Abstract
Tea plants in Indonesia are derived from Carmelia sinensis var. assamica which contain catechin in quite high amount compared with other countries tea plant. Green tea is made by inactivating the oxidase / phenolase enzyme that presents in the fresh tea leaf buds from tea garden, by using hot steam to prevent the oxidation of the catechins. Drying process to reduce the moisture of tea, one of the method is by utilizing the dry air from dehumidification process. Liquid desiccant made from 50% concentration of CaCl2, the temperature is lowered to 10 °C and sprayed into the air stream which contains water vapor by using a 0.2 mm spraying nozzle so that mass transfer and latent heat occur in the dehumidifier. The result of air dehumidification process used for drying tea leaves. The air is able to dry the tea leaves from the weight of 58 grams to 47 grams. Then the liquid desiccant dehumidification process will be streamed into the humidifier, where the liquid desiccant regeneration process will have change into the initial concentration. The result of air humidification process has an average absolute humidity rise of 0.07 g/kg. The liquid desiccant regeneration process that happened continuously reaching the saturation point at 280 minutes. It can be concluded that the process of dehumidification-humidification is a fairly effective method for drying the tea leaves.
Highlights
Indonesia is a country that has a great wealth of biodiversity, there are approximately 30,000 species of plants that grow in Indonesia [1], which includes the tea plant
Hot steam which used for tea leaves should have a temperature between 80 °C - 100 °C [2]
When compared to the results of research conducted by Jun Liu, et al in Figure 2 which has the ability to decrease the average absolute humidity of 3.3 g/kg, the dehumidification tool used in this research still have not achieved the capability yet because it has the ability to decrease the average absolute humidity of 0.78 g/kg
Summary
Indonesia is a country that has a great wealth of biodiversity, there are approximately 30,000 species of plants that grow in Indonesia [1], which includes the tea plant. Hot steam which used for tea leaves should have a temperature between 80 °C - 100 °C [2]. Moist air can inhibit the drying process of the tea leaves and will trigger the growth of bacteria that can be harmful to human life. If the air is too dry, it will cause some problems, such as case hardening and a condition which the outside of the tea leaves is dry but the inside is still moist. This will cause the growth of mushrooms on the tea leaves [3]
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