Rectangular Primary Clarifier
1Duty & clarifier
Results — area & removal
| Item | Value | Basis |
|---|
2Geometry & removal
| Item | Value | Basis |
|---|
Operation envelope
| Item | Value | Basis |
|---|
Quote the clarifier instruments at factory price
A rectangular primary needs a sludge-level transmitter, RAS flowmeter and an influent TSS monitor — all mappable to our catalogue and supplied at the manufacturer's ex-works price (margin from the export rebate only).
Request a quote for this duty ← Equalization Basin A²/O Biological Nutrient Removal →Sources & parameter basis
| [1] | METCALF & EDDY 5th ed. / TEN STATES — primary SOR peak 1.5–4.5 m/h, HRT 1.5–3 h (typical 2), depth 2.5–4.5 m, weir overflow ≤ 250–500 m³/m·d (straight), TSS removal 50–65 %, BOD 25–40 %. |
How do I size a rectangular primary clarifier?
Surface area = peak flow / peak overflow rate. Hydraulic retention time HRT = tank volume / flow, with volume = area x side-water depth. The calculator returns area, HRT, and weir overflow rate for tropical municipal WWTP primary treatment.
What side-water depth should a primary clarifier use?
A typical side-water depth is 2.5-4.5 m; it sets tank volume and therefore HRT at a given surface area. The calculator takes depth as an input in that range and derives volume and HRT from it.
What TSS and BOD removal can a primary clarifier achieve?
Primary clarification typically removes a large fraction of TSS and a moderate fraction of BOD. The calculator estimates TSS/BOD removal for the design overflow rate you enter.