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Introduction<br />
1 Introduction<br />
This brochure focuses on biogas production from different waste<br />
sources such as municipal biowaste collected by households, as well<br />
as industrial and commercial operations, sewage sludge and waste<br />
in the form of animal and vegetable by-products.<br />
Composting<br />
Anaerobic<br />
digestion<br />
Incineration<br />
Though energy and fertilizer production are central<br />
aspects of biogas technology, in many countries these<br />
are not the most relevant ones. Especially in countries<br />
struggling with overfilled landfills, biogas is an interesting<br />
technology <strong>to</strong> help solve the problem of municipal<br />
organic waste in cities, and <strong>to</strong> avoid contamination<br />
from industrial and commercial effluents.<br />
Composting offers the possibility <strong>to</strong> recover nutrients<br />
from organic waste but not energy, and incineration of<br />
this waste leads <strong>to</strong> an energetic recovery, but the nutrients<br />
are not recycled, because the remaining ash usually<br />
has <strong>to</strong> be landfilled. Anaerobic digestion constitutes<br />
both nutrients and energy recovery from organic waste.<br />
This makes anaerobic digestion an advanced recycling<br />
<strong>Biogas</strong> plant producing<br />
renewable energy and<br />
fertilizer for agricultural<br />
areas<br />
6
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