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pH Adjustment – Batch

MAK Water’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 an 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-4 PAB-9 PAB-13 PAR-22 PAR-32
Batch Tank Size 1 2.5 4.5 9 13.5 22.5 32
Batch Cycle Time hr 1
Treatment Flow Rate m³/day 24 60 108 216 324 540 768
pH Level (target) pH 6 ~ 8 (pH neutral) or as required
pH Range (standard) pH 4 ~ 12
Raw Water Temperature °C 15 ~ 35
Ambient Design Temperature °C 5 ~ 35 (-15 ~ 50 for insulated containerised system)
Recirculation Pump Flow Rate m³/hr 4 10 18 36 54 90 128
Recirculation Pressure kPa 100 ~ 200
Power Supply - AC 240V, 1P, 50Hz or AC 415V, 3P, 50Hz AC 415V, 3P, 50Hz
Power Consumption (approx.) kW 1 2 4 8 11 15 30
Bunded Chemical Storage Tank L 200 200 200 200 300 500 1000
Container Size (optional) ft 10 10 10 10 10 10 10


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

Equipment PAB-1 PAB-2 PAB-4 PAR-9 PAB-13 PAB-22 PAB-32
Skid Mounted Plant
Batch Tank (standard pH range)
Recirculation Pump
Chemical Dosing Pump
Bunded Chemical Storage Tank
pH Analyser
PLC Control System with HMI
Alarm Signal Output for Client Interface
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
High/Low pH Range Recirculation Pump o o o o o o o
High/Low pH 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
Temperature Sensor & Alarm o o o o o o o
Premium Instrumentation Package o o o o o o o


Instrumentation Standard Package Premium Package
Pressure Gauge
Pressure Switch
Float Switch (batch tank & chemical storage tank)
pH Analyser (4-20 mA)
Level Transmitter (4-20 mA, batch tank & chemical storage tank) -
Data Logger (pH level) -
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.

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