Optimization of the Alkaline Pretreatment of Rice Straw for Enhanced Methane Yield

<table>Daily  methane production for each pretreatment of rice straw. (a) 4% Ca(OH)<sub>2</sub> pretreatment; (b) 8% Ca(OH)<sub>2</sub> pretreatment; (c) 12% Ca(OH)<sub>2</sub> pretreatment.</table>

BioMed Research International

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Figure 2

Figure 2: Optimization of the Alkaline Pretreatment of Rice Straw for Enhanced Methane Yield 