Composting

Biomasses may be animal (zoo-mass), vegetal (phyto-mass) or microbial, and play a key role as renewable energy sources...

Composting is a process whereby microorganisms cause different organic materials to decay and turn into humus...

Aerobic composting is the set of natural processes that cause the organic fraction of waste to decay...

The lack of oxygen makes the difference between this biological decomposition of organic sewage of animal origin and aerobic composting...