Biopolymers Produced by Treating Waste Brewer’s Yeast with Active Sludge Bacteria: The Qualitative Analysis and Evaluation of the Potential for 3D Printing

Biopolymers are a suitable alternative for the ongoing problem of plastic accumulation, even though commercialization is difficult, which reflected in price product. However, costs can be reduced if active sludge bacteria and cheap, accessible substrates such as waste brewer’s yeast used. Waste rich source carbon nitrogen widespread substrate various industries. Thus, cultivation was performed on brewers’ to obtain biopolymers that used 3D printing. FT-IR, TG, DSC analyses produced polymers were conducted after extraction, well biogas biomethane potential tests. Results under conditions show biopolymer content extremely heterogeneous. during SBR, signals at 1741.3, 1709.6, 1634.3, 1238 cm−1 detected. Further needed, but when said results compared those consulted scientific articles, there an indication least small amount PHA present biomass SBR. SBR material printing cube. Moreover, testing physical properties (Young’s modulus) 3D-printed cube performed. After conducting experiments, it concluded process, although time-consuming, achieved goal stable rigid made from biopolymers. optimization process should focus more detailed microbial selection extraction. In way, isolation, purification, identification techniques will improved, could achieve higher yield and, thus, make