| The elaboration, and chemical, physical and biological properties of compost made of organic wastes from a slaughterhouse (SHW) plant were evaluated. Freshly cut (FYT) and semi-decomposed (SCYT) yard trimmings were evaluated as bulking agents (BA). Treatments consisted of combinations of BA (FYT and SCYT) with layers of SHW (none, single or double). All treatments combinations composted well and exhibited thermophillic temperatures after three days of composting. Chemical composition (pH, organic matter, OM; inorganic matter, IM; carbon, C; and nitrogen; N, content) varied depending BA and layers of SHW throughout the composting phases. However, the use of SCYT as BA resulted in greater N content and lower OM than FYT. The SHW composted in double layers resulted in a higher N content than none or single layers of SHW. However, even though it reaches higher temperatures, experimental analyses suggest that a longer period of time is needed to decompose it. (Abstract shortened by UMI.)... |
