SNV Bolivia inaugurates anaerobic wastewater treatment plant in Cliza, Bolivia

Posted on 13 October 2014

The first wastewater treatment plant in Cliza, Cochabamba, Bolivia was inaugurated by SNV Bolivia on 18 September 2014. The new wwtp treats the waste water of 7,000 city-centre inhabitants.

The plant was built within the framework of the Dutch-based SNV Knowledge Network for Decentralised Sustainable Sanitation, with support from the Embassy of Sweden.

First treatment of sewage water
The new plant ends the discharge of the sewage water into the Cliza river.

"It is wonderful to have such a modern wastewater treatment plant that allows us to treat and reuse wastewater," Cliza mayor Abdón Suyo said during the inauguration. "The plant has state-of-the-art technology, not only for Valle Alto, but also at departmental and national level."

 CEO Gustavo Heredia (left) of Aguatuya starts up the process, joined by mayor Abdón Suyo of Cliza (second right).

Three-stage process
Once the wastewater reaches the treatment facility, it starts a three-stage process:
• pre-treatment, mechanical separation of plastic bags, diapers, sand, etc.
• primary treatment anaerobic fermentation in sealed containers
• secondary treatment in bio-filters (pools).
After this treatment, the water is re-used for irrigation.

The total investment for the plant was approximately 4 million bolivianos (460.000 euro), with 50% of the funding provided by the Embassy of Sweden and 50% by the Municipal Government of Cliza.

This news item was originally published on the websites of SNV and Aguatuya (in Spanish).

More information
SNV Bolivia
La Paz, Bolivia
The Hague, the Netherlands
+31 70 385 55 31

Video report of the inauguration of the wastewater treatment plant in Cliza, Bolivia (in Spanish)


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