The Effect of ELF Electromagnetic Radiation on Microorganism Development in The Sticky Rice Tape Production Process

Abstract

The research purpose is to assess the effect of electromagnetic radiation or ELF on the growth and activity of microorganisms involved in the fermentation of glutinous rice for making tape ketan. The research method used involves applying ELF radiation treatment to 10 samples of tape ketan fermented by yeast microorganisms, then comparing them with 10 other samples of tape ketan that were not exposed to ELF radiation. The measurement of microbial growth is carried out using parameters such as pH, alcohol content, sensory evaluation through taste, and observing changes in appearance, odor, and flavor, as well as comparing their density. The results of the study show changes in the fermentation rate, the number of microorganisms, and the quality of the tape ketan affected by ELF radiation. Some types of microorganisms exhibit slower growth compared to tape that was not irradiated with ELF radiation.