Composting has long been recognized not only as a means of safely treating solid organic wastes but particularly as a form of recycling of organic matter. Composting will increasingly play a significant role in future waste management schemes since it offers the means of re-use of organic material derived from domestic, agriculture and food industry wastes. The increased interest in composting derives from the growing awareness of the many environmental problems associated with some of the main ways now practiced for treating solid organic wastes, e.g. incineration and landfilling. The overwhelming majority of municipalities and individuals are opposed to having incinerators and landfill sites established within their communities.