GWT Gold Sponsor at the ICWS2022


icws22 lyon






WSP logo jpeg

Creating global solutions to local problems associated with climate change, urbanisation and water resource management, Orbicon has recently joined forces with WSP, contributing to the diverse offer of this leading multinational engineering group. With over 30 years’ experience in dewatering and mineralisation of sludge in sludge treatment reed beds (STRB), Orbicon acts as consultant, operator and service partner. Extensive experience in operation and maintenance makes Orbicon a natural collaborator for establishing, rebuilding and optimising facilities.

Areas of water treatment expertise:

  • Contaminated sites and groundwater remediation
  • Sludge dewatering and mineralisation

Steen 2020

The GWT contact at Orbicon is Steen Nielsen. Steen has a master’s degree in biology from Copenhagen University where he specialised in microbial ecology and the processes of conversion of organic material and nutrient salts in aerobic and anaerobic zones, especially denitrification. He has worked at Orbicon for more than 30 years, where he specialises in STRB with a focus on design, dimensioning, operation and emptying with respect to climate, type of sludge and quality. He has managed design, operation, emptying and handling for municipalities and utilities on more than 80 major projects in Denmark, Sweden, Norway, England, Ireland, Australia, New Zealand and Poland.

Steen has been a member of the IWA Group: Wetland Systems for Water Pollution Control since 1990. He is recognised internationally and has written and co-written more than 30 articles in international publications, travelling and presenting regularly at international conferences. He has led research projects in collaboration with The Danish Environmental Protection Agency, as well as Danish and international universities. Steen’s research and collaborations have resulted in the development of guidelines for establishment, operation and emptying of STRB.

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2630 Taastrup


+45 40 21 22 51






GWT events @ ICWS2022




7/11  9am  Anacleto Rizzo   (Keynote)

Wetland community expertise in the new Nature-Based Solution and Circular Economy vision: links and new research and design trends


7/11  10.40am  Dion van Oirschot

MULTISOURCE: Aerated wetland treating black and grey water for reuse at campsite Belgium


07/11   11:40am  Heike Hoffman

The potential of the French Wetland System for reuse - Results of a long-term project in the Peruvian arid coast area


7/11  4pm Heike Hoffman

Operational experiences with a sludge treatment wetland as part of a municipal WWTP in Brazil


7/11  4.30pm Fabio Masi

Water Projects Europe: NICE / MULTISOURCE


9/11  2pm Steen Nielsen

Treatment of industrial sludge in a pilot Sludge Treatment Wetland planted with Phragmites australis and Schenoplectus californicus


9/11  2pm Riccardo Bresciani

Reed beds for drying sludge from a winery wastewater treatment plant in Spain: the WETWINE project


9/11   4.40pm  Taxiarchis Seintos

Application of a full-scale UASB and two-stage constructed wetland system for water reclamation and nutrient recycling of domestic wastewater in arid areas


9/11  5pm Simos Malamis

Investigation of the use of different filling materials in unsaturated vertical flow constructed wetlands for the treatment of UASB effluent from domestic wastewater

T. Seintos, E. Statiris, F. Masi, C. Noutsopoulos, S. Malamis


9/11 5pm Scott Wallace

Practical aspects in the determination of first-order removal rate coefficients (k) for horizontal flow treatment wetlands


10/11 11.20am Fabio Masi

Electroactive and intensified pilot-scale constructed wetlands for the treatment of high loads of septic tank effluent


10/11 2.20pm Alain Petitjean

Intensified French Treatment Wetlands - Influence of operating parameters on nitrogen removal


10/11 4pm  Andy Freeman

Treatment of de-icer contaminated runoff at a UK airport using intensified Nature Based Solutions - A 10-year operational performance review



P4: Coupling French Reed Bed and Short Rotation Plantation for developing circular economy of wastewater in India: A case of PAVITR prototype / Anacleto Rizzo

P39: Constructed wetlands for the treatment of combined sewer overflow upstream of centralised wastewater treatment plants / Chiara Sarti