{"id":5318,"date":"2024-06-16T12:00:21","date_gmt":"2024-06-16T04:00:21","guid":{"rendered":"https:\/\/woodrefinery.com\/zhenfang\/?p=5318"},"modified":"2024-06-16T12:00:53","modified_gmt":"2024-06-16T04:00:53","slug":"5318-2","status":"publish","type":"post","link":"https:\/\/woodrefinery.com\/zhenfang\/5318-2\/","title":{"rendered":"\u51b7\u51bb\u9884\u5904\u7406\u79f8\u79c6Thermodynamic modeling of freeze pretreatment in the destruction of rice straw structure combined with alkaline-hydrothermal method for enzymatic hydrolysis"},"content":{"rendered":"

Thermodynamic modeling of freeze pretreatment in the destruction of rice straw structure combined with alkaline-hydrothermal method for enzymatic hydrolysis<\/strong><\/p>\n

Recently, PhD student Miss Qian Dong supervised by Prof. Zhen Fang<\/strong> published a research article in Bioresource Technology about freeze-pretreatment modeling and its combination with alkaline-hydrothermal method to enhance enzymatic hydrolysis of rice straw.<\/p>\n

Freeze pretreatment combined with alkaline-hydrothermal method of rice straw for enzymatic hydrolysis was studied. Crystallization stress in the rice stem pores caused by water freezing at -20\u2013 -40 \u00b0C was modeled to illustrate the destruction mechanism. The stress was calculated as 22.5\u201338.3 MPa that were higher than the tensile yield stress of untreated stems (3.0 MPa), indicating ice formation damaging pore structure. After freeze at -20 \u00b0C, rice straw was further hydrothermally treated at 190 \u00b0C with 0.4 M<\/em> Na2<\/sub>CO3<\/sub>, achieving 72.0 % lignin removal and 97.2 % cellulose recovery. Glucose yield rose to 91.1 % by 4.3 times after 24 h hydrolysis at 10 FPU loading of Cellic\u00aeCTec2 cellulase. The specific surface area of rice straw was 2.6 m2<\/sup>\/g increased by 1.2 times after freeze. Freeze combined with alkaline-hydrothermal treatment is a green and energy-efficient method for improving enzymatic hydrolysis.<\/p>\n

Related results were published in Bioresource Technology:<\/p>\n

Q\u00a0Dong, CX\u00a0Gong,\u00a0GL\u00a0Xie,\u00a0GQ\u00a0Zhu,\u00a0Zhen<\/strong>\u00a0<\/strong>Fang*<\/strong>. Thermodynamic modeling of freeze pretreatment in the destruction of rice straw structure combined with alkaline-hydrothermal method for enzymatic hydrolysis. Bioresource Technology <\/a>(IF 11.9), 403 (2024)<\/strong>, 130864. https:\/\/doi.org\/10.1016\/j.biortech.2024.130864<\/a>.<\/p>\n

\"\"<\/p>\n

Crystallization stress in the rice stem pores was 33 MPa after freeze 4 times at -20 \u00b0C. Rice straw was pretreated by freeze-Na2<\/sub>CO3<\/sub>-hydrothermal treatment with 91.1% glucose yield after 24 h enzymatic hydrolysis. \uff08\u5728-20 \u00b0C\u6761\u4ef6\u4e0b\u51b7\u51bb4\u6b21\u540e\uff0c\u6c34\u7a3b\u830e\u79c6\u5b54\u5185\u6c34\u4ea7\u751f\u7684\u7ed3\u6676\u5e94\u529b\u4e3a33 MPa\u3002\u91c7\u7528\u51b7\u51bb\u8f85\u52a9Na2<\/sub>CO3<\/sub>\u6c34\u70ed\u9884\u5904\u7406\u7a3b\u79c6\uff0c\u9176\u89e324 h\u540e\u8461\u8404\u7cd6\u4ea7\u7387\u4e3a91.1%\u3002\uff09<\/p>\n

 <\/p>\n

\u51b7\u51bb\u9884\u5904\u7406\u70ed\u529b\u5b66\u5efa\u6a21\u53ca\u5176\u7ed3\u5408\u78b1\u6027\u6c34\u70ed\u6cd5\u7834\u574f\u7a3b\u79c6\u7ed3\u6784\u7528\u4e8e\u9176\u89e3<\/strong><\/p>\n

