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Activated Sludge Bioreactor Plus

MAK Water’s Activated Sludge Bioreactor Plus (ASBR+) type packaged sewage treatment plants are designed to treat domestic strength sewage, to achieve “Class C” treated effluent, plus enhanced nutrient removal, suitable for reuse in “risk category low” applications or for discharge to environment. With the optional “Class A” upgrade, treated effluent suitable for reuse in “risk category medium” applications is achieved.

The standard treatment process includes influent screening, balance tank mixing, anoxic & aerobic treatment for nitrification and denitrification, clarification, effluent sterilization (chlorine tablets) and bag filtration (100 micron). The optional “Class A” upgrade includes an auto-backwashing filter (25 micron), secondary chlorination via tank recirculation and residual trim hypochlorite dosing, and analyzers for online monitoring of treated effluent turbidity, free chlorine and pH.

MAK Water’s ASBR+ Bioreactors are constructed of corrosion resistant FRP, and are self-contained, modular systems for easy deployment to remote locations.

The FRP bioreactor tank fits into a 40’ shipping container. This allows it to travel as general purpose cargo on a conventional container vessel, for cost effective shipping anywhere in the world, as well as providing mechanical protection from damage during shipment.

If you have specific requirements, contact us to discuss our custom designed sewage treatment plants or ask about our hire options.


Treatment capacity (min/max)m3/day2.5 / 106.3 / 2512.5 / 5017.5 / 70
*1Balance tank volume (recommended)m320356587.5
*1Treated effluent tank volume (recommended)m310255070
Sludge tank volumem3922.5
Sludge waste volume (min/max)m3/month1.1 / 4.21.2 / 4.91.8 / 7.32.0 / 7.9
*2Irrigation pump dutym3/hr @ 500 kPa1.
Ambient temperature (min/max)°C1 ~ 35 (1 ~ 43 with optional plant room air-conditioner)
Power supply-AC 380~450 V, 3 Phase, 50/60 Hz
Power consumptionClass C (max)kW7.17.911.213.7
Class A (max)kW7.79.212.817.1
*2Irrigation pumpkW0.551.52.22.2
*2Air conditionerkW1.
FootprintFRP bioreactorm / ft7.5 x 2.4 / 25 x 89 x 2.4 / 30 x 812 x 2.4 / 40 x 812 x 2.4 / 40 x 8
Containerised plant roomm / ftN/A (plant room integral to FRP bioreactor)3 x 2.4 / 10 x 8


CharacteristicsUnitsInfluent*3Class C effluent*3Class A effluent
pHpH units6.5~8.56.5~8.5
Biological oxygen demand (BOD)mg/L150~400<20
Suspended solids (TSS)mg/L150~300<30
Oil & greasemg/L<10-
Total nitrogen (T-N)mg/L<80<10 (or 70 mg/L reduction from influent value)
Total phosphorus (T-P)mg/L<161~2 (variable according to coagulant dose rate)
Total dissolved solids (TDS)mg/L<2,000-
TurbidityNTU-N/A<5 (95%ile)
E.Colicfu/100 mL-<1,000<10
Free chlorinemg/L-0.2~2

*1 Sold Separately *2 Operational Equipment*3 Based on QLD Guidelines 


✓= Standard Supply, o = Optional Supply

Automatic inlet screen (2 mm)
Influent mixing pump
Influent feed pump
FRP bioreactor with access platform & ladderAerobic zones with submersible aerators & MLR pump
Anoxic zone with submersible mixing pump
Clarifier with scum removal system
Chlorine contract zone with tablet chlorinator
Bioreactor roofing (COLORBOND® steel sheeting)oooo
Plant room with overhead lighting and GPO for maintenanceChemical dosing – coagulant, sucrose & caustic
RAS/WAS pump
Effluent transfer/filter feed pump
Class CBag filter (100 µm)
Class AAuto-backwashing filter (25 µm)oooo
Treated effluent tank recirculation pumpoooo
Residual trim hypochlorite dosingoooo
PLC control system with HMI
Plant room air conditioneroooo
Sludge tank with supernatant sampling points and discharge valves
Supernatant sump with submersible pump and level controloooo
Irrigation pump with level control and mechanical flow totaliseroooo
InstrumentationStandard package
Premium package with ClearAccessTM remote monitoringoooo


Instrumentation & ControlsStandard PackagePremium Package
Balance & chlorine contact tank float level switches-
Chemical dosing & sludge tank float level switches
Pressure switches
Pressure gauges
Magnetic flow transmitters (influent feed pump and MLR pump)
Aerobic tank dissolved oxygen analyser
Aerobic tank pH analyser
Class A onlyTreated effluent chlorine & pH analyser
Treated effluent turbidity analyser
Variable speed drivesInfluent feed pump
Submersible aerator 1
MLR pump
Balance & chlorine contact tank level transmitters-
ClearAccessremote monitoring & control capabilities-