Faculty of Engineering, Department of Food Engineering, Hacettepe University, Beytepe , 06800, Ankara, Turkey.
Faculty of Engineering, Department of Chemical Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey.
Curr Microbiol. 2022 Feb 9;79(3):93. doi: 10.1007/s00284-022-02776-x.
Agro-industrial wastes are rich sources of some nutrients. Thus, utilization of wastes seems to be ecologically sound and economically advantageous. The aim of this work was to investigate the potential usage of various agro-industrial wastes as fermentation medium for pullulan production by a domestic strain; Aureobasidium pullulans AZ-6. In this study, different agro-industrial wastes; various citrus peels, grape pomace, the hydrolysates of hazelnut and chestnut shells, sugarcane molasses residue, dried and fresh hazelnut husks and pumpkin peel, were used as fermentation media without adding any extra nutritional component for pullulan production by A. pullulans AZ-6. As a result, among the tested media, the maximum pullulan concentration was obtained as 33.59 gL using the sugarcane molasses residue, and followed by the corresponding value of 30.02 gL obtained in the dried hazelnut husk hydrolysate medium. Therefore, the usage of agro-industrial wastes as fermentation media is considered to make pullulan production cost effective. In addition, waste treatment from this aspect solves a relevant environmental problem. In this study, sugarcane molasses residue and dried hazelnut husk hydrolysate were used directly as fermentation media for pullulan production for the first time. Pullulan production from sugarcane molasses residue and dried hazelnut husk hydrolysate media might be a promising substrate for economical point of view.
农业工业废物是一些营养物质的丰富来源。因此，废物的利用似乎在生态上是合理的，在经济上也有优势。本工作的目的是研究利用各种农业工业废物作为发酵培养基生产出国产菌株；出芽短梗霉 AZ-6 的茁霉多糖。在这项研究中，不同的农业工业废物；各种柑橘皮、葡萄渣、榛子和板栗壳的水解产物、甘蔗废糖蜜、干榛子壳和南瓜皮，被用作发酵培养基，而不添加任何额外的营养成分来生产 A. pullulans AZ-6 的茁霉多糖。结果表明，在所测试的培养基中，用甘蔗废糖蜜作为发酵培养基，茁霉多糖的最大浓度达到 33.59 g/L，其次是在干榛子壳水解物培养基中得到的相应值 30.02 g/L。因此，农业工业废物的使用被认为可以使茁霉多糖的生产具有成本效益。此外，从这个角度处理废物解决了一个相关的环境问题。在这项研究中，甘蔗废糖蜜和干榛子壳水解物首次被直接用作发酵培养基来生产茁霉多糖。从甘蔗废糖蜜和干榛子壳水解物培养基中生产茁霉多糖可能是从经济角度来看很有前途的底物。
