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 | Open letter to Johannesburg Summit                           
      February
2002 Division for Sustainable
Development, United Nations
 Presented for the PREPCOM 2,  28
January - 8 February 2002, New York, USA
 By
Fax to: 1-917-367 2341 and to all delegates,
observers, NGOs and journalists
 (please distribute
further to support this initiative)
   Sustainable
Sanitation is a key to
Sustainable Development!
        Conventional
sanitation can only
operate with high water consumption Conventional
sanitation has been
developed without consideration of water and fertiliser reuse thus
depriving
the served region of valuable resourcesMixing the small
amount of
dangerous faecal matter with large amounts of water spreads pathogens
to
receiving waters - often without treatment as it can be seen all around
the
worldConventional
sewerage systems do
flood the streets with raw wastewater in countries with heavy rainy
seasons in
too many cases              
          (just to name a
few of the many problems)   
   
        Sustainable
sanitation is designed
for low water consumption (demand
side management) and aims for full reuse
of water and fertiliserSustainable sanitation is often
based on source control of faecal matter to
secure highest hygienic standards and keep it apart from freshwaterSustainable sanitation is adaptable
to the socio-economic conditions trough the use of high- to low-tech
technologiesSustainable sanitation allows economic water
reuse by separate
collection and treatment of greywater, the fraction of wastewater not
polluted
with feacal matterSustainable sanitation is often
decentral and is capable to provide high
performance at low costs – user involvement and proper maintenance
is a key
to success 
 Please do consider these key issues for sustainable
developement for the
Johannesburg summit!
   Prof. Dr.-Ing. Ralf Otterpohl
(responsible and available for further
information)    otterpohl@tuhh.deProf. Dr. Willi Gujer   
      gujer@eawag.ch Swiss
Federal Institute of
Technology,
Member of directorate of Swiss Federal Institute for
Environmental Science and Technology, EAWAG, Duebendorf,
SwitzerlandDirctor,
Institute of Municipal and Industrial Wastewater
Management, TUHH, Technical University Hamburg, Germany
 Tel. +49-40-42 878-3007,
 cellphone +49-173-21 62
048        (mail
your support, too)
 Prof. Dr.-Ing. Peter Krebs     pkrebs@rcs.urz.tu-dresden.deDirector, Institute
for Urban Water Management, Dresden University
of Technology, Germany
      Prof.
Dr. Mogens Henze   mh@IMT.DTU.DK Professor, Head of Department
Environment & Resources DTU, Technical University of Denmark
 
 Prof. Dr. Heinz A. Preisig   
      H.A.Preisig@tue.nl
 Professor of Systems & Control
Technical University Eindhoven, Eindhoven, The Netherlands
 
   Prof. Dr.-Ing. Raimund Haberl   raimund.haberl@boku.ac.atProf.
Dr.-Ing. Peter Wilderer   Peter.Wilderer@bv.tu-muenchen.deDirector,
Institute of Water Provision, Dept. Sanitary Engineering, Univ. of
Agricultiure, Vienna, Austria
 
 Director, Institute of Water Quality Control & Waste Managment,
Technical
University Munich, Germany
 
 Prof. Dr. Goen Ho   ho@essun1.murdoch.edu.au
 Director, Environmental Technology
Centre,
Murdoch University, Perth, Australia
 
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