Dom, 11/06/2006 / Jue, 15/06/2006

American Water Works Association

Dom, 17/09/2006 / Mié, 20/09/2006

American Water Works Association

Mié, 29/06/2005 / Jue, 30/06/2005

Mar, 12/09/2006 / Jue, 14/09/2006

Chartered Institution of Water and Environmental Management (CIWEM)

Dom, 28/08/2005 / Mié, 31/08/2005

Water Enviroment Federation (WEF), European Water Association (EWA), Japan Sewage Works Association (JSWA), California Water Environment Association (CWEA)

Mié, 28/09/2005 / Mié, 28/09/2005

Mar, 06/09/2005 / Jue, 08/09/2005

Chartered Institution of Water and Environmental Management (CIWEM)

Jue, 01/12/2005 / Vie, 02/12/2005

Association of Wastewater Treatment Experts(AWWTE), International Water Association (IWA), Global Water Partnership(GWP), European Water Association (EWA)

Dom, 10/09/2006 / Jue, 14/09/2006

International Water Association

Lun, 06/02/2006 / Mié, 08/02/2006

Dechema