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3K PLUS - Fixed-Bed Biological Treatment Plant
Since the early 90s, there is a nostrum for the fully biological treatment of wastewater in a 3-chamber or multi tank systems: The fixed-bed plant 3K PLUS has been one of the best-selling retrofit plants ever since. 3K PLUS is operating very stable, even with under loading and at low outside temperatures. 3K PLUS works with submerged fixed bed, which is completely surrounded by wastewater. The design provides an optimal microbial living space (determined in scientific testings). 3K PLUS works without any submerged rotating or electrical wear parts and offers a fail-safe system control in a separate cabinet.
1 The first chamber of the wastewater treatment plant is used for the separation of solids (primary treatment).
2 From there, the wastewater is fed for biological treatment into the second chamber. Aerators are fixed to the bottom of the second chamber, which mix the wastewater at regular intervals, with an exactly defined volume of air. The submerged fixed bed is installed on top of the aerators. The microorganisms available in the wastewater colonize on it. They form a biofilm, which meets best „working conditions“ by the presence of nutrients in the wastewater in combination with the determined aeration of the fixed bed.
3 Excess microorganisms are solved by the entraining air from the fixed bed again and again, and then flushed with the biologically treated water into the third chamber for secondary sedimentation. There they settle to the bottom as so-called excess sludge, which is led back to the first chamber of the primary treatment via a airlift, before the purified water leaves the wastewater treatment plant. Excellent Effluent Quality*:
- COD: 35,0 mg/l - 93,6 %
- BOD5: 4,0 mg/l - 98,4 %
- NH4-N: 5,1 mg/l - 85,8 %**
- Ntot.anorg.: 16,0 mg/l - 67,9 %**
- SS: 9,0 mg/l - 97,2 %
* Measured average values and determined efficiencies for 3K PLUS, Performance Class D, during the approval test in Germany by the independent experts at the Aachen Prüfinstitut für Abwassertechnik, short PIA.
**Average values obtained for temperatures ≥ 12 °C
The retrofitting of all pre-assembled modules is quick and easy realised through the tank opening. Tank installations are wearless.
- No electrically driven or rotating components in the wastewater.
- Total aging resistance of all components against domestic wastewater.
- “Garden friendly“ installation!
- In case of retrofitting an existing septic tank, your garden remains untouched.
- DIBt approval & CE compliant.
- Hardly a wastewater treatment system in Europe has been tested more frequently, so strictly and with such good results.
- Proven suitability for underloading!
- Especially suitable for permanently low wastewater inflow.
The 3K PLUS® in cylindrical plastic tanks of DEUTSCHEN DEWATEC offers a variety of product features, beyond compition. With 3 standard diameters it is ideally suitable for new installations as well as for retrofitting of existing concrete tank. A customized and tailor-made production for your requirements is possible. Easy installation by fully preassembled system – which leads to fault free installation and less time requirement for commissioning. Custom-fit to your existing underground tank - no need for excavation and heavy construction machinery.
Modular system: all components of the tank equipment are accessible without major installation efforts. Europ. Patent EP 1380545A1