Calculate caustic soda, lime, or acid dosing rates for pH correction in wastewater treatment. Accounts for buffer capacity, safety factors, peak flows, and solution preparation volumes.
Enter your process parameters below to calculate design values. All calculations follow industry-standard methodologies.
Caustic soda (NaOH) is the most common neutralising agent for acidic wastewater due to its high reactivity and solubility. Lime (CaO or Ca\(OH\)₂) is lower cost but produces more sludge. Sulphuric or hydrochloric acid neutralizes alkaline wastewater. For weakly acidic effluents, soda ash (Na₂CO₃) provides milder buffering. Chemical selection depends on cost, availability, handling safety, and downstream process compatibility.
pH neutralisation systems require rapid mixing with adequate retention time (typically 5-15 minutes) for complete reaction. Online pH monitoring with automated chemical dosing provides the most stable effluent pH. Batch neutralisation tanks are simpler but produce more variable effluent. Two-stage neutralisation (coarse + fine) improves control for highly variable influents. Always provide a minimum 10-20% safety factor on chemical storage capacity.
General chemical dosing calculations for coagulation, flocculation, and pH adjustment.
Dosing CalculatorAutomated pH neutralisation and correction systems for industrial wastewater.
pH Systemsneutralisation tanks, reaction vessels, and equalization tanks for chemical treatment.
View TanksOur chartered engineers can validate your calculations, review your design, and provide detailed process documentation.
Our expertise spans multiple industries with sector-specific water treatment solutions.