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首页> 外文期刊>Biotechnology Progress >Membrane Separations for Solid-Liquid Clarification Within Lignocellulosic Biorefining Processes
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Membrane Separations for Solid-Liquid Clarification Within Lignocellulosic Biorefining Processes

机译：木质纤维素生物精制过程中固液澄清的膜分离

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Membrane separations can be integrated into a biorefinery to reduce water and energy consumption. Unfortunately, current membrane materials suffer from severe fouling, which limits their applicability. Here, using analytical characterizations along with fouling models, we correlate membrane properties with performance metrics to provide a framework for optimal membrane selection during solid—liquid clarification of a biomass hydrolysate. Five membranes were evaluated: polyether sulfone, mixed cellulose esters, and three surface modified membranes with weak acid, strong acid, and weak base functionalities. Lignin was the primary component responsible for flux decline, due to physical entrapment and chemical adsorption. The best membrane performance (high and sustained flux, low fouling, and high separation factor) was correlated with higher surface roughness, lower hydrophobicity, neutral or positively charged zeta potential, and a larger number of smaller surface pores. These analyses provide valuable information for designing new materials for biorefining processes to reduce fouling and increase stability.
机译：膜分离可以整合到生物精炼厂中，以减少水和能源消耗。不幸的是，当前的膜材料遭受严重的结垢，这限制了它们的适用性。在这里，我们使用分析表征和结垢模型，将膜性能与性能指标相关联，从而为生物质水解产物的固液澄清过程中的最佳膜选择提供了框架。评价了五种膜：聚醚砜，混合纤维素酯和三种具有弱酸，强酸和弱碱官能度的表面改性膜。木质素是导致通量下降的主要成分，这归因于物理截留和化学吸附。最佳的膜性能（高和持续通量，低结垢和高分离系数）与较高的表面粗糙度，较低的疏水性，中性或带正电的ζ电势以及大量较小的表面孔相关。这些分析为设计用于生物精制工艺的新材料以减少结垢和增加稳定性提供了有价值的信息。

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