Process optimization of microwave sterilization for Aspergillus niger from rice
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摘要: 为了探讨微波处理对大米霉菌的杀灭效果,以黑曲霉为研究对象,应用响应面法对大米中黑曲霉的微波杀菌工艺进行优化研究,考查微波功率、微波时间和菌悬液体积对大米黑曲霉孢子减少对数周期的影响,并建立相应的模型。结果表明最佳工艺条件为:微波功率231W、微波时间4min、菌悬液体积97m L,在此条件下黑曲霉孢子减少对数周期为4.8920±0.0882,实际值与理论值的相对误差为4.37%。与水浴加热法相比,微波法的杀菌效果是其杀菌效果的8.5倍。Abstract: In order to explore the killing effects of microwave treatment on molds from rice, response surface methodology was used to optimize process of microwave sterilization Aspergillus niger from rice. Effect of microwave power, microwave time, and mould suspension volume on log-periodic reduction of spores of Aspergillus niger from rice were investigated, and corresponding regression equation was established. Results showed that optimum sterilization conditions were as follows:microwave power of 231 W, microwave time of4 min, and mould suspension volume of 97 m L. Under these conditions, log-periodic reduction of spores of Aspergillus niger was 4.8920±0.0882, relative error between determined and predicted value of log-periodic reduction of spores was 4.37%. Compared with water-bath heating treatment, effect of microwave sterilization was 8.5 times as much.
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Keywords:
- rice /
- Aspergillus niger /
- microwave /
- sterilization /
- response surface methodology
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