# The MBR Blog

Simon Judd

Professor Simon Judd has over 20 years’ experience in teaching the fundamentals of water and wastewater technologies and is author of The MBR Book, watermaths (2nd ed), and Industrial MBRs.

Contact Simon at simon@juddwater.com.

STOP PRESS: The third edition of watermaths is now available, published by IWA. Get 20% off the standard price (GBP £55) by using code MBRIWAP20 at checkout.

## MBR cost determination

It's often the case that if you ask the price of anything at all relating to engineering, you'll get the answer 'It depends'. Trying to establish the cost of an MBR installation is no different: there are many different components of cost, and many ways of determining them.

## Which MBR?

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...

## The future for membrane bioreactor technologies

It's inevitable that anyone choosing to write a reference text book about MBRs is going to learn a lot. Perhaps the most obvious learning point, though, is the development of MBR membrane technologies themselves: the module and process configuration.

## Imperial units versus Le Système international d'unités (SI units)

Length, area and volume are expressed in three different units in specific flux. To resolve to a single unit of length requires converting gallons to either cubic feet or cubic inches. Then there’s the concept of 'pounds force', force being mass times gravitational acceleration...

## Recalcitrant micropollutants and MBRs

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.

## MBRs − towards zero energy and zero waste

A long-standing 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.