Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production
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2012
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1341870854 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu13418708542021-08-03T06:05:48Z Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production Brown, Dan Lee Agricultural Engineering solid-state anaerobic digestion biogas municipal solid waste food waste co-digestion lignocellulosic biomass <p>The anaerobic digestion (AD) process is generally classified into two categories based on the total solids (TS) content of the mixture in the digester. TS contents of 15% or greater are classified as solid-state anaerobic digestion (SS-AD) while TS contents of 15% or lower are classified as liquid AD. SS-AD has many advantages such as smaller reactor volume, less moving parts due to no need of agitation, acceptance of a wide range of feedstocks, and less energy demand for heating the material in the digester. </p><p>Lignocellulosic biomass is a suitable feedstock for SS-AD as it is the most abundant biomass source in the world and is generally a drier material. However, there are no reports on the comparison of SS-AD and L-AD systems in terms of methane yield and volumetric productivity. Yard waste is prevalent year round and is widely available at low cost; thus, yard waste presents itself as an ideal candidate for SS-AD. However, the methane yield of yard waste is generally lower compared to other feedstocks such as crop residues, energy crops, municipal solid waste, fats, oils, and greases (FOG). Therefore, increasing the overall methane yield of the SS-AD via co-digestion of food wastes presents itself as a viable option. Food waste is also prevalent year round, may garner tipping fees, and achieves much higher methane yields than most other substrates. </p><p>Mesophilic batch anaerobic digestion (AD) of eight lignocellulosic feedstocks including switchgrass, corn stover, wheat straw, yard waste, leaves, waste paper, maple, and pine were carried out under liquid and solid-state anaerobic digestion (SS-AD) for 30 days and evaluated for methane yield and volumetric productivity. Results showed no significant difference in methane yield between the systems except for waste paper and pine. Volumetric productivity of the feedstocks except for waste paper was 70% to 88% greater in the SS-AD system compared with the liquid system. </p><p>Solid-state mesophilic batch co-digestion was carried out for 30 days using yard waste and food waste to improve overall methane production and volumetric productivity. Results showed increased methane yields and volumetric productivities with increasing the percentage of food waste up to 10% and 20% of the feedstock for feedstock/effluent (F/E) ratio of 2 and 1, respectively. The highest methane yield of 122 L/kg volatile solids (VS) was obtained at F/E ratio of 1 and 20% food waste (based on dry VS). The highest volumetric productivity of 8.59 Lmethane/Lwork was obtained at F/E ratio of 2 and 10% food waste. The reactors with F/E ratio of 3 and 10% and 20% food waste and with F/E ratio of 2 and 20% food waste failed. Volatile solids (VS) destruction of 42.6% was maximized at F/E ratio of 2 and 10% food waste.</p><p> The results obtained from this study showed that lignocellulosic biomass can achieve comparable methane yields and increased volumetric productivities in SS-AD. In addition, co-digestion of food waste with yard waste demonstrated that overall methane yields and volumetric productivities could be enhanced over SS-AD of yard waste alone.</p> 2012-08-14 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1341870854 http://rave.ohiolink.edu/etdc/view?acc_num=osu1341870854 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Agricultural Engineering solid-state anaerobic digestion biogas municipal solid waste food waste co-digestion lignocellulosic biomass |
| spellingShingle |
Agricultural Engineering solid-state anaerobic digestion biogas municipal solid waste food waste co-digestion lignocellulosic biomass Brown, Dan Lee Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production |
| author |
Brown, Dan Lee |
| author_facet |
Brown, Dan Lee |
| author_sort |
Brown, Dan Lee |
| title |
Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production |
| title_short |
Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production |
| title_full |
Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production |
| title_fullStr |
Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production |
| title_full_unstemmed |
Comparison of Solid-State to Liquid Phase Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production |
| title_sort |
comparison of solid-state to liquid phase anaerobic digestion of lignocellulosic biomass for biogas production |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2012 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1341870854 |
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AT browndanlee comparisonofsolidstatetoliquidphaseanaerobicdigestionoflignocellulosicbiomassforbiogasproduction |
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