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High Static Pressure and Heat Assistant Milling for Preparing Superfine Bone Particles

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  131590979,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: @2013
Authors:   Yin Zhang, Wei Wang, Xin Hui Wang, Ge He
Keywords:   High static pressure bone particles superfine milling

Abstract. Particle size is very important for human and animal digestion when animal bone is used as food and feed ingredient. We studied the combined high static pressure (HSP), heat and traditional milling technologies to process animal bones to superfine bone powder. Methods to estimate the bone particle size, feasibility of the combined method to prepare superfine bone particle, and the optimal parameters for the new process were analyzed. Results indicated that the screens with different mesh sizes (mesh 40~400) were effective to estimate the sizes of the bone particles. Processing temperature, processing time, and ratio of bone and water were taken as key factors of affecting the fineness of bone milling, single factor experiments indicated that the pass rate for 400-mesh screen (37μm opening) was only 25.4% (w/w) of traditional milling, which was significantly lower (p<0.05) than that of the HSP and heat combined methods. This suggests that the combined method is effective to prepare finer bone particles. Fitting results showed that there was significant (p<0.05) relativity between the key factors and the 400-mesh pass rate. This was confirmed by the verification tests. Based on the fitting model, an optimal process for preparing the superfine bone particle was acquired as processing temperature 120 °C, processing time 75 min, and ratio of bone and water 0.5 (g/mL), the corresponding pass rate for 400-mesh screen was 83.1% (w/w). The new method of HSP and heat assistant milling has a potential to be used for preparing superfine bone particles.

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