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Membrane Bioreactor

MAK Water’s Membrane Bioreactor (MBR) type packaged sewage treatment plants are designed to treat domestic strength sewage, to achieve “Class A+” treated effluent, suitable for reuse in “risk category high” applications or for discharge to sensitive environments.

The standard treatment process includes influent screening, balance tank mixing, anoxic & aerobic treatment, flat sheet membrane filtration with air scouring and CIP system, and effluent disinfection (hypochlorite dosing). MAK Water’s bioreactors are constructed of corrosion resistant FRP, and are self-contained, modular systems for easy deployment to remote locations.

STANDARD SPECIFICATIONS

Parameter Units MBR-020 MBR-045 MBR-060 MBR-075 MBR-155 MBR-225 MBR-315
Treatment capacity (min/max) m3/day 10 / 20 22.5 / 45 30 / 60 37.5 / 75 77.5 / 155 112.5 / 225 157.5 / 315
Balance tank volume (recommended)*1 m3 21 47.1 62.9 78.6 162.4 235.7 330
Treated effluent tank volume (recommended)*1 m3 20 45 60 75 155 225 315
Sludge tank volume m3 3.5 9.5 13.5 22.5 32 46 64
Sludge waste volume (max) m3/month 5.3 13.2 17.5 21.9 45.3 65.8 92.1
Irrigation pump duty*2 m3/hr @ 500 kPa 2.5 5.6 7.5 9.4 19.4 28.1 39.4
Screen wash water supply m3/hr @ 500 kPa 1.1 2.2 2.2 2.2 5.5 7.5 11
Ambient temperature (min/max) °C 1 / 43
Power supply - AC 415V, 3 Phase, 50 Hz (other voltages and frequencies available on request)
Power con- sumption MBR plant kW 9 19 26 36 42 65 83
Recirculation pump*2, *3 0.75 1.1 1.1 1.5 2.2 3 4
Irrigation pump*2 0.75 1.5 2.2 2.2 7.5 7.5 11
Footprint FRP bioreactor(s) & access platform(s) m 6 x 3.2 9 x 3.2 12 x 3.2 12 x 3.2 12 x 5.6 12 x 8.8 12 x 12
Containerised plant room m N/A*4 6 x 2.4
Sludge tank(s) m Ø1.6 Ø2.6 Ø2.97 Ø3.57 Ø3.95 7.7 x 3.55 8.5 x 3.95

 

Characteristics Units Influent Effluent
Temperature °C 15~35 -
pH*5 pH units 7.0~8.5 6.5~8.5
Biological oxygen demand (BOD)*6 mg/L 150~400 <10
Suspended solids (TSS) mg/L 150~300 <10
Emulsified oil and grease mg/L <2.0 -
Free oil & grease mg/L <0.1 -
Total nitrogen (T-N) mg/L <50 <40 (or <10 mg/L reduction from influent value)
Total phosphorus (T-P) mg/L <16 4~12 (variable according to coagulant dose rate)
Total dissolved solids (TDS) mg/L <2,000 -
Turbidity NTU - <2 (95%ile)
E.Coli cfu/100 mL - <1
Coliphages pfu/100 mL - <1
Clostridia cfu/100 mL - <1
Free chlorine mg/L - 0.2~2
UV dose*2 mJ/cm2 @ 70% UVT   40
Bacteria removal (membrane only) Log   ≥4*7
Virus removal (membrane only) Log   ≥1*7

*1 Sold separately, *2 Optional equipment, *3 Sizing based on recommend treated effluent tank volume, *4 Plant room integral to FRP bioreactor, *5 Caustic dosing may be required where influent pH is <7.0, *6 Sucrose dosing may be required where ratio of BOD to TKN is ≤5, *7 Additional log credits are available with UV and chlorination; consult MAK Water

STANDARD INCLUSIONS + OPTIONS

✓= Standard Supply, o = Optional Supply, - = Not Available

Equipment MBR-020 MBR-045 MBR-060 MBR-075 MBR-155 MBR-225 MBR-315
Automatic inlet screen (2 mm in two dimensions)
Influent mixing pump
Influent feed pump
FRP bioreactor(s) with aluminium access platform(s) & ladder(s) Aerobic zone with submersible aerator & MLR pump
MBR zone with flat sheet membranes and submersible RAS/WAS pump
CIP/membrane flush tank
Bioreactor roofing (COLORBOND® steel sheeting) o o o o o o o
Plant room with air conditioning, overhead lighting & GPOs for maintenance Chemical dosing Coagulant
Hypochlorite
Sucrose o o o o o o o
Caustic o o o o o o o
MBR permeate pump
Treated effluent tank recirculation pump o o o o o o o
Pressurized UV reactor (non-validated*1) o o o o o o o
PLC control system with touch screen HMI
Externally mounted MBR air scour blower
Sludge tank with supernatant sampling points & discharge valves
Supernatant sump with submersible pump & level control o o o o o o o
Irrigation pump with level control & mechanical flow totaliser / flow transmitter o o o o o o o
Instrumentation Standard package
Premium package with ClearAccessTM remote monitoring o o o o o o o

 

Instrumentation & Controls Standard package Premium package
Level switches Balance, bioreactor and treated effluent tank -
Chemical dosing & sludge tank float level switches
Level transmitters Balance, bioreactor and treated effluent tank -
Pressure transmitters Membrane differential pressure
Pressure switches and gauges
Flow transmitters Influent feed, MLR and RAS/WAS
Permeate and irrigation pump (with optional irrigation pump) -
Flow indicator Permeate flow -
Mechanical flow totaliser Irrigation pump (with optional irrigation pump) -
Analysers Aerobic zone dissolved oxygen
Aerobic zone pH analyser -
MBR zone mixed liquor suspended solids -
Permeate turbidity -
Permeate pH and free chlorine -
UV intensity sensor (with optional UV steriliser) -
Variable speed drives Influent feed pump -
Submersible aerator
MLR pump -
RAS/WAS pump -
MBR permeate pump -
ClearAccessTM remote monitoring & control capabilities -