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Hydrothermal pretreatment of rice straw biomass: A potential and promising method for enhanced methane production

Listed author(s):
  • Chandra, R.
  • Takeuchi, H.
  • Hasegawa, T.
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    This paper presents the results of an experimental batch methane fermentation (at 37°C mesophilic temperature) study carried out on untreated and pretreated substrates of rice straw using NaOH and hydrothermal pretreatments. 3% NaOH pretreatment was given to ground rice straw biomass for 120h at 37°C and hydrothermal pretreatment was given for 10min at 200°C. It was observed that NaOH addition is a mandatory requirement for maintaining a suitable range of pH and starting the biogas production from hydrothermal pretreated biomass slurry of rice straw. The fed substrate concentrations were maintained at 5% TS (50g TS/L). The study revealed into 140.0L/kg VSa biogas and 59.8L/kg VSa methane from untreated rice straw substrate. However, NaOH pretreated substrate resulted into 184.8L/kg VSa biogas and 74.1L/kg VSa methane. Hydrothermal pretreated followed by 5% NaOH added substrate resulted into highest biogas and methane production yields as 315.9L/kg VSa and 132.7L/kg VSa, respectively. NaOH pretreated substrate showed an increase of 132.0% in biogas production and 123.9% in methane production relative to the untreated substrate. However, the hydrothermal pretreated substrate had resulted into an increase of 225.6% in biogas production and 222.0% in methane production relative to untreated rice straw substrate. Hydrothermal pretreatment provided an accelerated pre-hydrolysis of biomass contents during the treatment process and thereby resulted into enhanced biogas and methane production yields.

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    Article provided by Elsevier in its journal Applied Energy.

    Volume (Year): 94 (2012)
    Issue (Month): C ()
    Pages: 129-140

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    Handle: RePEc:eee:appene:v:94:y:2012:i:c:p:129-140
    DOI: 10.1016/j.apenergy.2012.01.027
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    1. Chen, Wei-Hsin & Tu, Yi-Jian & Sheen, Herng-Kuang, 2011. "Disruption of sugarcane bagasse lignocellulosic structure by means of dilute sulfuric acid pretreatment with microwave-assisted heating," Applied Energy, Elsevier, vol. 88(8), pages 2726-2734, August.
    2. Harun, Razif & Jason, W.S.Y. & Cherrington, Tamara & Danquah, Michael K., 2011. "Exploring alkaline pre-treatment of microalgal biomass for bioethanol production," Applied Energy, Elsevier, vol. 88(10), pages 3464-3467.
    3. Kaparaju, Prasad & Serrano, María & Angelidaki, Irini, 2010. "Optimization of biogas production from wheat straw stillage in UASB reactor," Applied Energy, Elsevier, vol. 87(12), pages 3779-3783, December.
    4. Hilkiah Igoni, A. & Ayotamuno, M.J. & Eze, C.L. & Ogaji, S.O.T. & Probert, S.D., 2008. "Designs of anaerobic digesters for producing biogas from municipal solid-waste," Applied Energy, Elsevier, vol. 85(6), pages 430-438, June.
    5. Daianova, L. & Dotzauer, E. & Thorin, E. & Yan, J., 2012. "Evaluation of a regional bioenergy system with local production of biofuel for transportation, integrated with a CHP plant," Applied Energy, Elsevier, vol. 92(C), pages 739-749.
    6. Chandra, R. & Vijay, V.K. & Subbarao, P.M.V. & Khura, T.K., 2012. "Production of methane from anaerobic digestion of jatropha and pongamia oil cakes," Applied Energy, Elsevier, vol. 93(C), pages 148-159.
    7. Demirbas, Ayhan, 2011. "Competitive liquid biofuels from biomass," Applied Energy, Elsevier, vol. 88(1), pages 17-28, January.
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