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We usually notice garbage around us is either collected and dumped in land fills or burnt . We thought , why not use this garbage to produce some sort of energy.
In garbage, except for plastic other substances containing carbon and hydrogen can be used as source of wood gas. Wood gas is produced from gasification process. Where we burn wood and other substances (garbage) anaerobically, producing wood gas. This can be done by using a double burner ,with inner container ,containing wood and garbage sealed air tight and outer container to burn garbage (like plastics etc. which can't be used to produce wood gas) to get sufficient heat.
The main components of wood gas are CO,CO2,H2 and CH4. This is a combustible gas which can be used as substitute of diesel in engines. Since tar comes as a by-product of this gas , it has to be filtered first.
Here we can use water to filter the tar out. But before sending the gas in water, it would be better to condense it. Which can be done by passing the gas through a long coil of metal tube (preferably copper tube, doesn't react to the gasses) and the gas coming out is ready to be used as fuel . The anaerobically burnt substance is coal, which can also be used as fuel. The other by-product tar is also useful product.
Gas sensors can also be used to sense the quality of the gas.
This is a simple and cost effective way of producing energy. Since garbage is usually burnt ,why not burn it in a proper way.