Abstract
This work evaluated the redesign of an Upflow Anaerobic Sludge Blanket (UASB) bioreactor to increase biogas production from anaerobic digestion of vinasse and compared the redesign UASB bioreactor with a conventional UASB design. Vinasse contains a high level of organic matter, 120.2±18.4gO2/L of chemical organic demand (COD), and a 0.8 biodegradability index (BI). Thus, vinasse is a potential nutrient source for biogas production by anaerobic digestion. The modified UASB bioreactor has an innovation that consisted in a second leach bed sludge, which improved the methane proportion in biogas producing 2140mLCH4/day as compared to the traditional bioreactor (1840mLCH4/day).
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