Perlakuan Pascapanen Buah Kesemek Reundeu (Diosphyros kaki L.) Menggunakan Gas Karbon Dioksida

Reski Febyanti Rauf, Yohannes Aris Purwanto, Sobir ,


Postharvest treatment for removing astringency on Reundeu persimmon by traditional way, make the appearance is not attractive visually for commercial purpose. One of the alternative treatment that potentially to be applied is the high concentration of CO2 gas from dry ice. Application of deastringency treatment aimed to analyze the effectiveness of CO2 gas for reducing tannin content on Reundeu persimmon. Fruits were put into closed jar with dry ice at dose 10, 20, and 30 g and control at ambient temperature. Treatments set for 24, 48, and 72 hours. Measurement of initial concentration of CO2 gas in the jar was carried out after dry ice sublimed. Final concentration of CO2 was measured at the end of treatment and accompanied with analyze of tannin content. The result showed that high concentration of CO2 gas (>80%) can reduce tannin on Reundeu persimmon effectively. Based on minimum human perception, the treatment of CO2 gas as deastringency can be applied at three maturity levels, i.e. 10 g doses at 24 hours for green stage (0.097%), 10 g doses at 48 hours for greenmature stage (0.054%) and 10 g doses at 72 hours for orange-ripe stage (0.02%). This result can be use as a reference for distribution handling of persimmon fruit to fulfill the consumers and markets demands.

Keywords: carbon dioxide gas, deastringency treatment, dry ice, persimmon, tannin

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