Optimization of conditions for promoting biogas production with hydrothermal pretreatment for straw
QIAN Yu-ting, DU Jing, CHEN Guang-yin, HUANG Hong-ying, JIN Hong-mei, XI Yong-lan, XU Yue-ding, CHANG Zhi-zhou
East China Scientific observing and Experimental Station of Development and Utilization of Rural Renewable Energy, Ministry of Agriculture, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Effects of physic-chemical properties and biogas production were studied through orthogonal experiment with different hydrothermal pretreatment conditions, in the basis of the preliminary optimization of single factor test and with rice straw as raw material. The results showed that there has different impact on the 20days cumulative biogas production of anaerobic fermentation with rice straw for three factors, which including pre-leaching time and content of initial moisture with materials and heating time. The order of the effect on the cumulative TS yield of anaerobic fermentation for each factor is that content of initial moisture with materials > pre-leaching time > heating time; the condition that the initial water content of 55%, leaching time of two hours, the heating time of six hours were considered as the best condition. The 20days cumulative biogas production with rice straw under this optimum pretreatment conditions is increased by 29.79%, the time of biogas production reached 60% and 80% of the total gas production can be reduced five days compared with CK. And the result showed that the mild hydrothermal pretreatment promoting the degradation of cellulose and hemi-cellulose and make it more converted to volatile fatty acids (VFA), which is conducive to rapid biogas production of rice straw, combined with analysis of the changes of physical and chemical properties. The mild hydrothermal pretreatment process parameters that provided technical support and theoretical basis for the operation of straw biogas project were obtained from this experiment.
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Merali Z,Ho J D,Collins S R,et al.Characterization of cell wall components of wheat straw following hydrothermal pretreatment and fractionation[J].Bioresource Technology,2013,131:226-234.
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Chandra R,Takeuchi H,Hasegawa T.Hydrothermal pretreatment of rice straw biomass:a potential and promising method for enhanced methane production[J].Appl.Energy,2012,94:129-140.
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Rogalinski T,Liu K,Albrecht T,et al.Hydrolysis kinetics of biopolymers in subcritical water[J].J Supercrit Fluids,2008,46:335-341.
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Peterson A A,Vogel F,Lachance R P,et al.Thermo-chemical biofuel production in hydrothermal media:a review of suband supercritical water technologies[J].Energy Environ Sci,2008,1:32-65.
[9]
Jiang W,Chang S,Li H,et al.Liquid hot water pretreatment on different parts of cotton stalk to facilitate ethanol production[J].Bioresource Technology,2015,176:175-180.
[10]
Alvira P,Tomas-Pejo E,Ballesteros M,et al.Pretreatment technologies for an efficient bioethanol production process based on enzymatic hydrolysis:A review[J].Bioresource Technology,2010,101(13):4851-4861.
[11]
Rabermanolontsoa H,Saka S.Various pretreatments of lignocellulosics[J].Bioresource Technology,2016,199:83-91.
[12]
Zhang X,Wang W,Yu Q,et al.Liquid hot water pretreatment of lignocellulosic biomass for bioethanol production accompanying with high valuable products[J].Bioresource Technology,2016,199:68-75.
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肖领平.木质生物质水热资源化利用过程机理研究[D].北京:北京林业大学,2014.
[14]
Leza H A R.Process development for bioethanol production using wheat straw biomass[D].Portugal:Universidade do Minho,2011.
[15]
Laser M,Schulman D,Allen S G,et al.A comparison of liquid hot water and steam pre-treatments of sugar cane bagasse for bioconversion to ethanol[J].Bioresour Technol,2002,81:33-44.
[16]
Brownell HH,Yu E K C,Saddler J N.Steam-explosion pretreatment of wood:effect of chip size,acid,moisture content and pressure drop[J].Biotechnol Bioeng,1986,28:792-801.
Van Soest P J.Use of detergents in the analysis of fibrous feeds,I Preparation of fiber residues of low nitrogen content[J].Journal of the Association of Official Analytical Chemistry,1963,46:825-829.
Pavlostathis S G,Miller T L,Wolin M J.Kinetics of insoluble cellulose fermentation by cultures of ruminococcus albus[J].Appl.Environ.Microbiol.,2007,54(11):2660-2663.
[25]
Kubler H.Full scale co-digestion of organic waste[J].Wat.Sci.Tech.,2000,41(3):195-202.
[26]
Mata-Alvarez J,Mace S,Llabres P.Anaerobic digestion of organic solid wastes-An overview of research achievements and perspectives[J].Bioresource Technology,2000,74(l):3-16.
[27]
Chayanon Sawatdeenarunat,K C.Surendra,Devin Takara,et al.Anaerobic digestion of lingo-cellulosic biomass:Challenges and opportunities[J].Bioresource Technology,2015,178:178-186.
[28]
Hendriks A T W M,Zeeman G.Pretreatments to enhance the digestibility of lignocellulosic biomass[J].Bioresource Technology,2009,100(1):10-18.
[29]
Gregg D,Saddler J N.A techno-economic assessment of the pretreatment and fractionation steps of a biomass-to-ethanol process[J]Appl.Biochem.Biotechnol.,1996,711-727.
