Dye bath pH control, mercerization caustic recovery, effluent neutralisation after sulphur dyeing, and finishing bath pH adjustment.
Dye bath pH control, mercerization alkali neutralisation, and effluent pH compliance for textile mills and garment finishing.
Reactive, acid, and disperse dyes require precise pH for colour fastness and exhaustion. Sulphuric acid or acetic acid adjusts pH 4–6 for acid dyes; soda ash raises pH to 10–11 for reactive dyes.
Mercerization uses 22–26% caustic soda (pH ~14). Rinse water and effluent require acid neutralisation to pH 6–9 before discharge. Rapid neutralisation prevents fabric damage in combined streams.
Pigment printing pastes and finishing baths (softeners, stiffeners) have variable pH. Process water pH correction ensures consistent bath chemistry and prevents batch variation.
Combined textile effluent ranges from acidic (dyeing, printing) to highly alkaline (scouring, mercerizing). Two-stage neutralisation with flow-paced dosing handles variable loads.
| Application | Target pH | Reagent | Notes |
|---|---|---|---|
| Acid Dye Bath | 4.0 – 6.0 | Acetic / Sulphuric Acid | Wool, silk, nylon |
| Reactive Dye Bath | 10.0 – 11.5 | Soda Ash / Caustic | Cotton, viscose |
| Mercerization Rinse | 6.0 – 9.0 | Hydrochloric / Sulphuric | High volume, hot |
| Scouring Effluent | 6.0 – 9.0 | Acid / CO2 | Alkaline, surfactants |
| Printing Paste | 7.0 – 8.5 | Acid / Alkali | Process consistency |
| Final Effluent | 6.0 – 9.0 | Acid or Alkali | Discharge compliance |
Acetic, sulphuric, and hydrochloric acid dosing for dye baths and mercerization rinse neutralisation.
Discover MoreSoda ash and caustic soda dosing for reactive dye fixation and scouring effluent pH adjustment.
Discover MoreDye bath pH automation with inline sensors, peristaltic pumps, and recipe-based PLC control.
Discover MoreCompact effluent pH correction systems for textile mills with flow-paced dosing and mixing tanks.
Discover MorepH 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.
Food-grade acid and alkali selection prevents taint and ensures compliance with food safety standards. Automated CIP integration available.
Validated dosing systems with full IQ/OQ documentation. Hygienic design prevents biofilm formation in pure water loops.
High-purity dosing for boiler feed water and cooling tower blowdown neutralisation. Redundant pump arrangements ensure availability.
Heavy-duty construction withstands aggressive mine water chemistry. Remote telemetry enables operation at unmanned sites.
Reference our oil-gas pH practice for cross-industry dosing reliability comparisons.
Read MoreAll pH adjustment technologies, reagents and reactor designs.
Read MoreFeedback, feed-forward and cascade control for pH dosing loops.
Read MoreRight pump for acid / caustic / lime dosing duties.
Read MoreContact Our Engineers for system design, sizing, and quotation.
Illustrative scenarios showing how this equipment is configured for real-world applications.
Our expertise spans multiple industries with sector-specific water treatment solutions.