Pemanfaatan ampas tahu sebagai bahan baku pembuatan kecap manis dengan penambahan tepung tapioka

Abstract

Soy sauce is a fermented soybean product that is consumed as a seasoning or a condiment. Traditional soy sauces made of soybeans and grain with cultures such as Aspergillus oryzae and other related microorganisms and yeasts. The resulting substance is called "koji". The koji was then fermented in brine at high concentration of salt called “moromi” which was believed to contribute additional flavors. The objectives of this research was to utilize solid waste-tofu as a raw material in producing sweet soy sauce with the addition of tapioca flour. The purpose of this study was to determine the selected formulation of three factors, there are variance of time of steaming (15 and 30 minute), the addition of tapioca flour (5% and 10%) and time of salt fermentation (1 and 2 months,) to produce sweet soy sauce which has the highest protein content and the highest score of consumer preference. The results were compared with SNI 01-3543-1999 and three commercial sweet soy sauce. Based on physical, chemical and sensory properties, the selected formula that produced the highest protein (1.99 %) and the highest score of consumer preference (3.7) was 15 minutes of steaming, addition of 10% tapioca flour and 1 month salt fermentation period. Soy sauce best formulation had total soluble solid 71.33 obrix, the viscosity 1716.67 cp, total sugar 60.31 %, sodium chloride content 6.84% and water content 22.43 %. Microbiological analysis showed that sweet sauce best formulation contained 1.8 x 104 colony/g of total plate count, <3 MPN/g of coliform, <3 MPN/g of E.coli, and 2.5 x 102 colony/g of total mold content. Soy sauce best formula met the quality of SNI requirements except for protein and total mold content. Soy sauce selected formula had similar characteristics with commercial sweet soy sauce.