CMABR (carbon tube membrane-aerated biofilm reactor) for running single-stage autotrophic biological nitrogen removal process

Abstract

A CMABR for running single-stage autotrophic biological nitrogen removal process belongs to the technical field of water treatment equipment. A membrane module of the CMABR is formed by vertically arranging multi-millipore carbon tube membranes at equal intervals; each carbon tube is wrapped by non-woven fabrics and microorganisms attach to filling of the non-woven fabrics; an air pump is adopted to pump air from bottom end of the membrane module into internal cavities of the carbon tube membranes and part of air enters the CMABR through walls of the carbon tube membranes and the rest air is vented from the other end; and the pressure of the internal cavities of the carbon tube membranes can be controlled by regulating a gas flow meter to regulate oxygen supply so as to further control dissolved oxygen inside the CMABR. The CMABR has the effects of high-effective oxygen mass transfer rate, huge biofilm carrier specific surface area and internal-external layered special biofilm structure, and easily achieves operation parameter required by the running of single-stage autotrophic biological nitrogen removal process. The CMABR is applicable to the single-stage autotrophic biological nitrogen removal process and is a novel biological nitrogen removal reactor with wide market application prospect.

Description

technical field [0001] The invention belongs to the technical field of water treatment equipment and relates to a carbon tube membrane aerated biofilm reactor operating a single-stage autotrophic biological denitrification process. Background technique [0002] The discovery of a brand-new biological reaction, anaerobic ammonia oxidation (ANAMMOX), in the late 1980s provided a theoretical basis for the research and development of a single-stage autotrophic biological denitrification process. It can use anammox bacteria to use nitrite as an electron acceptor and ammonia as an electron donor to generate nitrogen. Due to the anaerobic ammonium oxidation reaction, it can shorten the nitrification process, reduce oxygen demand and alkalinity consumption, and reduce the generation of excess sludge. The advantages of reducing the amount and saving operating costs have attracted widespread attention. The related single-stage autotrophic nitrogen removal process has become a research...

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Problems solved by technology

In addition, the growth of microorganisms on the aeration membrane wall can easily cause the problem of pore blockage

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