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Recent Patents on Biotechnology


ISSN (Print): 1872-2083
ISSN (Online): 2212-4012

Membrane Aerated Biofilm Reactors: A Brief Current Review

Author(s): Tinggang Li, Junxin Liu and Renbi Bai

Volume 2, Issue 2, 2008

Page: [88 - 93] Pages: 6

DOI: 10.2174/187220808784619739

Price: $65


Membrane aerated biofilm reactors (MABRs) represent a relatively new biotreatment technology. In a MABR, biofilm is grown on a gas-permeable membrane (often a hollow fiber membrane). Soluble organic compounds in the liquid are supplied to the biofilm from the biofilm-liquid interface whereas oxygen supply to the biofilm is from the biofilm-membrane interface (by oxygen diffusing through the membrane). MABRs can achieve bubble-less aeration and high oxygen utilization efficiency (up to 100%) and the biofilm can be stratified into aerobic/anoxic/anaerobic zones to simultaneously achieve removal of carbonaceous organic pollutants as well as nitrification and denitrification (if needed) in a single biofilm. This article briefly reviews the MABR process, including the characteristics, membrane materials, modular design, operation parameters and the potential applications, from relevant recent patents and literature.

Keywords: Membrane aerated biofilm reactors, bubble-less aeration, biofilm stratification, membrane meterials and modules, applications

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