaerobic fermentation. In the d...

AI Technical Summary

Problems solved by technology

Due to the low solubility of methane in the water phase and the small mass transfer coefficient, the mass transfer process of methane from the gas phase to the liquid phase, and then from the liquid phase to microorganisms is greatly restricted, resulting in prolonged enrichment time of microorganisms

Although the CSTR reactor is easy to operate and can achieve steady-state operation, it also provides methane by continuously blowing methane from the bottom of the reactor, so the mass transfer of methane is also limited, and the amount of leaked methane is relatively large

In addition, the CSTR reactor also has problems such as easy loss of microorganisms

Therefore, the current existing technology takes a long time to enrich DAMO microorganisms, which is not conducive to application

Images