The dilution effect can cause ...

Published February 13, 2018 11:41 by Matthew Crowhurst, Energy and Water industry Process and Project Professional

The dilution effect can cause a reduction in mlss as the overall load arriving at the site may be reduced causing a reduction in solids growth. If the mlss is not measured and the surplussing times reduced to match the reduced growth, lower mlss will result. This should not affect the filtration but could result in poor biological treatment when the biological load increases after cessation of the storm.

1 Comment

On the flip side of exactly what you may experience based on Matthew's comment, you may experience a relatively stable organic load, since the organic load is a function of the inflow quantity and the concentration of COD, so if COD is reduced due to dilution, your increase in flow may well negate the reduction in COD concentration and you end up with a similar organic load (kg/day) number - you should characterise your incoming COD as each site will be reasonably unique, with composite, flow weight sampling. In this way you can also get to understand your biodegradable fraction, etc.

Published February 16, 2018 08:11 by Gary Brown, Water Practitioner at Dikubu Water

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