| dc.description.abstract | The challenges faced by the Indonesian state are increasing greenhouse gases,
climate change, and depleting fossil fuel reserves. This requires the exploration of alternative
energy that is environmentally friendly and sustainable. Algae biomass, especially Ulva sp. is
one of the resources that have the potential for bioethanol production as an alternative energy
producer. The purpose of this study is to determine the potential of Ulva sp. as raw material for
bioethanol and to determine the effect of particle size, solvent concentration, and power on the
hydrolysis process. This study used Ulva sp. as raw material. hydrolyzed with HCl solvent using
the microwave assisted hydrolysis method. Hydrolysis with HCl concentrations of 0.1 N, 1 N,
2 N, variations of microwave power 150 watts, 300 watts, 450 watts, and particle sizes of 60
mesh, 80 mesh, and 100 mesh. Measurement of reducing sugar levels was carried out using the
dinitro salicylic acid (DNS) method. The results showed that the best conditions for hydrolysis
were when the HCl concentration was 0.1 N, the microwave power was 450 watts, and the
particle size was 80 mesh which resulted in a reducing sugar content of 20.751 mg/mL. | en_US |
