Functionality:
The plant always includes:
- Primary cleaning stage
- Fluidised bed reactor
- Secondary sedimentation chamber
In the FBS there are free floating support medium (small plastic form parts) or particles (produced from UV-stabilised polyethylene), on which bacteria grow. A biological layer (micro-organic colonisation) forms on this medium after a start-up period. The biofilm which consists mainly of aerobic organisms, transforms the organic contaminants contained in the wastewater into sedimentary and mineral substances. The wastewater is serrated intermittently and the aeration system installed in the tank supplies the organisms with sufficient oxygen and in addition, the aeration process causes a current that moves the fliud containing the biofilm medium and the entire content of the reactor is blended.
This technology requires no rotating parts in the wastewater. Return sludge is transported via maintenance-free airlift-pump, operated with compressed air. The blower supplying the oxygen is placed outside the container near the control cabinet.
Mechanical cleaning stage:
Prior to the FBR biological stage, the raw wastewater is separated in this first stage by either mechanical separation or primary settlement depending on the project size. Particles in the wastewater that are smaller than 3mm pass through the screen and enter the FBS. The natural wastewater accumulation flows freely through the plant. An integrated restriction valve controls wastewater flow to prevent shock loading and to make sure that the flow is equalised in order to optimise the physical and biological processes.
Fluidized bed reactor:
In the fluidized bed container there are free floating support media (small plastic form parts) or particles (produced from UV-stabilised polyethylene), on which bacteria grow. A biological layer (micro-organic colonisation) forms on this medium after a start-up period. The biofilm which consists mainly of aerobic organisms, transforms the organic contaminants contained in the wastewater into sedimentary and mineral substances. The wastewater is aerated intermittently and the aeration system installed in the tank, supplies the organisms with sufficient oxygen. The aeration also causes a current that moves the fliud containing the biofilm medium and the entire content of the reactor is blended.
This technology requires no rotating parts in the wastewater. Sludge is transported via a maintenance-free airlift-pump, operated with compressed air back to the primary settlement zone. The blower supplying the oxygen is placed outside the container near the control cabinet.
Secondary sedimentation chamber:
In the secondary sedimentation chamber, the cleaned wastewater is separated from the bio mass by sedimentation. At preprogrammed intervals, an airlift-pump returns sedimented biomass as surplus sludge back into the pre-chamber as programmed.
Benefits of fluidized bed plants:
- Low sludge volume
- Good cleaning performance
- Good cleaning performance even with underload
- Simple retrofitting possible
- Maintenance required only once per year
- Proven system
The main advantage of a ClearFox fluidised bed procedure is the high biomass concentration (>21gTS/L) which allows for a small reactor design. This saves costs while reaching a high cleaning performance.
Certificates:
The ClearFox FBS in modular construction
Ready to connect and fully biological application
Compact, modular structured small sewage treatment plant with minimal technical components and high-quality clog-free airlift-pump for sludge. No calibration required as this is done automatically. Ventilation with durable membrane technology. Hose connection pieces made of stainless steel (no fracturing possible).
The control unit is integrated into the ventilated manhole pit. Therefore no hose laying in the ground required.
Only an inlet, outlet and a power cable (earth cable 3×1,5mm2) must be connected. No further connection work required!
Inlet and outlet openings prepared for KG DN100 (high-quality EPDM-gaskets already integrated into the tank). The monolith tanks are made of high-quality PE in rotational moulding in one single piece and do not need to be screw-connected!
The vertically positioned rib structure ensures good and ergonomic blending in the reactor. The tanks are equipped in their basic configuration with a manhole pit extension for an inlet depth of ~780mm.
The tank covers (load-bearing up to 200 kg) are screw-tightened (childproof version).
The plant is CE conforming and includes EN 12566-3 test certificates for efficiency, water-tightness and fracture resistance. The plant consists of two interconnected tanks which can be placed as one piece into the building pit.
All technical components of the plant are pre-assembled in the factory ready to be connected (plug and play). The tanks are equipped with additional reinforcements made of stainless steel. Product: fully biological FBS small sewage treatment plant
Dimensions and technical data:
- 1 PE tank, 3500 litres
- Chamber 1: Sludge storage and buffer
- Chamber 2: Fluidised bed bio reactor
- Chamber 3: Secondary sedimentation with sludge chute
- Individual weight: approx. 220 kg
- Dimensions: 2430 x 1215 x 1710 mm (l x w x h)
- Separation of the chambers by means of partitions
- Required base area: ~2430 x 1220 mm
- Max. inlet depth: 1000mm below area surface
- Access opening tank: 600mm
- Plant size: 4 – 5 PE (residents)
- Power supply: Earth cable with 230 VAC, 3 x 1.5mm2, installed by the customer
- Fuse 10A, residual current operated circuit breaker
- Control cabinet: Control module integrated in manhole pit
- Connected power: ~50W
- Outlet class: C (according to German classification)
