Belt filter press vs. centrifuge in sludge dewatering
In this table, we focus on comparing two sludge dewatering technologies. Dewaco solutions are based on belt filter presses and gravity belt thickeners. The findings here are based on OWEA Biosolids Specialty Workshop.
|Belt Filter Press
|Low energy requirement
|High energy requirement
|Lowest polymer dosage
|High usage of polymer
|Simple to operate and maintain
|More complicated to operate and maintain
|Easy start-up and shutdown amenable to intermittent operation, a few hours daily
|Start-up and shutdown take time and must be done carefully to avoid major damage to unit, Operation needs to be continuous
|Low carbon footprint
|Largest carbon footprint
|Maintenance can be done by plant personnel
|Maintenance cannot be done by plant personnel
|The process is observable allowing quick operator response to unstable conditions to avoid upsets
|An unstable sludge feed can make performance difficult to monitor and make the proper adjustment
|No requirements for any special structural foundation
|Special structural requirements for equipment foundation
|Most repairs can be made in a couple of hours
|Downtime for repairs usually takes weeks/months
|Least expensive total Life Cycle Cost
|Require many units to be economically viable
OWEA Biosolids Specialty Workshop, December 3. 2015, Dan Fronhofer, P.E. BDP Industries.
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