Food and Fermentation Industries >

2022 , Vol. 48 >Issue 6: 117 - 124

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.029234

Quality characteristics analysis and process optimization of hot air drying of Lentinus edodes

  • SUN Tongsheng ,
  • WANG Jinzhi ,
  • WU Huidong ,
  • LING Feng
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  • (School of Mechanical Engineering, Anhui Polytechnic University, Wuhu 241000, China)

Received date: 2021-08-31

  Revised date: 2021-11-22

  Online published: 2022-04-25

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Abstract

To improve the quality of Lentinus edodes after hot air drying, fresh Lentinus edodes were used as raw materials for the treatment of variable temperature drying and intermittent drying. Experimental tests were carried out in five aspects: temperature, color, moisture content, energy consumption and rehydration ability, and compared with the constant temperature drying. The results showed that the temperature distribution of Lentinus edodes dried by variable temperature drying was more uniform. Not only the temperature difference of a single Lentinus edodes was small, but also the temperature rise of different Lentinus edodes was the same. The temperature field uniformity of intermittent drying was the second. After variable temperature drying and intermittent drying, the color parameters of Lentinus edodes changed little. The brightness value, red-green value and yellow-blue value decreased only slightly, and the maximum color difference values were 7.42 and 7.87 respectively. However, the maximum color difference value of Lentinus edodes after constant temperature drying was as high as 22.38. After constant temperature drying, the water content of Lentinus edodes decreased rapidly, and the rehydration rate was the lowest, at 92.59%. The rehydration rate of variable temperature drying was the highest, up to 143.65%. The energy consumption per unit time of intermittent drying was 0.056 kW·h, which was lower than 0.105 kW·h of constant temperature drying and 0.083 kW·h of variable temperature drying. Therefore, variable temperature drying has a significant effect on improving the quality of Lentinus edodes, while intermittent drying has an obvious energy-saving effect. The results can provide a reference for the optimization of the hot air-drying process under different drying requirements.

Key words： hot air drying; variable temperature drying; intermittent drying; temperature distribution; colour and lustre; moisture content; energy consumption; rehydration capacity

Cite this article

SUN Tongsheng , WANG Jinzhi , WU Huidong , LING Feng . Quality characteristics analysis and process optimization of hot air drying of Lentinus edodes[J]. Food and Fermentation Industries, 2022 , 48(6) : 117 -124 . DOI: 10.13995/j.cnki.11-1802/ts.029234

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