Water Chemistry & Chemical Demand
Assess raw-water hardness and alkalinity, estimate hydrated lime or quicklime and soda ash dosages, and calculate daily chemical consumption.
Engineering Excel Workbook
Lime Softener Design Calculation
A structured Excel workbook for preliminary lime–soda softening design. Evaluate raw-water hardness chemistry, lime and soda ash consumption, upflow solids-contact softener dimensions, recarbonation requirements, sludge generation, and linked engineering design checks.
Excel WorkbookChemical SofteningLinked Design Dashboard
What This Module Helps You Design
Solids-Contact Softener Sizing
Size duty softener units, annular upflow area, tank diameter, contact well, working volume, detention time, and overflow weir configuration.
Recarbonation & Sludge Production
Estimate CO₂ dosing, two-compartment recarbonation basin dimensions, CaCO₃ and Mg(OH)₂ solids generation, and sludge slurry requirements.
Calculation Coverage
A linked lime–soda treatment sequence, from raw-water chemistry and reagent requirements to solids-contact tank sizing, recarbonation, and sludge assessment.
Chemical & Water-Quality Basis
- Raw-water calcium, magnesium, alkalinity, and design temperature
- Carbonate / noncarbonate hardness and adopted residuals
- Commercial lime and soda ash dosing and daily consumption
- Selected water chemistry and product purity assumptions
Upflow Solids-Contact Softener
- Duty and standby unit configuration
- Annular upflow rate, softener diameter, and water depth
- Contact-well sizing and detention time
- Weir arms, overflow loading, and basic hydraulic screening
Recarbonation, Sludge & Review
- Preliminary CO₂ demand and carbonate-balance basis
- Mixing and reaction compartment dimensions
- Precipitated solids and sludge slurry estimation
- Softener, recarbonation, and withdrawal design checks
Workbook Experience
See the Complete Engineering Workflow
Explore the actual Calculation Sheet and linked Dashboard layout before purchasing.
Original Lime Softener Dashboard excerpt showing the solids-contact unit, dimensions, reagent requirements, recarbonation, sludge production, and preliminary design review.
Built-in Design Checks
Screen preliminary softener, recarbonation, and sludge withdrawal design parameters against the workbook design basis.
| Review Item | Workbook Evaluation |
|---|---|
| Water chemistry & dosing | Review hardness and alkalinity conversions and chemical consumption from adopted reaction and purity assumptions |
| Softener hydraulic sizing | Evaluate annular upflow rate, required tank size, detention time, and contact-well basis |
| Overflow and weir loading | Review the preliminary discharge arrangement and hydraulic sizing checks |
| Recarbonation sizing | Evaluate mixing/reaction basin geometry and detention time from the adopted process basis |
| Sludge withdrawal | Estimate precipitation, dry solids, and expected slurry withdrawal volumes |
Residual hardness and final pH are adopted preliminary design assumptions, not guaranteed removal predictions. Confirm reagent dosages, carbonate equilibrium, sludge performance, and final equipment sizing using project-specific testing and vendor data.
What's Included
READ ME
Instructions & assumptions
Cover
Project information
Calculation
Chemistry, unit sizing & sludge
Dashboard
Process schematic & design summary
Basis & Symbols
Design criteria, constants & units
This workbook provides preliminary engineering calculation and review support. Reagent selection, residual hardness, recarbonation, process performance, tank internals, and sludge handling remain subject to treatability testing, project-specific criteria, and supplier confirmation.
Complete Your Lime Softener Design
Bring water chemistry, lime–soda dosing, solids-contact softener sizing, recarbonation, and sludge-production estimates into one structured engineering workbook.