\u8fd1\u671f\uff0c\u535a\u58eb\u751f\u8463\u5029\u540c\u5b66\u5728\u65b9\u771f\u6559\u6388<\/strong>\u7684\u6307\u5bfc\u4e0b\uff0c\u5728\u56fd\u9645\u5b66\u672f\u671f\u520aBioresource Technology (Q1\uff0cIF 11.4)\u53d1\u8868\u4e00\u7bc7\u5173\u4e8e\u51b7\u51bb\u9884\u5904\u7406\u70ed\u529b\u5b66\u5efa\u6a21\u53ca\u5176\u7ed3\u5408\u78b1\u6027\u6c34\u70ed\u6cd5\u5904\u7406\u6c34\u7a3b\u79f8\u79c6\u7528\u4e8e\u9176\u89e3\u7684\u7814\u7a76\u6027\u8bba\u6587\u3002<\/p>\n

\u91c7\u7528\u51b7\u51bb\u8054\u5408\u78b1\u6c34\u70ed\u9884\u5904\u7406\u6c34\u7a3b\u79f8\u79c6\u3002\u901a\u8fc7\u5efa\u7acb\u6c34\u7a3b\u830e\u79c6\u4e2d\u6c34\u51bb\u7ed3(-20\u2013 – 40 \u00b0C)\u5f15\u8d77\u7684\u7ed3\u6676\u5e94\u529b\u6a21\u578b\u6765\u9610\u660e\u51b7\u51bb\u9884\u5904\u7406\u7684\u7834\u574f\u673a\u5236\u3002\u51b7\u51bb\u4ea7\u751f\u7684\u7ed3\u6676\u5e94\u529b\u4e3a22.5\u201338.3 MPa\uff0c\u9ad8\u4e8e\u672a\u5904\u7406\u830e\u79c6\u7684\u62c9\u4f38\u5c48\u670d\u5e94\u529b(3.0 MPa)\uff0c\u8868\u660e\u51b7\u51bb\u9884\u5904\u7406\u7834\u574f\u4e86\u6c34\u7a3b\u830e\u79c6\u7684\u5b54\u9699\u7ed3\u6784\u3002\u6c34\u7a3b\u79f8\u79c6\u5728-20 \u00b0C\u51b7\u51bb\u540e\u8fdb\u884c\u78b1\u6c34\u70ed\u5904\u7406(190 \u00b0C, 0.4 M<\/em> Na2<\/sub>CO3<\/sub>)\uff0c\u6728\u8d28\u7d20\u53bb\u9664\u7387\u4e3a72.0%\uff0c\u7ea4\u7ef4\u7d20\u56de\u6536\u7387\u4e3a97.2%\u3002\u572810 FPU Cellic\u00aeCTec2\u7ea4\u7ef4\u7d20\u9176\u8d1f\u8f7d\u4e0b\u6c34\u89e324 h\u540e\uff0c\u8461\u8404\u7cd6\u7684\u4ea7\u7387\u63d0\u9ad8\u4e864.3\u500d\uff0c\u8fbe\u523091.1%\u3002\u51b7\u51bb\u9884\u5904\u7406\u540e\uff0c\u6c34\u7a3b\u79f8\u79c6\u6bd4\u8868\u9762\u79ef\u4e3a2.6 m2<\/sup>\/g\uff0c\u63d0\u9ad8\u4e861.2\u500d\u3002\u51b7\u51bb\u8054\u5408\u78b1\u6027\u6c34\u70ed\u5904\u7406\u662f\u4e00\u79cd\u7eff\u8272\u8282\u80fd\u7684\u6539\u5584\u9176\u89e3\u7684\u65b9\u6cd5\u3002<\/p>\n

\u7ed3\u679c\u53d1\u8868\u5728Bioresource Technology\uff1a<\/p>\n

Q\u00a0Dong, CX\u00a0Gong,\u00a0GL\u00a0Xie,\u00a0GQ\u00a0Zhu,\u00a0Zhen<\/strong>\u00a0<\/strong>Fang*<\/strong>. Thermodynamic modeling of freeze pretreatment in the destruction of rice straw structure combined with alkaline-hydrothermal method for enzymatic hydrolysis. Bioresource Technology <\/a>(IF 11.9), 403 (2024)<\/strong>, 130864. https:\/\/doi.org\/10.1016\/j.biortech.2024.130864<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Thermodynamic modeling of freeze pretreatment in the de […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/5318"}],"collection":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/comments?post=5318"}],"version-history":[{"count":2,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/5318\/revisions"}],"predecessor-version":[{"id":5321,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/posts\/5318\/revisions\/5321"}],"wp:attachment":[{"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/media?parent=5318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/categories?post=5318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/woodrefinery.com\/zhenfang\/wp-json\/wp\/v2\/tags?post=5318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}