Resumen
Bacterial cellulose (BC), produced by Acetobacter xylinum sp. has been given a huge attention due to its high potential for many industrial applications. An optimized substrate is important for higher BC production. Thus, an alternative natural product, as carbon source, should be determined. This study aims at investigating the BC of A. xylinum cultured in sago starch processing effluent (SSPE) media by using different pH values. The BC was produced on shaking culture fermentation system. From the results obtained that the increasing in pH value lead to the high production of BC. Sago starch processing effluent (SSPE) capable to replace synthetic medium as an alternative carbon source medium through fermentation. The production of yield from different pH was conducted as BCY50S50pH6 produce the highest yield which is 0.586g/L followed by BC-Y50S50pH6 (0.429 g/L) , BC-Y50S50pH4 (0.329 g/L) and Y50S50pH(0.048 g/L). Based on FESEM, bacterial cellulose from pH6 give the good morphology as they has high porous, surface less dense and higher porosity structure. For TGA test, the bacterial cellulose from pH6 also give the highest thermal resistance. This is due to the high crystallinity in the cellulose.