Biogas Yields

Biogas Yields Print E-mail


The yield of biogas from a particular feedstock will vary according to:

  • Dry matter content
  • The energy left in the feedstock, if it has undergone prolonged storage it may already have begun to break down
  • Length of time in the digester
  • The type of AD plant and the conditions in the digester
  • The purity of the feedstock

The table below shows data on the potential biogas yields of feedstocks commonly used in anaerobic digestion (numbers given in italics are taken from an AD calculator tool produced by NNFCC and The Andersons Centre, all other numbers are from Biogas from Energy Crop Digestion by the IEA). All figures are based on fresh weight unless stated.

FeedstockDry Matter %Biogas Yield m3/tonneFeedstockDry Matter %Biogas Yield m3/tonne
Cattle slurry 10 15-25 Potatoes - 276-400
Pig slurry 8 15-25 Rye grain - 283-492
Poultry 20 30-100 Clover grass - 290-390
Grass silage 28 160-200 Sorghum - 295-372
Whole wheat crop 33 185 Grass - 298-467
Maize silage 33 200-220 Red clover - 300-350
Maize grain 80 560 Jerusalem artich. - 300-370
Crude glycerine 80 580-1000 Turnip - 314
Wheat grain 85 610 Rhubarb - 320-490
Rape meal 90 620 Triticale - 337-555
Fats up to 100 up to 1200 Oliseed rape - 340-340
Nettle - 120-420 Reed canary grass - 340-430
Sunflower - 154-400 Alfalfa - 340-500
Miscanthus - 179-218 Clover - 345-350
Whole maize crop - 205-450 Barley - 353-658
Flax - 212 Hemp - 355-409
Sudan grass - 213-303 Wheat grain - 384-426
Sugar beet - 236-381 Peas - 390
Kale - 240-334 Ryegrass - 390-410
Straw - 242-324 Leaves - 417-453
Oats grain - 250-295 Fodder beet - 160-180
Chaff - 270-316


A comprehensive list of biogas yield data is available via the CROPGEN Database.  The full database contains data for 729 different feedstocks and is available to download in Access format from CROPGEN here (4th item on the table).

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