Need an editable Microsoft Excel version instead? Leave your email in the comments section of the download portal to receive the unlocked .xlsx file.

Do you need assistance calculating the or hydraulic retention time ? Share public link

Hydro International, Ecologix Systems, Hydroflotech, and Metso provide free technical catalogs and design guides (e.g., Hydro's Lamella Separator product profile).

N=83.33 m20.75 m2=111.11→Round up to 112 platescap N equals the fraction with numerator 83.33 m squared and denominator 0.75 m squared end-fraction equals 111.11 right arrow Round up to 112 plates

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Open-air lamella clarifiers can experience bio-fouling on plate surfaces, requiring manual hosing or built-in backwash systems.

Particles only need to fall a few centimeters before striking a plate surface.

Several free PDF documents and spreadsheets are available online to assist with lamella clarifier design. Below is a curated list of resources:

This approach is derived from , which states that particle removal efficiency in gravity settlers depends primarily on the available surface area for settling, not the overall depth of the basin. With inclined plates, the settling area equals the sum of the horizontal projections of each plate. As a result, a lamella clarifier can provide up to 10 m² of settling area per square metre of ground area and reduce overall space requirements by up to 90%.

For the working engineer, these PDFs serve as excellent checklists. Unlike bulky textbooks which may dedicate only a few paragraphs to Lamella design, these specific calculation documents are often laser-focused. They are invaluable for:

With the document as his guide, Elias spent the night calculating: The 55-degree rule

Areq=QSORcap A sub r e q end-sub equals the fraction with numerator cap Q and denominator cap S cap O cap R end-fraction

) is greater than the horizontal footprint. It is calculated by dividing the required horizontal area by the sine of the inclination angle (

The basic principle of an inclined plate settler was first described and quantified by Hazen in 1904. A conventional settling basin relies on gravity to allow particles to settle to the bottom, but the distance a particle must travel vertically in a large basin can be 10 to 20 feet. In contrast, a lamella clarifier uses a series of closely spaced flat plates inclined at an angle of . The vertical travel distance for a particle is reduced to 2 inches (50 mm) or less .