How can we help

We can find a solution for your needs
  • By clicking send you agree to Privacy Policy

Enquire about Activated Sludge Bioreactor

Request a Quote

  • By clicking send you agree to Privacy Policy

Activated Sludge Bioreactor

MAK Water’s Activated Sludge Bioreactor (ASBR) type packaged sewage treatment plants are designed to treat domestic strength sewage, to achieve “Class C” treated effluent, 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, aerobic treatment, clarification and effluent disinfection (chlorine tablets). The optional “Class A” upgrade includes an auto-backwashing media filter, disinfection via tank recirculation and hypochlorite dosing, and analysers 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 capacitym3/day25355070100
*1Balance tank volume (recommended)m325355070100
*1Treated effluent tank volume (*2minimum)m34.05.58.01116
Sludge tank volumem35.35.310.510.523
Thickened Sludge waste volume m3/day0.
*3 Irrigation pump dutym3/hr @ 500 kPa2.
Ambient temperature (min/max)°C1 ~ 35 (1 ~ 43 with optional plant room air-conditioner)
Power supply-AC 415 V, 3 Phase, 50 Hz
Power consumptionClass C (max)kW912152028
Class A (max)kW1619222735
*3Irrigation pump motor sizekW0.550.751.11.52.2
*3Air conditionerkW1.
FootprintFRP bioreactor & access platformm6 x 3.27.5 x 3.29 x 3.212 x 3.210 x 3.8
Sludge tankØm1.81.82.452.453.83


CharacteristicsUnitsInfluent*4Class C Effluent*4Class A Effluent
pHpH units6.5~8.56.5~8.5
Biological oxygen demand (BOD)mg/L*5≤350<20
Suspended solids (TSS)mg/L*5≤350<30
Oil & greasemg/L<10-
Total nitrogen (T-N)mg/L≥20N/A (no reduction)
Total phosphorus (T-P)mg/L<164~12 (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-0.2~2.0

*1 Sold Separately, *2 For 15 contact time, *3 Optional Equipment, *4 Based on QLD Guidelines, *5 Referenced from Metcalf & Eddy (5th edition, 2014), Typical composition of untreated domestic wastewater; higher/lower design values available on request.


✓= Standard Supply, o = Optional Supply

Automatic inlet screen (2 mm)
Influent mixing pump
Influent feed pump
FRP bioreactor with aluminium access platform & ladderAerobic zone with submersible aerator 
Clarifier with scum removal system
Buffer zone/tank with tablet chlorinator
Bioreactor roofing (COLORBOND® steel sheeting)ooooo
Plant room with overhead lighting and GPO for maintenanceChemical dosing – coagulant
RAS/WAS pump
Effluent transfer/filter feed pump
Class AAuto-backwashing media filter ooooo
Treated effluent tank recirculation pumpooooo
Hypochlorite dosingooooo
PLC control system with HMI
Plant room air conditionerooooo
Sludge tank with supernatant sampling points and discharge valves
Supernatant sump with submersible pump and level controlooooo
Irrigation pump with level control and mechanical flow totaliserooooo
InstrumentationStandard package
Premium package with ClearAccessremote monitoringooooo


Instrumentation & ControlsStandard PackagePremium Package
Level switchesBalance tank-
Sludge tank
Chemical dosing tank(s)
Supernatant sump (optional)
Level transmittersBalance tank-
Buffer tank
Treated effluent tank
Flow switchesEffluent transfer pump (Class C)-
Treated effluent recirculation pump (Class A)-
Irrigation pump (optional)-
Pressure switchesBalance tank mixing pump
Pressure indicatorsBalance tank mixing pump
Influent feed pump
RAS/WAS pump
Effluent transfer pump (Class C)
Media filter feed pump (Class A)-
Media filter discharge (Class A)-
Irrigation pump (optional)
Treated effluent recirculation pump (Class A)
Pressure transmitterMedia filter feed pump (Class A)-
Media filter discharge (Class A)-
Magnetic flow transmitterInfluent feed pump
Mechanical flow totaliserIrrigation pump (optional)
Free chlorine and pH analyser (Class A) 
Turbidity analyser (Class A) 
ClearAccessTM remote monitoring & control capabilities-