| Peat
filters are commonly single-pass filters but can also
be designed as multi-pass filters. The peat used in these
filters is typically dried and milled sphagnum peat moss or
a fibrous by-product of briquettes used in fuel production.
Peat naturally filters, absorbs, and chemically interacts
with the effluent. Many different kinds of beneficial aerobic
bacteria also adhere to the surface of the peat media to treat
the effluent biologically. The peat is contained in modules
placed above ground or at ground level. Effluent from the
pretreatment unit is dosed onto the peat filter media. The
effluent is then discharged to additional treatment and/or
final dispersal. One advantage of peat as a filter medium
is its effectiveness in situations where loadings are seasonal
or intermittent.
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