4. Conclusions
The characteristics of the grease trap wastes that were generated
during the production and processing of chickens were
remarkably varied, and this variability was due to the very different
schemes of waste management employed by the firms
involved. They varied in their physical characteristics and in their
content and composition of FOG; the waste from one firm contained
very little FOG. Most of the FOGs extracted from waste were
solids at temperatures below 40 C, contained only small amounts
of moisture, and substantial quantities of free fatty acids. A wide
range of fatty acids (free and esterified) was present in the FOGs
with palmitic, cis-9-oleic, cis,cis-9,12-linoleic, and stearic acids
predominating. However, utilization of these FOGs to prepare commercially
useful lipid products would have to be undertaken with
caution; several of them contained Cu and Pb, and a few were contaminated
with pesticides. Their content of potentially hazardous