INFLUENCE OF THE FERMENTATION OF PINEAPPLE WASTES WITH THE USE OF METHANOBACTERIUM STRAINS SEPARATED IN VIETNAM ON THE PRODUCTION OF BIOGAS FROM THEM

When pineapples are processed, the wastes obtained comprise 30–50% of the raw-material weight. These wastes contain sugar, albumins, lipids, and vitamins that decompose under the action of microorganisms existing in nature and, in so doing, pollute the environment. The use of wastes in plants operating on biogas makes it possible to obtain great economic benefi ts. It was established that the best conditions for the obtaining biogas from pineapple wastes are realized in the case where Methanobacterium strains are used for increasing the rate of fermentation of these wastes and the wastes have a temperature of 35–45^o C, a pH index of 7–7.5 at the initial stage of their fermentation, and a C/N ratio of 30/1. Under these conditions, the MT3, MT5, and MT7 strains of Methanobacterium yield the maximum amounts of biogases containing, respectively, 57.4% of CH4 and 36.1% of CO₂, 57.2% of CH₄ and 36.3% of CO₂, and 57.4% of CH₄ and 36.2% of CO₂
   
Author:  Nguyen Thuy Nga and Nguyen The Trang
Keywords:  biogas, pineapple waste, Bacillus, Streptomyces, Methanobacterium
Page:  392