Thanimkarn Setthawat, Cheevitsopon Ekkapong, Jongyingcharoen Jiraporn Sripinyowanich
Department of Agricultural Engineering, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand.
Department of Food Engineering, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand.
Heliyon. 2019 Jul 1;5(6):e01999. doi: 10.1016/j.heliyon.2019.e01999. eCollection 2019 Jun.
Infrared (IR), vibratory bed assisted infrared (VIR), vacuum infrared (VC-IR), and vibratory bed assisted vacuum infrared (VC-VIR) drying of Linn. (CQ) were conducted. The objective was to investigate the effects of vibration, vacuum, and material thickness on IR drying of CQ. VC-VIR drying of 5-mm CQ provided the highest maximum drying rate () of 0.258 g water/g dry matter·min. Although the vacuum operation contributed to improved effective moisture diffusivity ( ), it consumed high energy and degraded active compounds of CQ. VIR drying could be a more promising technique. VIR drying of 15-mm CQ produced the greatest total phenolic content (TPC) and quercetin content of 1083.62 mg GAE/100 g dry matter and 3.472 mg/100 g dry matter, respectively. The lowest total color difference (Δ) of 13.69 was also obtained. It required low specific energy consumption (SEC) of 17.62 kWh/kg and provided maximum of 0.112 g water/g dry matter·min.
对[植物名称未给出，推测是某种植物，暂用“CQ”表示]进行了红外（IR）、振动床辅助红外（VIR）、真空红外（VC - IR）以及振动床辅助真空红外（VC - VIR）干燥处理。目的是研究振动、真空以及物料厚度对CQ红外干燥的影响。5毫米厚的CQ采用VC - VIR干燥时，最高最大干燥速率（）为0.258克水/克干物质·分钟。尽管真空操作有助于提高有效水分扩散率（），但它能耗高且会使CQ的活性成分降解。VIR干燥可能是一种更有前景的技术。15毫米厚的CQ采用VIR干燥时，总酚含量（TPC）最高，为1083.62毫克没食子酸当量/100克干物质，槲皮素含量为3.472毫克/100克干物质，同时还获得了最低的总色差（Δ），为13.69。它所需的比能耗（SEC）低，为17.62千瓦时/千克，最大干燥速率为0.112克水/克干物质·分钟。
