District of Sechelt Preliminary Report

District of Sechelt
Bio-Solids Treatment Pre-Design Report
Table 8.1: Comparison of Centrifuges and Belt Filter Presses
Centrifuge Belt Filter Press Pressure Filter Press Screw Press
a. Cost
Centrifuges may offer lower
Typically viewed as a lower cost
Highest capital costs and
Low capital cost –
Effectiveness
overall operation and
option compared to the
highest O&M costs –
solids content not
maintenance costs and can
outperform conventional belt
centrifuge, but cannot achieve
the same solids content as a
achieves high solids
content.
guaranteed.
filter presses in terms of dry
centrifuge.
solids produced.
b. Floor Space Centrifuges require a small
amount of floor space relative
Belt presses require more space
than a centrifuge for the same
Largest floor space
requirement.
Low floor-space
requirement.
to their capacity. Less than half
capacity.
the space required for belt filter
presses.
c. Operator
Attention
Centrifuges require minimal
operator attention when
Needs frequent staff attention.
Staffing requirements can be
Significant set up, take
down and cleaning time.
Operator requirement is
relatively low, cleaning
operations are stable. Modern
minimized, if the equipment is
is simple.
control elements take care of
operation fluctuations
large enough to process the
solids in one shift.
automatically.
Belt presses require more
operator attention if the feed
solids vary in their solids
concentration or organic matter.
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