Sri Handajani, Lucia Tri Pangesthi
Universitas Negeri Surabaya, Faculty of Engineering, Department of Home Economic Gedung A3 Lantai 2 Kampus Unesa Ketintang, Jl. Ketintang Surabaya, 60231, Indonesia
srihandajani@unesa.ac.id, luciatripangesthi@unesa.ac.id
ABSTRACT
Utilization of ganyong in the form of starch is done as an effort to accelerate the realization of food stabilization program. Ganyong starch used as raw material or addition in making various food. This preliminary study aims to determine the appropriate method of bulps destruction to produce a high yield of starch, the amount of natrium bisulfite used to produce the best degree of white starch and starch quality based on its chemical properties. Preliminary experimental research was conducted with 2 stages, namely starch extraction stage and bleaching stage ganyong starch and starch quality test based on chemical properties (carbohydrate, protein, fat, crude fiber, amylose, ash water). The results of this study showed that the yield of ganyong starch by grated higher than milled, the use of natrium bisulfite with 1% concentration gave good result and the chemical test result of optimal ganyong starch was protein 0,04%, fat 0,53%, ash 1.43%, water 6.83%, starch 75.53%, amylose 35.20%, crude fiber 1.03%. It is expected that the method of manufacture can increase the production and quality of ganyong starch so that it can be utilized further to make various kinds of processed starch based ganyong.
KEYWORDS: Bulbs, Sodium Bisulfite, Ganyong Starch