The MBR Blog

Simon Judd, author of The MBR Book, Watermaths, and Industrial MBRs, offers observations on membrane technology in this occasional blog.

About Simon

Professor Simon Judd lectures at Cranfield University in the UK and Qatar University in the Middle East. He has over 20 years’ experience in teaching the fundamentals of water and wastewater technologies and is an acknowledged expert in membrane bioreactor technology and produced water.

Simon has written a number of text books on water and wastewater treatment, including ‘Watermaths‘, a textbook for undergraduates and practitioners on maths for water and wastewater treatment technologies.

He continues to conduct research into wastewater technologies, specialising in membrane bioreactors and produced water, and provides consultancy on water and wastewater treatment to clients across the globe. Contact Simon at

  • 20 July 2017
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    Degritting in MBRs: true grit costs

    There’s plenty of tales of the impact of poor screening on downstream unit operations generally and on MBRs in particular. While there is very little actual proper research into the performance of screens published in the ... Read more

  • 30 June 2017
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    MBR sludge: fouling or clogging?

    Guest blogger Dr Pompilia Buzatu, post-doctorate researcher at the Gas Processing Center in the College of Engineering, Qatar University, discusses her research into MBR fouling and clogging We’ve spent a few months now here at ... Read more

  • 04 June 2017
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    MBR research trends: the cost of unoriginality

    Sharp-eyed readers of this blog, and possibly those people whose lives are blighted by knowing me personally, may have received the impression that I am not a huge fan of MBR research publications based on ... Read more

  • 20 May 2017
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    Influent quality – garbage in …?

    Many of the challenges faced by MBRs have very little to do with the membrane technology and everything to do with the components or issues around it.  This can include the software, the screens, the ... Read more

  • 24 March 2017
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    MABRs (or membrane aeration bioreactors to you and me)

    The membrane aeration bioreactor (MABR) seems to be the new kid on the block, with just a few commercial technologies around and, it seems, just one or two full-scale installations (though there have been large-scale ... Read more

  • 27 February 2017
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    The cost of ceramic membranes for MBRs

    If there’s one subject which seems to divide opinion pretty sharply in the membrane and water treatment community, it’s the role and future of ceramic membranes. That’s assuming, of course, that people do have an ... Read more

  • 17 February 2017
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    MBR maths modelling II – a view from our guest bloggers at Ghent University

    Guest bloggers Youri Amerlinck, Bram De Jaegher, Wouter Naessens and Ingmar Nopens from Ghent University1 respond to Simon’s last blog on MBR maths modelling 1Youri Amerlinck, Bram De Jaegher, Wouter Naessens and Ingmar Nopens, BIOMATH, ... Read more

  • 02 December 2016
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    Exploring the possibilities of MBR Modelling

    It’s a model (and it’s looking good) … The age-old criticism of mathematical modellers is that have no concept of reality. There’s that classic joke about a millionaire racehorse owner who hired the services of ... Read more

  • 26 September 2016
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    The 2016 MBR Survey – the results

    Last year, we asked ‘What’s the main issue with MBRs?’ This time our question focused on the topic of sludge – most of your responses from the previous three surveys had been based around this topic so we felt it was worthy of further investigation. ... Read more

  • 06 June 2016
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    IFAT Munich 2016 – a report

    As the largest water-wastewater-waste trade show globally, Munich’s IFAT (30 May-3 June 2016) is certainly a sizeable affair. The Messe München venue, handily placed at the end of the U2 metro line, comprises 16 aircraft ... Read more

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