| Abstrakt: |
Biohydrogen has energy potential because of its minimal CO2 emissions, high hydrogen combustion point (120.1 MJ/kg), high energy density (142 kJ/g), and energy conversion efficiency. Biohydrogen can be created using organic waste such as sago dregs, offering a solution for waste management and for energy production. Only 25–30 % of sago stalks are used for making sago flour, while the remaining 70–75 %, the sago dreg, is a waste product. The majority of waste is disposed of in landfills without treatment, resulting in environmental issues. However, sago dregs consist of 44 % cellulose, 14.5 % hemicellulose, and 4.9 % lignin. It can therefore be used as a raw material for the production of biohydrogen gas. The purpose of this study is to investigate the influence that different solution concentrations (0.5 M, 1 M, 1.5 M, and 2 M) of buffer variables (NaHCO3, phosphate, acetate) have on biohydrogen gas yields during the anaerobic fermentation process. The sago dregs were pre-treated initially with a 0.4 M H2SO4 solution. This study also employed glucose at a 10 g/L concentration as a substrate for comparing outcomes. Gas chromatography research revealed that studies with a 2 M NaHCO3 buffer produced 0.665 % H2 with sago dregs as the raw material, whereas a 0.5 M NaHCO3 buffer produced 1.549 % H2 with glucose as the raw material. Sago dregs can be combined with inoculum to produce biohydrogen through batch anaerobic digestion at mesophilic (30 °C) and atmospheric pressure (1 atm) with a pH of 4.8–5.5. [ABSTRACT FROM AUTHOR] |
