Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10136229 | Energy | 2018 | 37 Pages |
Abstract
In this study, a novel attempt has been made to generate energy-efficient biomethane from marine macroalgae (Chaetomorpha antennina) by coupling thermochemical liquefaction with a disperser (thermo-chemo disperser (TCD) liquefaction). A temperature of (80â¯Â°C), pH 11 and disperser g-force of 1613â¯g were considered optimal parameters for effective solubilization and energy-efficient methane generation. This combinative liquefaction considerably reduced the treatment time and specific energy from 60 to 15â¯min and 6294 to 800â¯kJ/kg TS. The highest volatile fatty acids (VFA) accumulation of 890â¯mg/L was recorded in TCD compared to a thermo disperser (TD) (750â¯mg/L) and disperser (D) (322â¯mg/L) during anaerobic fermentation. TCD enhances the methane production potential of macroalgal biomass and a higher methane production of 215â¯mL/g VS was achieved for TCD compared to TD (149â¯mL/g VS) and D samples (100â¯mL/g VS), respectively. Cost analysis confirmed the field applicability of TCD liquefaction with a net profit of 90 USD/ton of marine macroalgae. A high energy ratio of 1.5 was achieved with the proposed mode of pretreatment (TCD) compared to TD (0.95) and D (0.28) pretreatment. Therefore, C. antennina is considered a suitable feedstock for methane generation.
Related Topics
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Authors
K. Tamilarasan, S. Kavitha, Ammaiyappan Selvam, J. Rajesh Banu, Ick Tae Yeom, Dinh Duc Nguyen, Ganesh Dattatraya Saratale,