Recommendations concerning the scaling-uppotential of BORDA-DEWATS wastewater treatment in the urban context of Kabul, Afghanistan

Hassib, Y. (2015)

Published in: 2015
Pages: 5

Author:
Hassib, Y.


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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. Two different products transmit from the treatment process:
(i) treated effluent with a residual Chemical Oxygen Demand (COD) of 170 to 320 mg COD/l that may be percolated into the subsoil or used for restricted irrigation or discharge into a surface water body with low sensitivity, and
(ii) stabilized sludge that could be used as soil conditioner.

With over thousand facilities this technology has proven its scalability in Indonesia. The situation is somewhat different in the Philippines, Vietnam or Tanzania, where numbers are
considerably lower. It is therefore worthwhile to assess the scaling-uppotential in urban Afghanistan.

Bibliographic information

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

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