Cheap is good, free can be better

Libre Draw: A Good Alternative to Microsoft Visio for Most People Many years ago I read that for any product or service, you can have any two of Cheap, Fast and Good. This sits nicely alongside another saying “buy cheap, buy twice”, something I learned the hard way when racing powerful superbikes round my local […]

Disinfection: Improving the odds

Abstract As operational scientists the authors know well from experience that apparently well-run treatment works can have the occasional coliform failure but all the resamples are compliant. This paper explores why, in the authors’ opinion, this is a consequence of the underpinning disinfection kinetics and two major operational factors, pH and actual retention times. In […]

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