Sustainable irrigation development in the White Volta sub-Basin disseration submitted in fulfilment of the requirements of the Board for Doctorates of Delft University of Technology and of the Academic Board of the UNESCO-IHE Institute for Water Education for the degree of doctor, to be defended in public on Tuesday, 13th December 2011 at 12:30 hours in Delft, The Netherlands

Effect of algal biofilm and operational conditions on nitrogen removal in waste stabilization ponds thesis submitted in fulfilment of the requirements of the academic board of Wageningen University and the academic board of the UNESCO-IHE Institute of Water Education for the degree of doctor to be defended in public on Friday, 28 January 2011 at 10.00 a.m. in Delft, The Netherlands