Optimasi Produksi Biohidrogen dari Palm Oil Mill Effluent dengan Metode Suppressing Mikroba Metanogenik pada Inokulum Kotoran Sapi

Abstract

Research in the field of bioenergy technology is currently being developed. One of bioenergy types that became the focus of development in Indonesia is biohydrogen. In producing biohydrogen from palm oil mill effluent (POME) using inoculum from cow dung, the production of biomethane gas causes biohydrogen productivity being decreased. The method used to increase the productivity of biohydrogen in this study is by suppressing methanogenic microbial treatment method which is conducted by heating cow dung inoculum at 95 °C for 120 min. Producing biohydrogen was done by fermented both POME and cow dung inoculum in vial bottle 120 mL at room temperature. Fermentation condition was adjusted at pH 5.5 by phosphoric buffer 1 M. The results obtained in this study consist with the increasing value of biohydrogen productivity, maximum of cummulative biohydrogen production rate and yield were 75.61 % and 0.43 mL H₂/hr and 104.82 mL H₂/g COD, respectively. This method was also perfectly suppressed biomethane gas production with percentage decreasing value is 100 %. The aim of this study is to investigate the effectiveness of suppressing method in optimizing biohydrogen production.