High-energy discrete processing in technology of extraction of wool grease

• Main Authors: O. Kunyk, O. Semeshko, Ju Saribekova, S. Miasnikov
• Format: Article
• Language: English
• Published: National university of food technologies 2015-05-01
• Series: Ukrainian Food Journal
• Subjects: Wool; Grease; Lanolin
• Online Access: http://nbuv.gov.ua/j-pdf/UFJ_2014_3_3_8.pdf

Introduction. Existing ways of extraction of wool grease have the high cost price and are not harmless. For increase of efficiency of extraction of wool grease in work application high-discrete processing (HDP) wool-washing water is offered. Materials and methods.Determination of conductivity, RedOx-potential, temperature, pH and the total number of lipid-water ions was carried out using a combined tester Combo HI 98129 («HANNA Instruments»). Concentration of free radicals was determined by titration method. Viscosity change of washwater under the influence of HDP was investigated by the method of measurement by an Ostwald. Influence of duration of the HDP to change the surface tension of the wash water was measured by counting drops. Resultsand discussion.As a result of HDP, there is a change of physical and chemical properties of the wash water, namely: reduction of conductivity wool-washing water (from 2969 µS/cm to 2837 µS/cm) and the total ion content (1487 mg/l to 1298 mg/l), increased pH environment (8.35 to 9.40), temperature (from 18°C to 43°C) and RedOx-capacity (from 60 mV to 93 mV). This is because HDP helps create areas of high concentration of mechanical energy, which leads to a high impact strength and high pressure. Temperature rise in turn affects the hydrogen bonds, with the collapse cluster complexes of water and hydration shells around ions with the formation of free radicals, which means, that the presence of chemical reactions in the water. Reduced viscosity (with 1,034·10-3 Ns/m 2 to 0,903·10-3 Ns/m 2) and surfacetension (from 39.86 cN/m to 37.56 cN/m) of wash water under the influence of the HDP is due to breaking of hydrogen bonds of water associates and the weakening of the forces of attraction between the molecules within the clusters and in the surface layer – structural changes of water. The most important chemical and structural changes occur in the washings at 180 with the processing time. Conclusions. Under the influence of the HDP occur chemical and structural changes that contribute to the intensificatio n of the process of extraction of wool grease.