One chicken, ne Watt... Poultry litter as an alternative fuel

摘要

More than 50 billion chickens are reared annually as a source of food for their meat and eggs. Chickens farmed for meat are called broiler chickens, whilst those farmed for eggs are called egg-laying hens or layers. The UK alone consumes over 29 million eggs every day and some hens can produce over 300 eggs a year. Chickens will naturally live for six or more years, but after 12 months, the hen's productivity will start to decline and this is the point when most commercial laying hens are slaughtered.