Influence of Particle Size and Alkaline Pretreatment on the Anaerobic Digestion of Corn Stover

The influence of particle size and an alkaline pretreatment on the anaerobic digestion of corn stover was studied. Four particle sizes, 0.075 to 0.25, 0.25 to 1.0, 1.0 to 5.0, and 5.0 to 20.0 mm, were used. The highest and lowest methane yields were obtained from untreated corn stover at particle sizes of 0.25 to 1.0 and 5.0 to 20.0 mm, respectively. 4% NaOH and 2% Ca(OH)2 (combined alkaline pretreatment, CAP) were then used together to pretreat corn stover at these two particle sizes, compared with 6% NaOH pretreatment (single alkaline pretreatment, SAP). The cumulative methane yields from particle sizes 0.25 to 1.0 mm after CAP, 0.25 to 1.0 mm after SAP, 5.0 to 20.0 mm after CAP, and 5.0 to 20.0 mm after SAP were 286.9, 287.0, 268.7, and 272.6 mLg-1 VS, respectively. The particle size barely influenced the final cumulative methane yield of alkali-treated corn stover. Moreover, the cumulative methane yield of the corn stover after CAP was comparable with that of the corn stover after the SAP under the same conditions. These results provide us with a promising substitute of NaOH pretreatment for corn stover bioconversion in the future.

[1]  Jian Shi,et al.  Enhancing the solid-state anaerobic digestion of fallen leaves through simultaneous alkaline treatment. , 2011, Bioresource technology.

[2]  Ram Chandra,et al.  Improving biodegradability and biogas production of wheat straw substrates using sodium hydroxide and hydrothermal pretreatments , 2012 .

[3]  Mark T. Holtzapple,et al.  Lime pretreatment of crop residues bagasse and wheat straw , 1998 .

[4]  M. Holtzapple,et al.  Lime pretreatment and enzymatic hydrolysis of corn stover. , 2005, Bioresource technology.

[5]  P. V. Soest,et al.  Methods for dietary fiber, neutral detergent fiber, and nonstarch polysaccharides in relation to animal nutrition. , 1991, Journal of dairy science.

[6]  Mark T. Holtzapple,et al.  Using lime pretreatment to facilitate the enzymic hydrolysis of corn stover , 2000 .

[7]  Xiujin Li,et al.  Investigation on the Changes of Main Compositions and Extractives of Rice Straw Pretreated with Sodium Hydroxide for Biogas Production , 2009 .

[8]  B. Mattiasson,et al.  Effect of particle size on biogas yield from sisal fibre waste , 2006 .

[9]  T. Toda,et al.  Effects of particle size on anaerobic digestion of food waste , 2010 .

[10]  R. A. Nordstedt,et al.  Batch anaerobic digestion of water hyacinth: Effects of particle size, plant nitrogen content, and inoculum volume , 1993 .

[11]  Caixia Wan,et al.  Enhanced solid-state anaerobic digestion of corn stover by alkaline pretreatment. , 2010, Bioresource technology.

[12]  Gumersindo Feijoo,et al.  Sodium inhibition in the anaerobic digestion process: Antagonism and adaptation phenomena , 1995 .

[13]  C. Wyman,et al.  Features of promising technologies for pretreatment of lignocellulosic biomass. , 2005, Bioresource technology.

[14]  Xiujin Li,et al.  Enhancing anaerobic biogasification of corn stover through wet state NaOH pretreatment. , 2009, Bioresource technology.

[15]  G. Zeeman,et al.  Pretreatments to enhance the digestibility of lignocellulosic biomass. , 2009, Bioresource technology.

[16]  Jay J. Cheng,et al.  Pretreatment of switchgrass for sugar production with the combination of sodium hydroxide and lime. , 2011, Bioresource technology.

[17]  P. Mccarty,et al.  Bioassay for monitoring biochemical methane potential and anaerobic toxicity , 1979 .

[18]  Ratna R. Sharma-Shivappa,et al.  Lime pretreatment of switchgrass at mild temperatures for ethanol production. , 2010, Bioresource technology.

[19]  P Balsari,et al.  The effect of particle size and thermal pre-treatment on the methane yield of four agricultural by-products. , 2012, Bioresource technology.

[20]  J. P. Frost,et al.  Effects of thermo-chemical pre-treatment of grass silage on methane production by anaerobic digestion. , 2011, Bioresource technology.

[21]  Ruihong Zhang,et al.  Biogas production from co-digestion of dairy manure and food waste. , 2010, Bioresource technology.

[22]  Xiujin Li,et al.  Improving Biodegradability and Biogas Production of Corn Stover through Sodium Hydroxide Solid State Pretreatment , 2008 .

[23]  Kuisheng Wang,et al.  Physicochemical Characterization of Rice Straw Pretreated with Sodium Hydroxide in the Solid State for Enhancing Biogas Production , 2008 .