Category
page 1Biogas substrates
pomace
thumb|right|250px|Pomace in a bladder press. These are [[Chardonnay grapes left over after pressing.]]
press cake
solid block remaining after pressing to extract liquids
biodegradable waste
Waste that can naturally decompose, such as food scraps, peels, or fallen leaves.

Sorghum ×drummondii
nothospecies of plant, Sudan grass

Mangelwurzel
Mangelwurzel or mangold wurzel (from German Mangel/Mangold, "chard" and Wurzel, "root"), also called mangold, mangel beet, field beet, fodder beet and (archaic) root of scarcity, is a cultivated root vegetable. It is a variety of Beta vulgaris, the same species that also contains the red beet (beetroot) and sugar beet varieties. The cultivar group is named Crassa Group. Their large white, yellow or orange-yellow swollen roots were developed in the 18th century as a fodder crop for feeding livestock.
liquid manure
animal waste thinned with water and used as fertilizer
sewage sludge
by-product of sewage treatment

Black liquor
By-product from the Kraft process for making paper pulp
beet pulp
byproduct of beet processing used as fodder for livestock