I am happy to announce that Issue 21 of Sustainable Sanitation Practice (ISSN 2308-5797) on "Sludge treatment" is published and can be downloaded free of charge now from www.ecosan.at/ssp/

The three papers presented are:
• The new sludge treatment line that is currently implemented at the Vienna main wastewater treatment plant (the contribution summarises public available material),
• Markus Lechner describes the design of the first sludge drying reed bed in Montenegro, and
• Magdalena Bäuerl et al. present results of the project FaME on resource recovery from faecal sludge in Sub-Saharan Africa.

best regards,
Guenter Langergraber
Editor SSP journal