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不同水热预处理方法对水稻秸秆组成结构及酶解特性的影响

王泓,  晏文菁,  杨芸芸,  马一可,  李东妮,  李俊贤,  华煜,  戴晓虎

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文章导航 > 环境工程  > 2024 >  42(9): 285-291
王泓, 晏文菁, 杨芸芸, 马一可, 李东妮, 李俊贤, 华煜, 戴晓虎. 不同水热预处理方法对水稻秸秆组成结构及酶解特性的影响[J]. 环境工程, 2024, 42(9): 285-291. doi: 10.13205/j.hjgc.202409028
引用本文: 王泓, 晏文菁, 杨芸芸, 马一可, 李东妮, 李俊贤, 华煜, 戴晓虎. 不同水热预处理方法对水稻秸秆组成结构及酶解特性的影响[J]. 环境工程, 2024, 42(9): 285-291. doi: 10.13205/j.hjgc.202409028
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WANG Hong, YAN Wenjing, YANG Yunyun, MA Yike, LI Dongni, LI Junxian, HUA Yu, DAI Xiaohu. EFFECT OF VARIOUS HYDROTHERMAL PRETREATMENTS ON COMPOSITION, STRUCTURE AND ENZYMATIC HYDROLYSIS OF RICE STRAW[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(9): 285-291. doi: 10.13205/j.hjgc.202409028
Citation: WANG Hong, YAN Wenjing, YANG Yunyun, MA Yike, LI Dongni, LI Junxian, HUA Yu, DAI Xiaohu. EFFECT OF VARIOUS HYDROTHERMAL PRETREATMENTS ON COMPOSITION, STRUCTURE AND ENZYMATIC HYDROLYSIS OF RICE STRAW[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(9): 285-291. doi: 10.13205/j.hjgc.202409028
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不同水热预处理方法对水稻秸秆组成结构及酶解特性的影响

doi: 10.13205/j.hjgc.202409028

  • 同济大学 环境科学与工程学院 污染控制与资源化研究国家重点实验室, 上海 200092

基金项目: 

中国博士后科学基金(2022M712404)

国家重点研发计划(2020YFC1908702)

国家自然科学基金项目(52200172)

详细信息
    作者简介:

    王泓(1996-),男,博士研究生,主要研究方向为有机固废处理与资源化利用。hongwang0616@163.com

    通讯作者:

    华煜(1995-),男,博士后,主要研究方向为难水解有机固废资源化基础理论与技术应用研究。1351530@tongji.edu.cn

    戴晓虎(1962-),男,教授,主要研究方向为污泥及有机固废处理与资源化。daixiaohu@tongji.edu.cn

EFFECT OF VARIOUS HYDROTHERMAL PRETREATMENTS ON COMPOSITION, STRUCTURE AND ENZYMATIC HYDROLYSIS OF RICE STRAW

  • State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

    摘要
  • 摘要: 为探明不同水热预处理方法对秸秆结构特征、化学组成和酶解特性的影响及其机制,采用了单独水热、KOH、CH3COOH、HCl、FeCl2 5种水热条件对水稻秸秆进行预处理,从物料损失、化学组分、比表面积、孔隙结构、化学结构、表面粗糙度、粒径分布及酶解后糖浓度进行分析,阐明了不同预处理方法对秸秆组成结构及酶解特性的影响机制。结果表明:碱热预处理能通过酯键的断裂从而有效去除秸秆中的木质素,木质素回收率低至46.2%;而木质素的溶出造成了孔道坍塌,相对结晶度显著增加(38.9%),孔径和比表面积减小至9.24 nm和2.62 m2/g。酸处理均能促进半纤维素的溶解,使得秸秆中形成了更多的小孔和微孔。碱热预处理后,秸秆的粒径由0.334 mm降至0.141 mm,分形维数由1.92减至1.71,疏松的结构促进了酶解反应效率,总糖浓度达到39.9 g/L,且葡萄糖和木糖占比较大,而HCl组预处理后的葡萄糖含量最高。
    Abstract: To investigate the effects and mechanisms of various hydrothermal pretreatment on the physicochemical structure, chemical composition and enzymatic hydrolysis of rice straw, four pretreatment methods, pure hydrothermal, KOH, CH3COOH, HCl and FeCl2, were all used to treat rice straw. The material loss, chemical composition, specific surface area, pore structure, chemical structure, roughness, particle size, and changes in sugar concentration after enzymatic hydrolysis were explored. The results showed that alkaline-thermal pretreatment could effectively remove the lignin from the straw by breaking the ester bond, and the lignin recovery rate decreased to 46.2%. Furthermore, the dissolution of the lignin caused a severe collapse of the internal structure of the straw. The relative crystallinity increased significantly by 38.9%, and the pore size decreased to 9.24 mm, while the surface area decreased to 2.62 m2/g. Acid treatment had a greater impact on the dissolution of hemicellulose, leading to the formation of more small pores and micropores in the straw. After alkaline-thermal pretreatment, the straw particle size was reduced from 0.334 mm to 0.141 mm, and the fractal dimension decreased from 1.92 to 1.71. The loose structure improved the efficiency of the enzymatic hydrolysis reaction. Total sugar concentration reached 39.9 g/L, mainly consisting of glucose and xylose. The highest glucose content was found in the pretreated HCl group.
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出版历程
  • 收稿日期:  2023-12-14
  • 网络出版日期:  2024-12-02

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