Belt filter press vs. centrifuge in sludge dewatering
24.01.2023
Sludge dewatering basically minimizes waste in the wastewater treatment process. When done correctly this can have many advantages as we wrote before in our blog post.
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
Decanters Centrifuge
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
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