浙江农业学报 ›› 2019, Vol. 31 ›› Issue (3): 474-479.DOI: 10.3969/j.issn.1004-1524.2019.03.18

• 食品科学 • 上一篇    下一篇

混菌发酵联合分段控温工艺提高柑橘皮渣可溶性膳食纤维含量

曹艳1, 范铭2, 童创1, 陆胜民1,*, 杨颖1, 邢建荣1, 郑美瑜1, 唐伟敏1, 刘哲1   

  1. 1.浙江省农业科学院 食品科学研究所,农业农村部果品采后处理重点实验室,浙江省果蔬保鲜与加工技术研究重点实验室,浙江 杭州 310021;
    2.浙江师范大学 化学与生命科学学院,浙江 金华 321004
  • 收稿日期:2018-02-08 出版日期:2019-03-25 发布日期:2019-04-08
  • 通讯作者: *陆胜民,E-mail: lushengmin@hotmail.com
  • 作者简介:曹艳(1985—),女,山西吕梁人,博士,助理研究员,主要从事果品加工(微生物发酵方向)相关研究。E-mail: caoyan_115@163.com
  • 基金资助:
    公益性行业(农业)专项(201303076-05)

Improving soluble dietary fiber content of citrus peel and pomace by fermentation with mixed strains combined with two-stage temperature control

CAO Yan1, FAN Ming2, TONG Chuang1, LU Shengmin1,*, YANG Ying1, XING Jianrong1, ZHENG Meiyu1, TANG Weimin1, LIU Zhe1   

  1. 1. Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
    2. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
  • Received:2018-02-08 Online:2019-03-25 Published:2019-04-08

摘要: 为提高柑橘皮渣的利用率,以脐橙皮渣为原料,通过混菌发酵联合分段控温工艺生产高品质膳食纤维,即在脐橙皮渣固体发酵培养基中先接种植物乳杆菌,28 ℃发酵2 d后接种青霉菌,28 ℃继续发酵5 d后,加入1.5倍体积无菌水,45 ℃、100 r·min-1放置24 h。发酵产物中可溶性膳食纤维(SDF)和总膳食纤维(TDF)分别达到42.0%和90.8%以上,SDF/TDF达到46.2%,比未发酵柑橘皮渣分别提高3.08倍、50.1%和1.72倍,SDF含量及SDF/TDF比单独青霉菌恒温(28 ℃)发酵产物中对应指标分别提高33.8%和30.1%。说明混菌发酵联合分段控温工艺可显著提高脐橙皮渣中SDF含量。该工艺对蜜柑和胡柚皮渣发酵生产高品质膳食纤维具有良好的适用性。

关键词: 柑橘皮渣, 膳食纤维, 混菌发酵, 分段控温

Abstract: The peel and pomace of Gannan navel orange were fermented to produce dietary fiber by mixed strains combined with two-stage temperature control in order to promote the utilization efficiency of citrus peel and pomace. The fermentation mode of inoculating mixed strains in sequence combined with two-stage temperature control was adopted. Specifically, Lactobacillus plantarum was inoculated firstly in the solid medium based on navel orange peel and pomace, and was cultured at 28 ℃ for 2 days. Then, Penicillium sp. CIs14 was inoculated in the medium containing L. plantarum, and was cultured at 28 ℃ for 5 days. The culture medium after fermentation was mixed with 1.5 times volume of sterile water and was placed in the shaker with 100 r·min-1 speed at 45 ℃ for 24 h. The contents of soluble dietary fiber (SDF) and total dietary fiber (TDF) in the citrus peel and pomace after fermentation were more than 42.0% and 90.8% respectively, and SDF/TDF reached 46.2%. The contents of SDF, TDF and SDF/TDF were increased by 3.08 folds, 50.1% and 1.72 folds, respectively, compared with those in the original navel orange peel and pomace. The content of SDF and SDF/TDF were increased by 33.8% and 30.1%, respectively, compared with those in the navel orange peel and pomace fermented by Penicillium sp. CIs14 only at constant temperature (28 ℃). Therefore, the fermentation mode of inoculating mixed strains in sequence combined with two-stage temperature control could improve the content of SDF in navel orange peel and pomace effectively. In addition, this fermentation mode had good universality for other kinds of citrus peel and pomace to produce dietary fiber with high quality.

Key words: citrus peel and pomace, dietary fiber, mixed strains fermentation, two-stage temperature control

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