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pH Adjustment – Recirculated

MAK’s pH Adjustment – Recirculated (PAR) plants are designed to automatically adjust and maintain the pH level of raw water in a storage tank, prior to discharge to sewer/environment or reuse/recycling. The standard treatment process includes a recirculation pump to turn over the contents of the storage tank twice in a 24 hour period, an inline pH analyser which monitors the pH level and a dosing pump to automatically dose liquid alkali/acid. 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 storage tank and daily usage. Optional equipment upgrades include; duty standby recirculation and dosing pumps, high/low pH levels, dual chemical dosing pumps (alkali/acid). MAK PAR plants are available as skid mounted or containerised systems for easy deployment to remote locations.


Storage Tank Size (by others)m³1025251002505001,0002,500
Recirculation Pump Flow Ratem³/hr0.8228.320.841.683.3208.3
Recirculation PressurekPa100 ~ 200
pH Level (target)pH6 ~ 8 (pH neutral) or as required
pH Range (standard)pH4 ~ 12
Raw Water Temperature°C15 ~ 35
Ambient Design Temperature°C5 ~ 35 (-15 ~ 50 for insulated containerised system)
Feed Water Inlet PressurekPa>15 (flooded suction)
Power Supply -AC 240V, 1 phase, 50Hz or AC 415V, 3 phase, 50HzAC 415V, 3 phase, 50Hz
Installed Power (approx.)kW1111.52.53.5616
Bunded Chemical Storage Tank L2002002005005001,0001,0001,500
Container Size (optional)ft10’10’10’10’10’10’10’20’
Skid Sizemm1,300 x 560 x 1,5002,000 x 1,500 x 1,500


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

Skid Mounted Plant
Recirculation Pump
Chemical Dosing Pump
Bunded Chemical Storage Tank
PLC Control System with HMI
Alarm Signal Output for Client Interface
Containerised System, c/w A/C & Lightsoooooooo
Container Non-slip Floor Coatingoo
Container Insulation (walls & ceiling)oooooooo
Container Side Access Door------oo
Duty Standby Recirculation Pumpsoooooooo
Duty Standby Dosing Pumpsoooooooo
pH 1-12 Recirculation Pumpoooooooo
Dual Dosing Pumps (alkali/acid) c/w Dual Bunded Chemical Storage Tanksoooooooo
Safety Shower & Eyewash Stationoooooooo


InstrumentationStandard PackagePremium Package
Pressure Gauge
Flow Switch
Float Switch (chemical storage tank)
pH Analyser (4-20 mA)
Level Transmitter (4-20 mA, 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.