Delay Effectiveness Fermentation Process on Nira Siwalan (Borassus flabellifer L.) with Ultraviolet Irradiation Method

SAIFUL IMRON. 105100213111004. Delay Effectiveness Fermentation Process on Nira Siwalan (Borassus flabellifer L.) with Ultraviolet Irradiation Method. BACHELOR THESIS. Pembimbing: Wahyunanto Agung Nugroho, STP, M.Eng. dan Yusuf Hendrawan, STP, M. App. Life Sc., Ph. D.

 

SUMMARY

Palm tree is often called a palm tree. Besides cooked into sugar, can be drunk directly without being processed and is often called the legen. Fresh palm sap can be retained, since tapped will undergo fermentation by microorganisms that converts sucrose to alcohol and continue to be sour. Therefore to avoid contamination and inhibit the fermentation is added additives (preservatives) and carried out the heating or pasteurization. In addition, there needs to be another alternative for preservation of palm sap which aims to prevent fermentation that the light irradiation Ultraviolet (UV). The purpose of this study was to determine the effectiveness of the prevention of fermentation on fresh palm sap using ultraviolet (UV) and determine the effect of the use of ultraviolet (UV) to the fresh palm sap of the total microbial reduction, a decrease in pH and increased levels of alcohol.

This research use method completely randomized design (RAL) with variation in the diameter hose (1 cm and 0.5 cm) and flow rate (1.5 cm³ dt^-1, 1 cm³ dt^-1 and 0.5 cm³ dt^-1). The data obtained were analyzed using Analysis of Variants (ANOVA). If the test results indicate a real difference then do further study with LSD (Least Significant Difference)

The results showed the diameter of the hose and the flow rate used in the radiation effect on the microbes (lowest = 1.96 log CFU/ml), a decrease in pH value (the smallest average = 0:37) and increased levels of ethanol (smallest increase = 0:47%). After analysis by the method of "multiple attribute" variation obtained flow and hose diameter is best to be on the treatment B2Q1 ie with a hose diameter of 1 cm and a flow rate of 0.5 cm³ dt^-1.

Keyword : Nira Siwalan, Ultraviolet C, Etanol, Total Microbial