Fermented Beetroot (Beta vulgaris L.) Extract by Kombucha as Energy Booster Produced via Cross-Flow Microfiltration MembraneAgustine Susilowati, Aspiyanto, Hakiki Melanie, Yati Maryati and Euis FilaillaE3S Web Conf., 503 (2024) 05006DOI: https://doi.org/10.1051/e3sconf/202450305006