WET CHEMISTRY WORKBENCH

Digital Wet Lab

Otty Lake Virtual Chemical Jar Test & Dosing Simulator

Empirical dose–removal screening for Calcium / Lime (Ca(OH)₂), Alum and Ferric coagulants (unsourced constants; uncalibrated). Modeled (Simulation).

Card A

Pre-treatment chemistry (rainfall is used only in the screening-dose formula)

Initial TP: 0.08 mg/L

0.010.30

Initial Turbidity / TSS: 30 mg/L

5 mg/L (Clear)150 mg/L (Turbid)

Initial Organic BOD: 15 mg/L

2 mg/L (Pristine)80 mg/L (High Load)

Raw Inflow pH (recorded for reference only): 7.8

pH 6.0pH 7.5pH 9.0

Storm Rainfall R (screening-dose formula only): 25 mm

0 mm100 mm

Card B

Applied active coagulants, precipitants, & adjusted reaction pH

Applied Calcium / Lime: 25 mg/L

0 mg/L (None)100 mg/L (Lime Ca(OH)₂)

Applied Alum Coagulant: 0 mg/L

0 mg/L (None)80 mg/L (Alum Al₂(SO₄)₃)

Applied Ferric Salt [FeCl₃]: 0 mg/L

0 mg/L (None)60 mg/L (Ferric Iron)

Target Operating pH: 8.5

pH 6.0pH 8.5pH 11.0