The dry fractionation of fats from piggish fleshing wastage

The paper presents the result of recovery researches by dry fractionation of piggish fleshing wastage obtained as waste in pigg buff processing (tanning). Valuable material wearers of fatty fractions [C12:0, C14:0, C14:1, C16:0, C16:1, C18:0, C18:1, C18:2, C18:3, C20:0, C22:0, C24:0], the piggish fleshing wastage can negatively affect, by non-processing, ecological and financial the costs of tanned leather. After raw and fine hot filtration, the individually piggsh fat (saponifiable and unsaponifiable) is crystallized fractionated in the next operating protocol, which permitted the establishing of relationships between physical – chemical major parameters and work parameters.
Liquid (fluids) and solid fractions, adequate thermostated centrifugal separated were physical – chemical evaluated (aspect, density, melting range, refraction index, static and dynamic viscosity, acidity index, esterification, iodine, saponification and gas-chromatography distribution) to evaluate and optimize the efficiency of controlled isolation of a superior acid dictated previously. The most reach fatty fraction was multiple fractioned crystallized with gradients, respectively at lower temperature ranges. After repeated separations were registered analytical purities.
It was conferred an important attention to environment and/or agropedoclimatic characteristics of processed piggish fleshing wastage provenience geographic areas by following the trophic chain soil – herb (forage) – animal (pigs). There were determined the evolution and the weight transfer of heavy metallic cations [Mn, Zn, Cu, Co, Ni, Cr, Pb, Cd] in these bangles. The Chromium cation, present mainly in technological processing phase (tanning) got the most attention. It was used the biologic material afforded by two private pigg farms (agro-industrial associations) with integrated processing (growing, sacrifice, classic and unconventional technological processing) from the South – West of Romania (counties Timiş and Caraş – Severin), first one situated in a geographic area without geogenic pollution with heavy metals and the second area more geogenic and antropic polluted with heavy metals cations, situated near a power-station, respectively underground mining. The balance of heavy metals cations in the analyzed system by their presence under the international accepted limits justifies the researches and encourages their extending in the future.