Teaching Renewable Energies and Sustainability in the School of Diogo Vaz (São Tomé, Africa)

This work aims to show how sustainability and renewable energies could benefit a rural area of Africa (in São Tomé) by means of using solar energy and biogas. Applying these technologies requires ingeniousness and little founding, the favourable outcomes are becoming less dependent of fossil fuels (wood, coal and gasoline) while saving time and, more importantly, the forest. We have taught how to design, build and operate systems for cooking, lighting and water-heating that use renewable sources of energy.

Biodigestores Familiares - Guia de Diseno y Manual de Instalacion
Jaimie Marti Herrero, Proagro/GTZ, Bolivia Noviembre 2008
Biodigestores de polietileno tubular de bajo costo para tropico, valle y antiplano

Biodigestor Familiar
Biodigestor Familiar

The Introduction of Low-Cost Polyethylene Tube Biodigesters on Small-Scale Farms in Vietnam
Bui Xuan An* Thomas R. Preston** Frands Dolberg*** 1997, 1998

In order to evaluate polyethylene tubular digester development in Vietnam, interviews were carried out in Thuan An district and at two extension centers. Data of design parameters, gas production, economic aspects, farmers' participation, technical problems and methodologies of biogas development were collected. The technology was appealing to the rural people because of its low costs, fast payback, simplicity and positive effect on pollution. The finding pointed to the importance of farmers’ participation for technical feedback, plant maintenance, plant repair and teaching of other farmers. The dissemination of the technology needs the selection of real farmers with high fuel demands as demonstrators, the support of a credit system for the poor farmers and strengthening farmer-extension-scientist relations. Follow-up research should be focused on on-farm studies, particularly the use of the slurry.