Composting: The controlled biological decomposition of organic material, such as sewage sludge, animal manures, or crop residues, in the presence of air to form a humus-like material. Controlled methods of composting include mechanical mixing and aerating, ventilating the materials by dropping them through a vertical series of aerated chambers, or placing the compost in piles out in the open air and mixing it or turning it periodically.

 

Related Words

Composting: The controlled biological decomposition of organic material, such as sewage sludge, animal manures, or crop residues, in the presence of air to form a humus-like material. Controlled methods . . . View Full Definition

Source Reduction: The design, manufacture, purchase, or use of materials (such as packaging) that reduce the amount or toxicity of garbage. Source reduction can reduce waste disposal and handling costs becaus . . . View Full Definition