摘要
为解决传统茉莉花茶加工过程劳动强度大,配花量大,能耗大等问题,该文创新花茶加工方式,研发了能精确调控茉莉花释香环境参数及椰壳活性炭吸附花香的茉莉花释香吸香装置,进行不同温湿度对茉莉花释香性状指标及活性炭吸附的香气品质影响试验研究。结果表明,处理T2(温度30℃,相对湿度85%)、T3(30℃,95%)、T5(35℃,85%)的茉莉花失水率、开放度、感官品质及活性炭吸附率等指标优于其他处理;处理T5(35℃,85%)、T4(35℃,75%)、T6(35℃,95%)的茉莉花香气品质得分较高;在茉莉花最佳释香温湿度T5条件下,活性炭吸附率为13.96%。该释香吸香装置延长茉莉花生机,比传统方法提高利润28%,研究结果为茉莉花茶"茶-精油"创新工艺提供参考。
Jasmine scented tea is a kind of flavored tea. It is popular for its elegant aroma and mellow taste. Jasmine flower is a typical “temperament flowers”, it blooms at night when it releases fragrant aroma. In traditional jasmine tea processing, the tea and the jasmine flower are mixed together during which the materials are spread for heat dissipation, when the temperature increasing and the tea is re-dried. The process is repeated for several times. However, many problems exist with this type of production, including its complicated process, longer production period, higher labor intensity, higher flower consumption, seasonal and field limitations. To solve these problems, technological processes have been developed that employ a device to absorb the aroma of jasmine flowers, perform a clean extraction of essential oil, and produce jasmine tea with the oil.
A jasmine aroma releasing and collecting device was developed using coconut shell activated carbon. The device consisted of an environmental control system, an aroma releasing warehouse and an aroma collection system. The environment control system consisted of a temperature sensor, a humidity sensor, a humidifier, an air inlet and refrigeration components, which could provide suitable environment for jasmine flower releasing fragrant aroma. The aroma releasing warehouse was composed of four shelves, which could provide space for jasmine flower laying and airflow distribution uniform. The aroma collection system was consisted of an adsorption column, a vacuum pump, an air outlet and activated carbon. The device could control the environmental parameters precisely, extending the releasing time from 10 hours to 18 hours. It collected the jasmine flower aroma through negative pressure using activated carbon, which decreased the loss of aroma and simplified the essential oil collection process.
The optimum temperature and humidity for aroma releasing and collecting were getted. The test showed that the optimum conditions were temperature 30℃ and relative
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2014年第21期316-323,共8页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家科技部支撑计划项目(2014BAD06B06)
关键词
吸附
品质控制
加工
茉莉花
释香
吸香
装置
香气品质
adsorption
quality control
processing
jasmine flower
aroma releasing
aroma collection
device
aroma quality
