Suppression of malodor from garbage during storage periods by yeast producing fragrances

A strain of yeast (YT1) that is effective in suppressing malodor emission during the storage of garbage by producing fragrances and masking the malodors was isolated from garbage and identified as Candida krusei var. transitoria. The strain YT1 grew and formed pseudomycelium on the surface of the garbage and produced various fragrances, including alcohols and esters such as isoamylalcohol and ethyl ester. The quantities of the fragrances produced by strain YT1 were dependent on the various cultivation conditions, the temperature, pH, and kinds of substrates. The optimum conditions for fragrance production by strain YT1 were found to be a cultivation temperature of 40 °C, pH 4, and a glucose-rich substrate condition.