Selecting acids, alkalis and CO2, staging neutralisation and engineering the mixing and feedback control that delivers stable, overshoot-free pH correction at plant scale.
Sulphuric and hydrochloric acids give fast, economical acid correction; concentration, materials and safety drive the selection.
Caustic soda, lime and soda ash raise pH; lime adds hardness and alkalinity while caustic gives clean, fast control.
CO2 is self-limiting near neutral and avoids acidic overshoot, ideal for safe, unattended alkaline correction.
A single mixed reaction tank suits well-buffered streams with a gentle titration curve.
Two or three stages with decreasing reagent rate handle steep curves, dosing hard then trimming gently.
Effective mixing ensures reagent contacts the whole stream before the pH sensor, preventing oscillation.
Robust, regularly calibrated electrodes with temperature compensation provide the control signal.
Combined feedforward (flow/load) and feedback (measured pH) control tracks the titration slope for stability.
CO2 and reagent interlocks provide inherent and engineered protection against overshoot.
Mixed reaction vessels sized for residence time and staged for control.
Metering pumps, storage and containment for acids, alkalis or CO2 injection.
Redundant pH loops, alarms and logging for stable, evidenced operation.
Reynolds & Bauhm designs pH-adjustment and neutralisation systems — from self-limiting CO2 carbonation to multi-stage acid/alkali control — matched to your buffering chemistry and discharge consent.
Our expertise spans multiple industries with sector-specific water treatment solutions.