This document summarizes a presentation on bioenergy training about biogas. The presentation agenda includes current small-scale technologies focused on rural areas and current industrial examples of biogas production. For small-scale technologies, the document discusses feedstock types, pretreatment methods, transportation and storage, biogas upgrading techniques, and efficient heat use. Examples of good heat practices are provided. For industrial examples, the document discusses biogas production drivers, success cases of digesting own residues, and broadening feedstock materials. Specific industrial biogas plants are summarized as cases.