Also listed under organic waste processing, the same digester's biogas output burned directly at a stove burner or gas lamp in place of firewood or bottled propane, via a gas-appropriate burner (different jet sizing than propane). Given Normandy's climate, realistically needs the digester kept warm or insulated to sustain output through winter, see that entry for the temperature constraint. Once gas reaches the storage bladder it's available on demand like any bottled gas; it's the underlying production rate that varies seasonally, not moment-to-moment control.
Note: Cost, carbon and footprint are rated against the other options for this same need, not in absolute terms.
Same winter-performance caveat as the household biodigester
No sizing or quantities: how much a technique yields, and how much a household needs, both depend on the build and the people, so the catalogue compares options rather than dimensioning them. It carries no bill of materials and no build sequence, and it is written for an oceanic, clay-soil climate (Normandy, France). Regulatory notes are indicative and need confirming locally.