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| Optimization for color sorting process of moldy tea seed kernel by response surface methodology |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240104 |
| KeyWord:tea seed kernel color sorting for mildew sorting net rate error-sorting rate mildew rate |
| FundProject:浙江省“尖兵”“领雁”研发攻关计划项目(2023C04010)；金华市重点科技项目(2021-2-009) |
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| Abstract: |
| In order to improve the color sorting precision of moldy tea seed kernel and ensure the quality of tea seed oil raw materials, color sorting experiments of moldy tea seed kernel were carried out. Using sorting net rate and error-sorting rate of tea seed kernel as the response, and vibration frequency, sensitivity and disease spot value as factors, the color sorting process of moldy tea seed kernel was optimized by response surface methodology. The results showed that sensitivity had the greatest impact on the sorting net rate, followed by disease spot value and vibration frequency. Disease spot value had the greatest impact on the error-sorting rate, followed by sensitivity and vibration frequency. The optimal process conditions for color sorting of moldy tea seed kernel were obtained as follows:vibration frequency 50 Hz, sensitivity 32, and disease spot value 47. Under these conditions, the sorting net rates of Pu′er tea seed kernel and Jiukeng tea seed kernel were 98.6% and 99.1% respectively, the error-sorting rates were 3.89% and 4.34% respectively, and the mildew rates were 0.67% and 0.54% respectively. Under the conditions of vibration frequency 50-60 Hz, sensitivity 30-33, and disease spot value 40-47, the sorting net rate was above 98%, and the error-sorting rate was below 5%. In conclusion, through the optimization of color sorting process of moldy tea seed kernel by response surface methodology, reasonable process parameters can be selected to increase sorting net rate and reduce the error-sorting rate and mildew rate of tea seed kernel. |
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