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The production of five types of short chain fatty acids, including acetic, propionic, butyric, iso-butyric and valeric acids in FBH (HA0, HA5, HA10, & HA30), and FBE (EA0, EA5, EA10, & EA30) fermented with six-time variables (0 h, 2 h, 4 h, 8 h, 16 h, & 24 h).
