Pretreatment of Rice Straw Using Maleic Acid Combined with Alkali for Recovery of Xylose and Glucose
The aim is to recover xylose and glucose from rice straw by maleic acid combined with alkali pretreatment.The xylose recovery through maleic acid and sulfuric acid pretreatment of rice straw was compared under different temperatures.Then,the residue obtained after maleic acid pretreatment was delignified by alkali.Finally,the enzymatic hydrolysis of the residue was conducted to release glucose.The maximum xylose recovery reached 72.12%when the temperature was 150℃.Additionally,the enzymatic glucose yield was only 39.12%after enzymatic hydrolysis of the rice straw residue.However,the glucose yield increased to 83.17%after the residue was delignified by 2%NaOH at 80℃ for 12 h.
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