Lamella Clarifier Design Calculation Pdf: Downloadl Better

[ Re = \fracV_channel \cdot d_h\nu ]

Industrial plant discharges 400 m³/day of wastewater (peak hour = 30 m³/h). TSS = 200 mg/L, particle density = 1.2 g/cm³, water at 20°C. Desired effluent TSS < 50 mg/L.

Typical design HLR for lamella clarifiers ranges from (conventional clarifiers: 0.5–1.0 m³/m²·h). lamella clarifier design calculation pdf downloadl better

Using Stoke’s Law with dp = 60 µm (0.00006 m), ρp=1200 kg/m³, ρw=998, µ=0.001 Pa·s: Vs = (9.81 × (6e-5)² × (202)) / (18 × 0.001) = ~0.00396 m/s = 3.96 mm/s (or ~14.3 m/h)

A lookup table for spacing based on sludge type (e.g., 50 mm for light floc, 75 mm for heavy grit). 2.5. Reynolds Number (Re) per Channel Laminar flow is mandatory. For flow between parallel plates: [ Re = \fracV_channel \cdot d_h\nu ] Industrial

[ A_proj = \textTotal plate area \times \sin(\theta) ]

[ N_plates = \frac\textWidth of clarifier tank\textPlate spacing + \textplate thickness ] Typical design HLR for lamella clarifiers ranges from

Where (\theta) is the inclination angle (typically 50–60° from horizontal).