Solar CITIES e.V. normally sets the wave in motion by joining receptive communities and building a small scale biogas system out of local materials.
In the summer of 2013 Culhane and Vasconcellos, joined by Insinkerator's Julio Porta, built a 500 liter biogas system in Niteroi at the old Creche (day care center) out of the typical Brazilian tapered open water tank just to show that it could be done.
The next visit Culhane made, he and Vasconcellos built an experimental 500 liter system out of a typical sealed water tank with the members of Alemao Verdejar.
These basic training opportunities in small scale biogas build confidence and familiarity with biogas before launching into a larger community size build.
Read more about our Vale Encantado work in English here http://www.rioonwatch.org/?p=10697 and here http://www.rioonwatch.org/?p=14254 and in Portugese here http://rioonwatch.org.br/?tag=vale-encantado, in articles by our Brazilian NGO partner Catalytic Communities.
Learn more about the Verdejar Alemao hand made solar hot water system here: https://www.youtube.com/watch?v=OyUW6-iVv6Y
For more on Verdejar as a sustainable community see: http://vimeo.com/44506517