Anaerobic digestion of solid and liquid organic waste with microorganism from manure

Abstract

Biogas is a valuable byproduct of anaerobic digestion of organic compounds. Biogas production depends on various factors including pH, temperature, microbes, substrate, and C/N ratio. From anaerobic digestion product, we can obtain not only fertilizer (Inhibition of anaerobic digestion process: A review, Volume 99, Issue 10, 2008) but also Biogas that could be used for cooking, lighting, and electricity. This research aims to obtain biogas from solid waste (household waste) and liquid waste (sago processing waste) added microbe from cow rumen and municipal sediment. These research steps are (1) biogas production; (2) methane gas analysis. The Result of this research indicates that methane gas is able to be generated from several variations (s) of waste: bacteria mixture. The result showed that high biogas production from household wastes was obtaining at 7% (b/v) concentration of waste, 0.5% (b/v) urea, and ratio microbial of municipal sediment and rumen was 2:3 at 5% (b/v), the incubation period was 35 days. The Total volume of biogas was resulted by 687 mL biogas/gram waste that consist(s) of 165.56 mL gas of CO2 and 521.44 mL gas of CH4 (75.89% (v/v)). Maximum biogas production is recorded from water sago processing waste treatment (1 L) added with bacteria from cow rumen 18x1010 bacteria. Fermentation duration is 84 days. Total of biogas generated is 17,481 L consisting of 105.37 mL CO2 (0.60% v/v) and consisting of biogas without CO2 17,375.63 L (99% (v/v)).