Device and method for achieving autotrophic nitrogen removal of low-carbon/nitrogen-ratio sewage based on partial denitrification and anaerobic ammonia oxidation

Abstract

The invention discloses a device and method for achieving autotrophic nitrogen removal of low-carbon/nitrogen-ratio sewage based on partial denitrification and anaerobic ammonia oxidation; the device includes a domestic sewage inlet tank, a partial denitrification reactor, an intermediate water tank and an anaerobic ammonia oxidation reactor; the domestic sewage inlet tank is connected with a first water inlet of the partial denitrification reactor through a first peristaltic pump; a first water outlet of the partial denitrification reactor is connected with the intermediate water tank through a second peristaltic pump; the intermediate water tank is connected with a second water inlet of the anaerobic ammonia oxidation reactor through a third peristaltic pump. The invention provides the device and method for achieving autotrophic nitrogen removal of the low-carbon/nitrogen-ratio sewage based on partial denitrification and anaerobic ammonia oxidation, and 50% of the aeration amount can be reduced; an anaerobic ammonia oxidation reaction is a redox reaction, the process is an autotrophic reaction, and thus 100% of a carbon source is reduced; anaerobic ammonia oxidation bacteria are autotrophic bacteria, the specific growth rate is extremely low, the surplus sludge volume is extremely low, and thus the cost of sludge treatment is saved.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, in particular to a device and method for realizing autotrophic denitrification of sewage with a low carbon-to-nitrogen ratio based on partial denitrification-anammox oxidation. Background technique [0002] For the denitrification treatment of domestic sewage with low carbon-to-nitrogen ratio, the traditional method is often realized through the process of nitrification / denitrification, which consumes a lot of energy and has high operating costs. The anaerobic ammonium oxidation reaction process refers to the reaction of NH under anaerobic or anoxic conditions. 4 + -N as an electron donor, the NO 2 - -Biological process of N reduction to nitrogen gas. Compared with the traditional denitrification process, the anammox denitrification technology has the following advantages: it can reduce the aeration rate by 50%; the process is an autotrophic reaction, which reduces the car...

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Problems solved by technology

[0004] The purpose of the present invention is to address the defects of low carbon nitrogen ratio domestic sewage denitrification treatment, such as more carbon sources added ...

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