INFLUENCE OF N2 FLUSHING AND Fe2+, Zn2+ ADDITION FOR ETHANOL AND ACIDOGENIC PRODUCT FORMATION FROM THE CONVERSION OF HIGH ORGANIC CONCENTRATION WASTEWATER BY ANAEROBIC PROCESSES

• Main Author: GUMILAR (NIM: 25313309), ANDRI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/25553
• Institution: Institut Teknologi Bandung

<p align ="justify">The world's energy demand are increasing by the human population. Crisis of the energy prompted us to found alternative energy sources derived from easily obtainable materials and environmentally friendly. Ethanol is an alternative fuel that can be used as a substitute for fossil fuels. The previous research has given results that ethanol can be produced from the wastewater with high concentration of organic by anaerobic processes. In this study, wastewater used are the synthetic waste by the variation of N2 flushing about 12; 24; 36 and 48 hours then flushing has continued by internal biogas. The concentration of soluble and total COD was obtained in a row was 6515 mg/L and 2816 mg/L. The maximum concentration of ethanol production in the reactor by flushing N2 12 hours, 24 hours, 36 hours and 48 hours respectively is 58.59; 78.83; 54.72 and 54.12 mgCOD/L with the rate of formation of 0.35 to 3.92 mgCOD/L/ hour. To acetate, the maximum concentration generated in each successive reactor 732.63; 726.52; 712.36 and 950.39 mgCOD/L with the formation rate of acetate ranged from 0.57 to 61.29 mgCOD/L/hour. maximum partial pressure of H2 gas produced from each of these reactors produce different results, namely a row 1.29; 8.65; 3.35 and 1.88 kPa. The results showed that flushing the reactor with N2 for 24 hours gives the greatest efficiency of ethanol formation is 78.83 mgCOD/L with the rate of formation of a maximum of 3.92 mgCOD/L/hour and a maximum yield of 0.028.<p align ="justify">