Biodegradable constituents of municipal solid wastes such as fruit and vegetable wastes are produced\u00a0in large quantities in markets, and become a source of nuisance in municipal landfills or composting,\u00a0a because of their biodegradability. In order to resolve the problem and reduce the biodegradability of\u00a0organic fraction municipal solid wastes, mechanical and biological treatment are applied. The aim of\u00a0this research is to evaluate the biodegradation, process of biowaste in liquid fraction made Caringin\u00a0market in anaerobic batch reactor. Furthermore, the production of biogas from the reactor is also\u00a0being monitored. Biowaste used in this research were taken from Caringin Market, Bandung.\u00a0Mechanical treatment used include sor’cing, grinding and separating, while biological treatment used\u00a0in this research was by anaerobic digestion using a batch reactor operated ct a volume of 4 L. By\u00a0mechanical treatment, the liquid fraction of the biowaste was obtained. This researcb used a substrate\u00a0liquid fraction of the original biowaste, artificial, vegetables, fruits and variations of pretreatment\u00a0sedimentation and without pretreatment. Physical-chemical parameters analyzed in this research are\u00a0pH,VSS, volatile fatty acid (FVA), chemical oxygen demand (COD), ethanol, and biogas. The results\u00a0show that the efficiency of COD removal at higer s pretreatment edimantation than without\u00a0pretretment. COD removal efficiency in substrat with pretreatment sedimentation 81.82% the\u00a0biowaste original reactor, 72.73% the biowaste artificial reactor, 81.97% the vegetable reactor and\u00a059.90% the fruit reactor. Methan produced 2.11% day-to-10 in the biowaste original reactor without\u00a0pretreatment, and with pretreatment 0,16% the vegetable reactor and 0,019% the fruit reactor, which\u00a0both occurred on the fourth day.<\/p>\n