WASTE NOT WANT NOT

Novel biological production processes can be utilised to convert waste materials, such as cellulose, crop residues and animal excreta, to products which can be sold or used within agriculture. Some of these biological processes may involve the use of enzymes, bacteria or fungi and may need to be carried out in the controlled conditions of an industrial plant. Unorthodox animals may also be used and with them the degree of control required may be less — or the cost of achieving it less. Costs could be minimised by using very simple methods and cheap equipment.