Biogas generation by two-phase anaerobic digestion of organic fraction of municipal solid waste

Abstract

The organic fraction of municipal solid waste can be a significant energy source for renewable energy generation. The total production of municipal solid waste in Turkey was 25 Â 10 6 tones per year. Anaerobic digestion (AD) process may be a solution to the problems of energy demand and waste management since it provides biomethanation along with waste stabilization. AD can be operated in single or two phase configurations. Two-phase processes have some advantages over one phase systems in terms of selection of microorganisms, process efficiency, and reactor size. In this study, biochemical methane production experiments were performed in order to investigate whether phase separation enhanced the efficiency of methanogenic activity or not. The performances were compared in terms of total chemical oxygen demand (tCOD) and volatile solids (VS) reductions, and cumulative gas production. The experimental results indicated that 10% and 23% increases in tCOD and VS removals were achieved, respectively, by phase separation. The acetic and propionic acids were not detected in the reactors, which was an indication of successful methanization. V C 2012 American Institute of Physics. [http://dx.

Used disposable nappies and expired food products valorisation through one- & two-stage anaerobic co-digestion

“…(Paramaguru et al, 2017). Besides energy generation, AD presents other benefits as well, like greenhouse gas mitigation and a stabilized digestate that could be also valorized through composting for soil enhancement (Dogan and Demirer, 2012;Behera et al, 2010). The efficiency of the process depends on various parameters that have been reported in literature, like one-or twostage systems (Nathao et al, 2013;Micolucci et al, 2018), pH Paramaguru et al, 2017), HRT Kornaros, 2014, 2015), pretreatment (Naran et al, 2016), substrate shift (Carvalheira et al, 2018), microbial community and characteristics (Zhao et al, 2018) and co-digestion which is a well-established technology with consistent results in boosting the production of gaseous biofuels (Edwards et al, 2017).…”

Electrical Conductivity for Monitoring the Expansion of the Support Material in an Anaerobic Biofilm Reactor

“…The amount of VFA produced in previous studies conducted in the two-stage AD process at pilot scale from which the substrate was obtained has been less than 5 g/L. There are studies of anaerobic digestion of FVWs where the range of VFA produced in AD process is between 1 and 5 g/L [18,29,35,36]. There are studies where the VFA production in AD of FVW exceeded 5 g/L [32,37].…”

Performance Evaluation of the Effect of pH and Temperature on the Biogas Yield of Co-Digestion of Pig Manure and Water Hyacinth

“…Anaerobic digestion is widely as a treatment option for the disposal of municipal solid waste on a par with the composting technologies. It mainly combines with the energy recovery benefits, greenhouse gas mitigation and produces stable end products, which can be further upgraded as compost for land use applications [9].…”