One system’s waste is another’s raw material. Paulo realised this fact at an early stage in his permaculture development. Waste from domestic animals, food preparation and humans themselves can all be fermented by bacteria to produce biogas - flammable methane that can be used for heating, cooking and engines to run machines and generators . . . and then there is the sun . . . each year the earth receives twice as much energy from the sun as would be released by burning all the gas, oil and coal in the world and fissioning every last atom of uranium.
Jardim Angela Biogas
Published by Paulo on Jan 3, 2014
“...The latest update to the Solar Cities 3 IBC biodigester that has been installed with the Favela de Paz project in the Jardim Angela favela, Sao Paulo, Brazil. Still a few tweaks to go, but all in all it is starting to work well.”
Distiller Rocket Stove Test
Test of new variety of rocket stove Paulo designed for using with distillation equipment.
Tamera Stirling engine power
Solar collectors in a greenhouse heat oil to 150 Celsius. The hot oil is used for hot-plate cooking in the kitchen and also to drive this 1500 watt Stirling engine. Later designs are now capable of 5000 watts of mechanical power output, using cheap vacuum solar collectors.