Abstract
Abstract
Cassava starch wastewater contains organic biodegradable (BOD, COD) with high concentrations so that it can be used as raw material for biogas through an anaerobic decomposition process. The purpose of this study was to evaluate the behavior of the continuous flow AnF2B reactor, related to the production of biogas in a variety of organic loads, from cassava starch wastewater. The AnF2B reactor has three parts of space with a total volume of 50 L, where each space contains biofilter (wasp nest-shaped) which is useful for the growth of bacterial consortium. The experiments were carried out by flowing wastewater into the AnF2B reactor continuously with organic loading of 2 g, 3 g, 4 g, and 5 g. The decomposition time was 1-10 days. The temperature in the reactor was maintained at 37 - 39 C and pH: 6.5 - 8. The results showed that biogas production was influenced by the organic load of wastewater, where the maximum biogas production of 6.926 L was obtained at an organic load of 5 g of COD and a biodegradation time of 3 days. The biogas produced contains CH4 (85%), CO2 (14.5%), and CO (0.5%).