(of Water Sciences, Cranfield University, 1996-06-12) Pearce, Peter A.
Aeration costs account for a large proportion of the total running costs of
biological aerated filters (BAFs) which are in themselves an energy intensive
form of treatment process. Optimisation of oxygenation efficiency is therefore
an obvious goal as small improvements in operating efficiency will yield
significant savings in energy consumption.
This paper will deal with the oxygen transfer characteristics of a downflow
BAF using mineral media. Clean water and operational performance are
compared over a range of hydraulic and organic loadings and a range of air
flow rates. Alternative aeration devices and aeration procedures were also
evaluated but will only be discussed in summary in this paper.