Manure composting as an option for utilization and management of animal waste

The potential of manure composting as a waste utilization and disposal option for animal waste has been evaluated on the basis of the operation of a pilot plant capable of handling 15 Mg animal manure daily. Animal manure mucked-out dry from livestock farms was subjected to high-rate composting processes which produced the mature product in less than two months. The composition and quality of the manure compost at various stages of operation were assessed. Results showed that the mature manure compost produced under controlled conditions is a stable and odour-free produce with a carbon:nitrogen ratio of about 15 and moisture content of about 50%. Field trials further demonstrated that the manure compost is suitable for use as a soil conditioner for landscaping, tree planting and market gardening applications. Cost comparison with other waste recycling and disposal alternatives indicated that manure composting is one of the most cost-effective options for dealing with animal waste.