文献类型：期刊文献

英文题名：Experimental study of freeze-thaw cycles placement in heat pump drying of tilapia fillets

作者：Li, Min[1]; Guan, Zhiqiang[1]; Xie, Daijun[2]

机构：[1] College of Mechanical and Power Engineering, Guangdong Ocean University, Zhanjiang, China; [2] School of Geography, Earth, Environmental Science, Birmingham University, Birmingham, United Kingdom

年份：2016

卷号：55

起止页码：241

外文期刊名：Chemical Engineering Transactions

收录：EI(收录号：20171603580074)、Scopus(收录号：2-s2.0-85012302359)

语种：英文

外文关键词：Low temperature drying - Temperature - Heat pump systems - Thawing - Pumps

外文摘要：Freeze-thaw placement in the drying process can reduce the average drying temperature of the sample. In order to speed up the drying process and maintain a good drying quality of dry tilapia fillets which were achieved in the condition of freeze-thaw cycles placement in a heat pump drying process, a series of drying tests were studied by using the drying time points as the variables in drying process. Freeze-thaw parameters of 4-7 (twice placement) drying time point were optimized by L9(34) orthogonal experiment at 7th hours of drying. The results showed when freeze-thaw were placed into the process of heat pump drying process which could improve the quality of dried tilapia fillets effectively. The best quality indicators under optimal condition were as follows: The value of Ca2+-ATPase activity, rehydration rate, whiteness and hardness was 2.75 μmol Pi/mg prot/h, 34.32 %, 38.87 and 10.0 N, respectively. The comprehensive score of optimizing process was 99.27. which has been improved 17% compared to the control sample. This result can provide a new low temperature drying technology and a reference for similar aquatic products. Copyright ? 2016, AIDIC Servizi S.r.l.