Features

The Top 20 Largest MBRs in the World?

In October 2009, we received a list of what was thought to be the 20 largest MBRs in the world at that time. The peak daily flow capacities on that list ranged from 30 to 100 MLD, with the total capacity being just over 1,000 MLD. 16 of the top 20 installations were fitted with GE’s Zeeweed technology, though the largest – Origin Water’s Wenyu river plant in Beijing – was based on Asahi Kasei membranes.

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Miscellaneous

MBRs − a global picture

Membrane bioreactors (MBRs) are growing both in size and number, reflecting a growing confidence in the technology. The number of MBR membrane module products is currently increasing by 3−5 a year, and the market itself is growing exponentially at a rate between 11.5 and 13%. Whereas in the past MBRs may have been disregarded in favour of conventional treatment plants, ...

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Miscellaneous

When MBR sludge goes bad

Fouling in MBRs arises when materials either form a layer on the surface of the membrane or plug its pores. Studies are, however, generally unable to distinguish between coating of the membrane surface and phenomena relating to the agglomeration of solids. The latter has received little or no attention from the scientific community, and yet such irreversible deposition of solids clearly impairs MBR operation.

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Membrane operation