2. Resources and substrates

Organic substrates for anaerobic digestion can come from a variety of sources. They fall into two main categories. The first is waste from human activity in the broadest sense, which can be defined as "loose material that its producer intends to dispose of". The second family is made up of production dedicated to energy recovery, such as vegetable or microalgal production.

On a given territory, waste production can come from different sectors:

• waste from domestic activities such as residual household waste;

• biowaste from selective collection from private households or from large-scale producers involved in food distribution (fairs, wholesale markets, retailers, etc.) and catering (commercial and institutional catering);

• green waste collected mainly...