Egypt together with CDI, WageningenUR: research into improving water quality for fish farming (Tilapia)
Thailand
together with CMU, Chang Mai University: guest lecturer, building a test set-up for scientific research
Ethiopia
together with Alterra, Wageningen UR: pilot project that led to the Zero Liquid Discharge project at Sher Ethiopia.
Later also with FinishMondial: research on wastewater treatment for single residential complexes
Indonesia
together with Deltares: a project regarding purification of rainwater runoff
Kenya
together with World Wildlife Fund and UNESCO-IHE: giving a series of courses on the design and construction of Constructed Wetlands
Europe, USA, Middle East, Asia
as a source of information for, or supervisor of, various students (from Peru, Urugay, USA, Europe, Nepal, Thailand)