The Animal By-Products Regulations (No 1774/2002) (SI 1482/2003) allows for the treatment of some animal by-products

Animal by-products

Animal by-products are biodegradable wastes consisting of animal carcases, parts of animal carcases, products of animal origin which are not intended for human consumption, includes catering waste ....

 in composting and biogas plants (anaerobic digesters). The following article describes procedures required to allow solid outputs (compost

Compost

Compost is organic matter that has been decomposed and recycled as a fertilizer and soil amendment. Compost is a key ingredient in organic farming. At its most essential, the process of composting requires simply piling up waste outdoors and waiting for the materials to break down from anywhere...

, digestate

Digestate

Digestate is solid material remaining after the anaerobic digestion of a biodegradable feedstock. Anaerobic digestion produces two main products: digestate and biogas...

) from composting plants and anaerobic digesters onto land in the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

.

• Category 1: Very high risk
  Risk
  Risk is the potential that a chosen action or activity will lead to a loss . The notion implies that a choice having an influence on the outcome exists . Potential losses themselves may also be called "risks"...
  
  
• Category 2: High risk
• Category 3: Low risk

• BSE (Bovine spongiform encephalopathy
  Bovine spongiform encephalopathy
  Bovine spongiform encephalopathy , commonly known as mad-cow disease, is a fatal neurodegenerative disease in cattle that causes a spongy degeneration in the brain and spinal cord. BSE has a long incubation period, about 30 months to 8 years, usually affecting adult cattle at a peak age onset of...
  
  ) carcasses and suspects
• Specified Risk Material
• Catering waste from international transport

Must all be destroyed, not for use in composting or biogas plants

• Condemned meat
• Manure
  Manure
  Manure is organic matter used as organic fertilizer in agriculture. Manures contribute to the fertility of the soil by adding organic matter and nutrients, such as nitrogen, that are trapped by bacteria in the soil...
  
   and gut
  Gut (zoology)
  In zoology, the gut, also known as the alimentary canal or alimentary tract, is a tube by which bilaterian animals transfer food to the digestion organs. In large bilaterians the gut generally also has an exit, the anus, by which the animal disposes of solid wastes...
  
   contents

Can be used in composting and biogas plants after rendering (133C, 3 bar pressure)
Manure and gut contents only can be used after pretreatment

• Catering waste from households, restaurants
• Former food
• Much slaughter house waste e.g.