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pH Adjustment – Batched

MAK’s pH Adjustment – Batch (PAB) plants are designed to automatically adjust and maintain the pH level of raw water in a batch tank prior to discharge to sewer/environment or reuse/recycling. The standard treatment process includes a batch tank, a recirculation pump to turn over the contents of the batch tank, an inline pH analyser which monitors the pH level and a dosing pump to automatically dose liquid alkali/acid. The recirculation pump is also used to discharge the treated water at the end of each batch cycle. Dual chemical dosing pumps (alkali/acid) are available for when the raw water pH varies to allow for correction of both low and high pH raw water.

The system components are sized to suit the batch tank and to allow for a 1 hour complete batch cycle. Optional equipment upgrades include; a feed pump, duty standby recirculation and dosing pumps, high/low pH levels, dual chemical dosing pumps (alkali/acid). MAK PAB plants are available as skid mounted or containerised systems for easy deployment to remote locations.


Parameter Units PAB-1 PAB-2 PAB-5 PAB-10 PAB-15 PAB-22 PAB-30
Batch Tank Size m³ 1 2.45 5 10 15 22.5 30
Batch Cycle Time mins 30- 60
Recirculation Pump Flow Rate L/pm 100 165 335 650 1,100 1,500 2,000
Recirculation Discharge Pressure m 15 ~ 25
Dosing Pump Flow Rate L/hr 10 20 30
pH Level (target) pH 6 ~ 8 (pH neutral) or as required
pH Range (influent) pH 4 ~ 12 (1 - 14 on request)
Alkalinity (assumed) mg/L as CaCO3 10
Particle Size mm 2
Total Suspended Solids mg/L 1,000
Raw Water Temperature °C 1 - 40
Ambient Design Temperature °C 0 - 45
Power Supply - AC 240V, 1P, 50Hz or AC 415V, 3P, 50Hz AC 415V, 3P, 50Hz
Power Consumption (approx.) kW 1.1 1.5 3 4 7.5 11
Bunded Chemical Storage Tank L 110 210 600 1,000
Container Size (optional) ft 10 10 10 10 10 10 10
Skid Size (excl. Tank) mm 1,300 x 600 x 1,500 2,000 x 1,500 x 1,500



✓= Standard Supply o = Optional Supply - = Not Applicable

Equipment PAB-1 PAB-2 PAB-5 PAR-10 PAB-15 PAB-22 PAB-30
Skid Mounted Plant
Batch Tank (standard pH range)
Recirculation Pump
Chemical Dosing Pump
Bunded Chemical Storage Tank
Alarm Signal Output for Client Interface
Automated Control System
PLC Control System with HMI o o o o o o o
Containerised System, c/w A/C & Lights o o o o o o o
Container Insulation (walls & ceiling) o o o o o o o
Feed Pump o o o o o o o
Duty Standby Recirculation Pumps o o o o o o o
Duty Standby Dosing Pumps o o o o o o o
pH 1 - 14 Range Recirculation Pump o o o o o o o
pH 1 - 14 Range Batch Tank o o o o o o o
Dual Dosing Pumps (alkali/acid) c/w Dual Bunded Chemical Storage Tanks o o o o o o o
Safety Shower & Eyewash Station o o o o o o o
Premium Instrumentation Package o o o o o o o


Instrumentation Standard Package Premium Package
Pressure Gauge
Flow Switch
Float Switch (batch tank & chemical storage tank)
pH Analyser (4-20 mA)
Data Logger (pH level)
Temperature Sensor
Level Transmitter (4-20 mA, batch tank & chemical storage tank) -
Remote Monitoring & Control Capabilities -


Disclaimer: MAK Water is continuously updating and improving its products and services, so please contact us for more detailed information or to confirm specifications. MAK Water takes no responsibility for any errors resulting from the use of information contained within this document.