Caustic soda, soda ash, and potassium hydroxide dosing for low-pH correction. Precision metering with real-time pH feedback control for any flow rate.
Sodium hydroxide (25-50% solution) provides rapid pH increase. Most common alkali for industrial effluent. Instant reaction, precise control.
Sodium carbonate for moderate pH increase with alkalinity addition. Safer handling than caustic. Ideal for boiler feed and cooling water.
Calcium hydroxide slurry for bulk pH raise at lowest cost per kg alkalinity. Common in mining, steel, and municipal applications.
Calcium oxide for large-scale neutralisation. Requires slaking to Ca(OH)4 before dosing. Lowest chemical requirement for high-tonnage operations.
Low pH Effluent
Process Water
AMD Treatment
Metals Precipitation
pH Compliance
Coagulation Aid
Gentle pumping action for caustic soda without seal wear. Self-priming and dry-run capable.
ViewDual-setpoint controllers for alkali dosing with deadband to prevent acid-alkali hunting.
ViewAutomated lime preparation with mixing tanks, recirculation loops, and progressive cavity feed pumps.
ViewpH correction is a critical stage in wastewater and process water treatment. Incorrect pH can damage downstream biological systems, corrode pipework, violate discharge consent limits, and compromise product quality. Our dosing systems utilise flow-proportional control with automated feedback loops to maintain target pH within ±0.2 units, regardless of influent variability.
Rapid mixing and reaction kinetics ensure complete neutralisation before downstream processes.
Flow-paced and feedback-controlled dosing eliminates chemical wastage and overshoot.
Systems account for influent buffer capacity to calculate precise reagent requirements.
Automated temperature compensation ensures accurate pH measurement across seasonal variations.
| Flow Range | 0.5 – 5,000 m³/h |
| pH Setpoint Range | 4.0 – 10.5 (adjustable) |
| Control Accuracy | ±0.2 pH units |
| Response Time | <30 seconds to setpoint |
| Reagent Concentration | 10% – 98% (application specific) |
| Materials | SS316L, PVC, PVDF, PTFE, rubber-lined steel |
| Control Philosophy | Flow-paced + cascade PID feedback |
| Communication | Modbus RTU/TCP, Ethernet/IP, OPC-UA |
Quality management systems ensuring consistent design, manufacture, and commissioning.
Explosion-proof dosing skids available for Zone 1 and Zone 2 hazardous area installations.
Systems engineered to meet local discharge consent limits including pH, metals, and COD.
Complete pH neutralisation systems for acid and alkaline wastewaters.
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Our expertise spans multiple industries with sector-specific water treatment solutions.