Waste Water Treatment


representing the BIOCOS® Wastewater Treatment Plant System (Biological Combined System)

The BIOCOS main focus was to improve the conventional activated sludge system. The main differences between the BIOCOS and conventional systems is the sludge-water-separation and the sludge recycling.

The development strategy of BIOCOS was based on the intention to avoid disadvantages of the secondary clarification and the sludge recycle.

The main goal was to develop a wastewater treatment system with highest possible:

  • efficiency,
    • highest purification performance, by
    • reduction of volume and space
  • operational safety,
    • less mechanical equipment, less parts that wear out
    • short power outages can be tolerated smoothly
  • purifying performance and
    • nitrification and endogenous denitrification
    • biological phosphorus removal
    • additional reduction of COD
    • development of a floc filter ensuring solid free effluent quality
  • sustainability
    • emission value compliant with environmental law for biologically purified sewage
    • ability to use the odorless, fully biological purified outflow for irrigations

and lowest:

  • construction costs ,
    • only simple rectangular reactors with a flat bottom
    • savings of volume up to ~ 20%
    • savings of space up to ~ 50%
  • machinery,
    • no electrical devices under the water surface
    • only fine bubble aerators (rubber membrane) for a high oxygen input and
    • hydro- air- syphones (instead of electrical pumps) for water and sludge movements
  • energy costs,
    • savings of energy costs up to ~ 50%
  • maintenance requirements
    • savings of spare parts, personnel and time