野刺梨果渣超微粉加工技术研究

摘要

[目的]研究野刺梨果渣的加工技术,为野刺梨果渣的开发利用提供参考.[方法]以野刺梨果渣为主料、抗结剂为辅料,制备野刺梨果渣超微粉;在单因素试验基础上确定粉碎温度、粉碎时间、抗结剂种类及抗结剂添加量为影响因素,以休止角、滑角、结块量、出粉率为评价粉体品质的指标,探究野刺梨果渣超微粉的加工工艺.[结果]优化确定的野刺梨果渣粉碎加工的条件为:20℃下超微粉碎20 min,选定微晶纤维素为抗结剂,其添加量为30g/kg,在此条件下获得的超微粉流动性好、结块少且出粉率高.成品超微粉不仅物理性状优越,营养素的保留和释放量也明显提高,测得其黄酮及多酚溶出量分别为0.74和1.90 mg/g,比普通粗粉分别提高24.5％和135.0％.[结论]野刺梨果渣超微粉加工工艺为野刺梨生产废物的利用提供了技术支持.%[Objective] The processing technology for ultrafine power was studied to provide a reference for the development and utilization of wild roxburgh slag.[Method] Using wild roxburgh slag as raw material and anti-agglomeration regent as auxiliary materials,ultrafine powder was made.On the basis of single factor test,influencing factors including grinding temperature,grinding time as well as type and dosage of anti-agglomeration reagent were determined using index of angle of repose,slip angle,amount of agglomeration and flour extraction rate as indexes.[Result] The obtained optimal conditions to produce wild roxburgh slag ultrafine powder were:ultrafine grinding at-20 ℃ for 20 minutes,and microcrystalline cellulose as anti-agglomerate reagent at the amount 30 g/kg.Under the optimal conditions,the obtained wild roxburgh slag ultrafine powder had good mobility,less agglomeration,and high yield.The retention and release of nutrients were also increased.The dissolubility values of flavonoids and polyphenols were 0.74 and 1.90 mg/g,which were 24.5 ％ and 135.0 ％ higher than common powder,respectively.[Conclusion] Processing technology of wild roxburgh slag ultrafine powder would provide technical support for reusing waste of wild roxburgh.