during composting, a favourable environment or condition
must be provided. The favourable conditions and appropriate loading of microbial nutrients, as well as the non existence of harmful toxic compounds, are essential to reach high microbial degradation. The physical and chemical characteristics of composting raw materials are presented in Table 1. In general, most of the values for the parameters for rice straw are within the ranges obtained by Iranzo et al. [10] except for the Cu for which the values are a little high. The pH values of rice
straw (7.6) were also in a similar range as obtained by previous studies[11,12], as were the pH values for goat manure (7.1) and green waste (8.4), which indicates that these residues are non-acidic.