In this study, experiments were conducted to investigate the production of biogas from vegetable wastes by using anaerobic digestion process. The complete-mix, pilot-scale digester with working volume of 70 l was used. The experimental protocol was defined to examine the effect of the change in the organic loading rate on the efficiency of the production of biogas and to report on its steady-st...

introduction: antibiotics have the potential to adversely affect the microbial community. for anaerobic digestion, a sufficient methanogenic population needs to be preserved in the system. the main aim of this study was determination of inhibitory concentration of oxytetracycline on methanogenic bacteria. methods: a 120 ml jacketed bioreactor with a 90 ml working volume was inoculated granular ...

• The role of biogas bubbles in mixing is significant lower mixer rotation speeds. Considering bubble creation does not change the velocity gradient. 1-cm/s threshold for dead volume can show generation effect. A strategy capable handling a suitable agitation within digester tanks necessity order to assure continuous contact substrates and degraders inside bioreactors. As an energy demanding pr...

This study evaluated the effects of sodium on anaerobic biomass from second-stage reactor a two-stage digester. The results indicated that methanogens showed relatively high tolerance 2.4 g Na+ L−1. Microbial community analysis viable Methanomicrobiales was most abundant population by combined propidium monoazide cross-linking quantitative polymerase chain reaction technique. There shift toward...

Three pilot-scale anaerobic digesters (two of a unique fixed-film design, of which one was fed micronutrients, one not, and an identically sized plug-flow digester, which served as the control) were monitored for methane production as a comparative indication of performance. All of these pilot-scale digesters were loaded daily with high-solids dairy manure, passed through a 1.5" x 3" mesh scree...

The aim of this work was to evaluate the response a vinasse mesophilic anaerobic digester intermittent mixing. Physicochemical analysis were performed on digestate, and three samples collected at different depths, providing local insight before after mixing speed varied from 20 60 rpm. biogas production gradually increased with maximum 477 LCH4·kgCOD?1 Anaerobic digestion more destabilized high...

Different mixtures were digested in a single-stage, batch, mixed, laboratory scale mesophilic anaerobic digester at the Biomass Research Centre Laboratory (University of Perugia). The yield and the composition of biogas from the different substrates were evaluated and the cumulative curves were estimated. Two experimental campaigns were carried out, the first on three mixtures (chicken, pig and...