PEMANFAATAN DEDAK DAN PATI GADUNG TERMODIFIKASI SEBAGAI MEDIA PERTUMBUHAN KAPANG (Monascus purpureus) PENGHASIL PIGMEN MERAH
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ABSTRACT: This research had obtained the formulations of yam (gadung) starch and bran that can support the growth of Monascus purpureus optimally so that optimal red pigment was obtained. Apparently, by modifying gadung starch can shorten the adaptation phase of Monascus purpureus to achieve logarithmic growth. The modification was carried out by hydrolyzing gadung starch using acid and heat in order to obtain simple sugars and soluble starch which can be immediately used by the molds to grow, reproduce, and produce secondary metabolites in the form of red angkak. Hydrolysis at pH 3 resulted in starch solubility which was not significantly different from pH 3.5; 4.0; and 4.5 but significantly different from pH 5.0. The type of acid that was very effective for hydrolyzing starch was HCl. Substrate composition that can produce the most red pigment (angkak) with the highest solubility in water was the ratio (modified gadung starch : bran) 70 : 30 for 20 days of fermentation.
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DOI: https://doi.org/10.36441/jtepakes.v4i2.1411
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