WWTP & biogas - Colun

La Unión, Chili

Capacity: 1,100 m³/day


COD load :1,550 mg/l COD


Biogas production : 545 Nm³/day

Anaerobic water treatment
Upflow anaerobic sludge blanket
Technical design
Three-phase separators

Partnering up with Ecopreneur Chile S.A., we offered a WTTP to Colun, a dairy processing company in Chile. The treatment system consists of several main components:

  • Equalisation tank
  • DAF (Dissolved Air Flotation)
  • Anaerobic water treatment
  • MBR (Membrane Bio Rector)
  • UV disinfection

The new WWTP is part of the plans for a new factory, with Colsen taking responsibility the technological and technical design of the anaerobic water treatment system. These designs were later finalised by local suppliers.

Anaerobic water treatment design

The anaerobic water treatment system was designed as a UASB (Upflow Anaerobic Sludge Blanket). The robustness and relative simplicity of UASB reactors have a wide range of benefits for clients over the course of system’s lifespan, both in terms of maintenance and operational management.

Separation of wastewater, sludge & biogas

Colsen also supplied the three-phase separators (settlers) and a biogas torch. The settlers separate the wastewater, sludge and biogas, with the latter being captured for further checks and testing. The biogas produced by the system is burned with the torch, after which the end user can decide whether the biogas can be put to good use, such as in a steam boiler or CHP system.


Anaerobe waterzuivering Colun

Would you like to know more?
Ask Jurgen

Jurgen Brekelmans, Managing Director