BORDA-DEWATS wastewater treatment in the urban context of Kabul, Afghanistan


dewatsThe principal objective of this document is to assess the scaling-up-potential of DEWATS technology and to identify bottle-necks which need to be addressed to improve sanitation in an urban environment that is widely deprived from proper sanitation services.
The following assessment is based on the Technology-Applicability-Framework (TAF) developed by Skat, Switzerland and was conducted in Kabul, Afghanistan in 2015.

BORDA-DEWATS constitutes the treatment element of a sanitation concept that starts with the individual user interface, the toilet, and continues with a simplified sewer system that connects a neighbourhood of less than 10 households up to a few hundred households. The collected wastewater then enters the treatment stage. Solid matter sediments under anaerobic conditions and decomposes by producing small quantities of inert sludge and methane. Ideally, the gas could be collected and used.


The assessment reveals that BORDA-DEWATS has a significant potential for scaling-up. Among the six different “sustainability dimensions” the Social, the Environmental, the Skills & Know-how as well as the Technology are very much in favour of that technology.
For different reasons the Economic and especially the Institutional & Legal aspects seem to fall behind.

Hassib, Y. (2015). Recommendations concerning the scaling-uppotential of BORDA-DEWATS wastewater treatment in the urban context of Kabul, Afghanistan.