Membrane-Aerated Biofilm Reactor (MABR) Demonstration at Ejby Mølle WRRF

Uri, Nerea; Constantine, T. A.; Sandino, Julián; Willoughby, A. B.; Nielsen, Per Henning

doi:10.2175/193864718824940673

Cited by 1 publication

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“…The MAB thickness in hybrid systems is often thinner, and less biofilm control is generally needed. This occurs because the suspended growth in the bulk liquid consumes soluble COD, thereby minimizing heterotrophic growth in the biofilm (Downing et al 2010;Uri et al 2018). Biofilm thickness does respond to temperature and operational conditions.…”

Section: Biofilm Thickness Controlmentioning

confidence: 99%

Recent progress using membrane aerated biofilm reactors for wastewater treatment

Wagner

Carlson

et al. 2021

Water Science and Technology

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The membrane biofilm reactor (MBfR), which is based on the counter diffusion of the electron donors and acceptors into the biofilm, represents a novel technology for wastewater treatment. When process air or oxygen is supplied, the MBfR is known as the membrane aerated biofilm reactor (MABR), which has high oxygen transfer rate and efficiency, promoting microbial growth and activity within the biofilm. Over the past few decades, lab-scale studies have helped researchers and practitioners understand the relevance of influencing factors and biological transformations in MABRs. In recent years, pilot- to full-scale installations are increasing along with process modeling. The resulting accumulated knowledge has greatly improved understanding of the counter-diffusional biological process, with new challenges and opportunities arising. Therefore, it is crucial to provide new insights by conducting this review. This paper reviews wastewater treatment advancements using MABR technology, including design and operational considerations, microbial community ecology, and process modeling. Treatment performance of pilot- to full-scale MABRs for process intensification in existing facilities is assessed. This paper also reviews other emerging applications of MABRs, including sulfur recovery, industrial wastewater, and xenobiotics bioremediation, space-based wastewater treatment, and autotrophic nitrogen removal. In conclusion, commercial applications demonstrate that MABR technology is beneficial for pollutants (COD, N, P, xenobiotics) removal, resource recovery (e.g., sulfur), and N2O mitigation. Further research is needed to increase packing density while retaining efficient external mass transfer, understand the microbial interactions occurring, address existing assumptions to improve process modeling and control, and optimize the operational conditions with site-specific considerations.

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Section: Biofilm Thickness Controlmentioning

confidence: 99%