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Workshops organised by the technology and system suppliers − such as Ovivo’s 10th annual event for MBR operators in Austin Texas, in May 2015 − never fail to extend one’s knowledge, by lining up plant operators with real practical experience.
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Of all the questions that crop up about MBR technology, perhaps the most frequent is, 'What is the global capacity of MBR treatment technology?' Of course, as with most questions of this nature, the honest answer is, 'I don’t know'.
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Simon Judd was ranked the 5th highest leader within the international water industry, according to Water and Wastewater International in their listing of The Top 25 Water Industry Leaders 2015.
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If you ask the price of anything at all relating to engineering, you'll often get the answer 'it depends'. Establishing the cost of an MBR installation is no different: there are many different cost components and many ways of determining them.
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The choice of MBR technologies is, it would appear, a series of dilemmas: anaerobic vs aerobic, immersed vs sidestream, ceramic vs polymeric, flat sheet vs hollow fibre (for immersed), pumped vs. air-lift (for sidestream). You could just flip a coin...
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What does the future hold for MBRs? How will they develop? The answer is always the same: If I really knew what was going to happen, do you think I’d still be doing this job?
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American contemporaries of mine recall being told that, by the time they left school, all these Imperial units will have been cast asunder to make way for decimal. It’s been a long wait, and the waiting isn’t over yet.
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Unless they’ve spent the last 10−15 years living in a cupboard, pretty much anyone working in municipal wastewater will at least be aware of the issue of micropollutants: trace quantities of anthropogenic materials which are onerous to the environment.
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A notion regarding wastewater is its potential to provide a useful resource, rather than being viewed as a waste. This is not completely far-fetched. Wastewaters high in readily biodegradable organic carbon can be anaerobically treated to provide methane.
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Are MBRs always going to be favoured for municipal reuse? For a new build, the case would appear overwhelming, though improvements in alternative technologies should not be overlooked.
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I once asked for feedback on the most challenging industrial effluent for treatment using an MBR. It was largely ignored. But treating large volumes of high-strength industrial effluent in a confined space is always going to be challenging and expensive.
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The paper-writing machine that is Dr Fangang Meng of Sun Yat Sen University.
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