Sludge Thickening & Dewatering Calculator
iWhat this tool does
1Sludge feed
2Thickening
3Dewatering
Results — volume chain
| Item | Value | Unit |
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Thickener & polymer
| Item | Value | Unit |
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Sludge-area instrumentationMAPPED TO OUR RANGE
| Duty | Instrument | Model / spec | Qty |
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Quote the sludge-area instruments at factory price
Flow meters on feed/underflow, blanket level and MLSS on reject streams — at the manufacturer's ex-works price, our margin solely from the export tax rebate.
Request a quote for this duty ← Size the bio-reactor (WAS source) Design Manual homeSources & parameter basis
| [1] | EN 12255-8 (2024) — gravity thickening incl. bio-P sludge prohibition, SLR by sludge type, SRT ≤1.5 d, tank geometry. |
| [2] | Metcalf & Eddy 5th ed. / Andreoli et al. — gravity SLR table (primary 100–150, mixed 40–80, WAS 20–50 by SVI), feed & thickened concentrations. |
| [3] | Spans / CPCB sludge guide — dewatering cake ranges (belt 18–28, centrifuge 20–30, filter press 25–45, screw 18–25), cationic PAM dose 2–8 kg/t DS, screw-press energy. |
How is the sludge volume chain from WAS to cake calculated?
The calculator follows the volume chain from waste activated sludge through thickening to dewatering, so each step's volume reduction is explicit rather than assumed.
Should I use gravity, DAF or mechanical thickening?
Gravity, DAF and mechanical thickening are compared on the thickened concentration and the duty each one delivers, so the choice follows from the target concentration.
How do belt, centrifuge and filter press compare?
The three dewatering options are compared on cake dryness and capacity, which is what actually drives the downstream cake handling cost.
How much polymer is needed and does bio-P cause a problem?
Polymer demand is calculated for the chosen dewatering route, and the calculator warns when bio-P from the biological stage is released, because phosphorus then ends up in the cake.