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Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment

Membrane biofilm development was evaluated to improve psychrophilic (15°C) anaerobic membrane bioreactor (AnMBR) treatment of domestic wastewater. An AnMBR containing three replicate submerged membrane housings with separate permeate collection was operated at three levels of membrane fouling by ind...

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Detalles Bibliográficos
Autores principales: Smith, Adam L, Skerlos, Steven J, Raskin, Lutgarde
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4554476/
https://www.ncbi.nlm.nih.gov/pubmed/26238293
http://dx.doi.org/10.1111/1751-7915.12311
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author Smith, Adam L
Skerlos, Steven J
Raskin, Lutgarde
author_facet Smith, Adam L
Skerlos, Steven J
Raskin, Lutgarde
author_sort Smith, Adam L
collection PubMed
description Membrane biofilm development was evaluated to improve psychrophilic (15°C) anaerobic membrane bioreactor (AnMBR) treatment of domestic wastewater. An AnMBR containing three replicate submerged membrane housings with separate permeate collection was operated at three levels of membrane fouling by independently controlling biogas sparging for each membrane unit. High membrane fouling significantly improved permeate quality, but resulted in dissolved methane in the permeate at a concentration two to three times the equilibrium concentration predicted by Henry’s law. Illumina sequencing of 16S rRNA targeting Bacteria and Archaea and reverse transcription-quantitative polymerase chain reaction targeting the methyl coenzyme-M reductase (mcrA) gene in methanogens indicated that the membrane biofilm was enriched in highly active methanogens and syntrophic bacteria. Restoring fouled membranes to a transmembrane pressure (TMP) near zero by increasing biogas sparging did not disrupt the biofilm’s treatment performance, suggesting that microbes in the foulant layer were tightly adhered and did not significantly contribute to TMP. Dissolved methane oversaturation persisted without high TMP, implying that methanogenesis in the biofilm, rather than high TMP, was the primary driving force in methane oversaturation. The results describe an attractive operational strategy to improve treatment performance in low-temperature AnMBR by supporting syntrophy and methanogenesis in the membrane biofilm through controlled membrane fouling.
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spelling pubmed-45544762015-09-04 Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment Smith, Adam L Skerlos, Steven J Raskin, Lutgarde Microb Biotechnol Research Articles Membrane biofilm development was evaluated to improve psychrophilic (15°C) anaerobic membrane bioreactor (AnMBR) treatment of domestic wastewater. An AnMBR containing three replicate submerged membrane housings with separate permeate collection was operated at three levels of membrane fouling by independently controlling biogas sparging for each membrane unit. High membrane fouling significantly improved permeate quality, but resulted in dissolved methane in the permeate at a concentration two to three times the equilibrium concentration predicted by Henry’s law. Illumina sequencing of 16S rRNA targeting Bacteria and Archaea and reverse transcription-quantitative polymerase chain reaction targeting the methyl coenzyme-M reductase (mcrA) gene in methanogens indicated that the membrane biofilm was enriched in highly active methanogens and syntrophic bacteria. Restoring fouled membranes to a transmembrane pressure (TMP) near zero by increasing biogas sparging did not disrupt the biofilm’s treatment performance, suggesting that microbes in the foulant layer were tightly adhered and did not significantly contribute to TMP. Dissolved methane oversaturation persisted without high TMP, implying that methanogenesis in the biofilm, rather than high TMP, was the primary driving force in methane oversaturation. The results describe an attractive operational strategy to improve treatment performance in low-temperature AnMBR by supporting syntrophy and methanogenesis in the membrane biofilm through controlled membrane fouling. John Wiley & Sons, Ltd 2015-09 2015-08-04 /pmc/articles/PMC4554476/ /pubmed/26238293 http://dx.doi.org/10.1111/1751-7915.12311 Text en Journal compilation © 2015 John Wiley & Sons Ltd and Society for Applied Microbiology http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Smith, Adam L
Skerlos, Steven J
Raskin, Lutgarde
Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment
title Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment
title_full Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment
title_fullStr Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment
title_full_unstemmed Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment
title_short Membrane biofilm development improves COD removal in anaerobic membrane bioreactor wastewater treatment
title_sort membrane biofilm development improves cod removal in anaerobic membrane bioreactor wastewater treatment
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4554476/
https://www.ncbi.nlm.nih.gov/pubmed/26238293
http://dx.doi.org/10.1111/1751-7915.12311
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