Unrevealing model compounds of soil conditioners impacts on the wheat straw autohydrolysis efficiency and enzymatic hydrolysis
Unrevealing model compounds of soil conditioners impacts on the wheat straw autohydrolysis efficiency and enzymatic hydrolysis
复制标题
未揭示的土壤改良剂模型化合物对麦秆自水解效率和酶水解的影响
DOI：
10.1186/s13068-020-01763-3
复制
发表时间：
2020-05
影响因子：
6.3
通讯作者：
Qiang Yong
中科院分区：
文献类型：
--
作者：
Xinxing Wu;Wei Tang;Chen Huang;Caoxing Huang;Chenhuan Lai;Qiang Yong
背景土壤外源灰分（EA）具有缓冲能力，对木质纤维素的自动水解提出了挑战。以前的工作集中在这一现象没有调查的作用，可溶性盐，和有机物质在这个系统中发挥作用。在此，采用磷酸钠和腐植酸钠作为代表可溶性盐和有机物的模型缓冲化合物，并将其投加到脱灰的小麦秸秆（DWS）中结果表明，随着磷酸钠和腐殖酸钠添加量的增加，土壤调理剂对小麦秸秆自水解效率的影响越来越大，而对小麦秸秆自水解效率的影响越来越大导致pH值升高（分别从4.0至5.1和从4.1至4.7）。同时，木聚糖的去除率从84.3-61.4%降低到72.3- 53.0添加1-30 g/L的磷酸钠和腐植酸钠可显著降低淀粉自水解过程中的纤维素含量，最终使自水解淀粉的酶消化率从75.4-77.2%降至47.3-57.7%结论不同类型土壤调理剂模型化合物的存在导致WS自水解过程中组分的不同。发现缺乏足够的木聚糖去除导致酶可及性的显著降低。结果表明，两种典型的土壤调理剂对WS自水解和酶水解的影响不同。
BackgroundSoil-derived exogenous ash (EA) poses a challenge toward lignocellulosic autohydrolysis due to its buffering capacity. Previous works focusing on this phenomenon have failed to also investigate the role that soluble salts, and organic matter plays in this system. Herein, sodium phosphate and sodium humate were employed as model buffering compounds representing soluble salts and organic matter and dosed into a de-ashed wheat straw (DWS) autohydrolysis process to show the potential impacts of WS attached soil conditioners on the WS autohydrolysis efficiency which would further affect the enzymatic digestibility of autohydrolyzed WS.ResultsResults showed that with the increasing loadings of sodium phosphate and sodium humate resulted in elevated pH values (from 4.0 to 5.1 and from 4.1 to 4.7, respectively). Meanwhile, the reductions of xylan removal yields from ~ 84.3–61.4% to 72.3–53.0% by loading (1–30 g/L) sodium phosphate and sodium humate during WS autohydrolysis lead to a significant decrease of cellulose accessibilities which finally lead to a reduction of the enzymatic digestibility of autohydrolyzed WS from ~ 75.4–77.2% to 47.3–57.7%.ConclusionThe existence of different types soil conditioner model compounds results in various component fractions from autohydrolyzed WS in the process of autohydrolysis. A lack of sufficient xylan removal was found to drive the significant decrease in enzymatic accessibility. The results demonstrated the various effects of two typical tested soil conditioners on WS autohydrolysis and enzymatic hydrolysis.
登录
查看更多内容
影响因子：
5.3
作者：
通讯作者：
--
影响因子：
5.9
作者：
F. Khalili;H. Amiri
通讯作者：
F. Khalili;H. Amiri
影响因子：
7.4
作者：
Vicki S. Thompson;J. Lacey;Damon S. Hartley;M. Jindra;John E. Aston;D. Thompson
通讯作者：
Vicki S. Thompson;J. Lacey;Damon S. Hartley;M. Jindra;John E. Aston;D. Thompson
影响因子：
8.7
作者：
Saini, Jitendra Kumar;Patel, Anil Kumar;Singhania, Reeta Rani
通讯作者：
Singhania, Reeta Rani
影响因子：
5.9
作者：
Li, Xiaoyun;Xu, Rui;Si, Chuanling
通讯作者：
Si, Chuanling