1.Primary Settlement Zone (Anaerobic)
Wastewater enters the primary settlement tank where solids and heavy particles including non-biodegradable items settle and consolidate into sludge, which requires periodic removal. Liquid containing suspended particles rise upwards and into the Primary Bioreactor.
2.Primary Bioreactor (Anoxic)
The primary bioreactor provide pre-treatment where the discs rotating at approximately 1.5RPM allow oxygen to be absorbed into the developing biofilm and naturally occurring bacteria attach to the discs.
3.Patent Pending Flow Control System
The Flow Control System manages the forward flow by means of baling devices attached to the media assembly to transfer a pre-determined volume of partially treated effluent into the secondary bioreactor.
4.Secondary and Third Bioreactors (Aerobic)
Liquor entering these zones is exposed to a further bank of discs on which grow a matrix of bacteria. Safeguarded from flow variations and harmful contaminants, the bacteria efficiently use the nutrients in the effluent as a food source. The rotation of the discs create a gentle flow path within the disc zones to move wastewater along the zone while sloughing ageing and surplus biomass from the discs, creating space for new bacteria to develop.
5.Final Settlement Zone
The treated effluent from the bioreactors is displaced into the final settlement zone where suspended solids and active biomass is separated from the liquor and periodically returned to the primary settlement zone. An integrated skimmer removes surface pollutants. The clarifier supernatant is displaced into the Tertiary Polishing Filter
6.Tertiary Polishing Filter
The BIOROCKĀ® tertiary polishing filter further removes residual suspended solids and pollutants without additional energy. In certain applications the tertiary polishing tank is used as a contact tank with a gravity discharge.
7.Disinfection
The final treated effluent is pumped through the optional UV disinfection unit.

The system incorporates all unit processes, including primary settlement, anaerobic digestion, anoxic and aerobic treatment, final settlement, polishing and disinfection in a single vessel (for smaller communities), or with a primary collection tank to extend desludge intervals (typical of larger communities). It can be configured either as a stand-alone unit, or with suitable flow diversion, in parallel unit processes. The patent- pending Flow Control System improves processes performance by buffering peak flows, whilst the tertiary polishing filter provides for consistent excellent final effluent.

Model MR150 MR250
Operating Loads
PE 150 250
Maximum dailyBOD (kg) 9 15
Maximum daily Ammonia- Nitrogen (kg) 1.8 3
ADWF (m3) 25 40
PDWF (m3) 40 50
Nitrogen Removal Efficiency >95% >70%+
Dimensions & Weight
Overall Length(mm) 6,058 6,058
Overall Width(mm) 2,438 2,438
Overall Height(mm) 2,896 2,896
Mass (Dry/Operational) (kg) 4,000 / 40,000 4,000 / 40,000
Inlet Invert Depth(mm) 1,100 1,100
Depth below inlet invert (mm) 1,560 1,560
Outlet InvertDepth (mm) 1,495 1,495
Depth below outlet invert (mm) 1,165 1,165
Bioreactor
Disc Material Virgin Polypropylene Virgin Polypropylene
Disc Diameter(mm) 1,800 1,800
Total Media Area(m2) 1,700 1,700
Vessel
Construction Factory welded steel Factory welded steel
Primary Settlement Tank Sludge Storage 6 6
1.Primary Settlement Zone (Anaerobic)
Wastewater enters the primary settlement tank where solids and heavy particles including non-biodegradable items settle and consolidate into sludge, which requires periodic removal. Liquid containing suspended particles rise upwards and into the Primary Bioreactor.
2.Primary Bioreactor (Anoxic)
The primary bioreactor provide pre-treatment where the discs rotating at approximately 1.5RPM allow oxygen to be absorbed into the developing biofilm and naturally occurring bacteria attach to the discs.
3.Patent Pending Flow Control System
The Flow Control System manages the forward flow by means of baling devices attached to the media assembly to transfer a pre-determined volume of partially treated effluent into the secondary bioreactor.
4.Secondary and Third Bioreactors (Aerobic)
Liquor entering these zones is exposed to a further bank of discs on which grow a matrix of bacteria. Safeguarded from flow variations and harmful contaminants, the bacteria efficiently use the nutrients in the effluent as a food source. The rotation of the discs create a gentle flow path within the disc zones to move wastewater along the zone while sloughing ageing and surplus biomass from the discs, creating space for new bacteria to develop.
5.Final Settlement Zone
The treated effluent from the bioreactors is displaced into the final settlement zone where suspended solids and active biomass is separated from the liquor and periodically returned to the primary settlement zone. An integrated skimmer removes surface pollutants. The clarifier supernatant is displaced into the Tertiary Polishing Filter
6.Tertiary Polishing Filter
The BIOROCKĀ® tertiary polishing filter further removes residual suspended solids and pollutants without additional energy. In certain applications the tertiary polishing tank is used as a contact tank with a gravity discharge.
7.Disinfection
The final treated effluent is pumped through the optional UV disinfection unit.

The system incorporates all unit processes, including primary settlement, anaerobic digestion, anoxic and aerobic treatment, final settlement, polishing and disinfection in a single vessel (for smaller communities), or with a primary collection tank to extend desludge intervals (typical of larger communities). It can be configured either as a stand-alone unit, or with suitable flow diversion, in parallel unit processes. The patent- pending Flow Control System improves processes performance by buffering peak flows, whilst the tertiary polishing filter provides for consistent excellent final effluent.

Model MR300 MR600 MR900
Operating Loads
PE 300 600 1,000
Maximum dailyBOD (kg) 15 24 36
Maximum daily Ammonia- Nitrogen (kg) 3 4 5
ADWF (m3) 40 60 90
PDWF (m3) 50 80 120
Nitrogen Removal Efficiency >95%+ >70%+ >30%+
Dimensions & Weight
Overall Length(mm) 12,192 12,192 12,192
Overall Width(mm) 2,438 2,438 2,438
Overall Height(mm) 2,896 2,896 2,896
Mass (Dry / Operational) (kg) 6,500 / 60,000 6,500 / 60,000 6,500 / 60,000
Inlet Invert Depth(mm) 1,100 1,100 1,100
Depth below inlet invert (mm) 1,560 1,560 1,560
Outlet InvertDepth (mm) 1,495 1,495 1,495
Depth below outlet invert (mm) 1,165 1,165 1,165
Bioreactor
Disc Material Virgin Polypropylene Virgin Polypropylene Virgin Polypropylene
Disc Diameter(mm) 1,800 1,800 1,800
Total Media Area(m2) 2,800 2,800 2,800
Vessel
Construction Factory welded steel Factory welded steel Factory welded steel
Primary Settlement Tank Sludge Storage 10 10 10