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Alkaline pretreatment was employed to enhance biogas production from asparagus stover with anaerobic digester in laboratory scale batch fermentation. Different pretreatment times (10, 18, 25 days), NaOH concentrations (2.5, 5, 7.5%), and water dose (20, 60, 100 mL) were tested to select the best pretreatment conditions. With response surface method (RSM) applied, the optimum pretreatment conditions...
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