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Tailored Surface Porosity of Polyethylene-Based Co-continuous Structures for Moving Bed Biofilm Reactor Carriers
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-06-19 , DOI: 10.1021/acsapm.0c00380 Yi-Tao Chen 1 , Xu-Long Xie 1 , Si-Qi Zou 2 , Rui Qiu 2 , Gan-Ji Zhong 1 , Bo Lai 2 , Zhong-Ming Li 1
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-06-19 , DOI: 10.1021/acsapm.0c00380 Yi-Tao Chen 1 , Xu-Long Xie 1 , Si-Qi Zou 2 , Rui Qiu 2 , Gan-Ji Zhong 1 , Bo Lai 2 , Zhong-Ming Li 1
Affiliation
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Moving bed biofilm reactors (MBBRs) are often used in wastewater treatment. Using MBBR carriers with a porous surface is beneficial to the adhesion of microorganisms and the growth of biofilms. Polyethylene (PE) carriers with highly open and connected pores are designed by constructing a co-continuous structure of PE/polyethylene oxide (PEO) blend, which was followed by the removal of PEO with water. It is found that the extrudates of PE/PEO (w/w, 4/6) blend exhibit a co-continuous pore structure; however, PEO cannot create a porous surface. The polar rigid filler calcium carbonate (CaCO3) is proposed to be preferentially distributed in the PEO phase, thus increasing its surface energy, reaching a goal of a porous surface successfully on the base of retaining the internal co-continuous porous structure. The content and size of CaCO3 can further tune the morphology and pore size of the porous surface. The prepared PE porous carriers display a 200 μm-thick biofilm comprising a large number of filamentous bacteria and a small number of coccal and rob bacteria after an MBBR experiment for 30 days, which is also observed within the carriers as revealed by confocal laser scanning microscopy.
中文翻译：
移动床生物膜反应器载体的聚乙烯基共连续结构的定制表面孔隙率
移动床生物膜反应器（MBBR）通常用于废水处理。使用具有多孔表面的MBBR载体有利于微生物的粘附和生物膜的生长。通过构建PE /聚环氧乙烷（PEO）共混物的连续结构，然后用水去除PEO，来设计具有高度开放和连通的孔的聚乙烯（PE）载体。发现PE / PEO（w / w，4/6）共混物的挤出物表现出共连续的孔结构；但是，PEO不能产生多孔表面。极性硬质填料碳酸钙（CaCO 3提出了优选地在PEO相中分布），从而增加其表面能，在保持内部共连续多孔结构的基础上成功地达到了多孔表面的目的。CaCO 3的含量和大小可以进一步调整多孔表面的形态和孔径。经过MBBR实验30天后，制备的PE多孔载体显示出200μm厚的生物膜，其中包含大量丝状细菌以及少量的球菌和罗布细菌，共聚焦激光扫描显微镜观察也可以在载体内观察到。
更新日期：2020-08-14
中文翻译：
移动床生物膜反应器载体的聚乙烯基共连续结构的定制表面孔隙率
移动床生物膜反应器（MBBR）通常用于废水处理。使用具有多孔表面的MBBR载体有利于微生物的粘附和生物膜的生长。通过构建PE /聚环氧乙烷（PEO）共混物的连续结构，然后用水去除PEO，来设计具有高度开放和连通的孔的聚乙烯（PE）载体。发现PE / PEO（w / w，4/6）共混物的挤出物表现出共连续的孔结构；但是，PEO不能产生多孔表面。极性硬质填料碳酸钙（CaCO 3提出了优选地在PEO相中分布），从而增加其表面能，在保持内部共连续多孔结构的基础上成功地达到了多孔表面的目的。CaCO 3的含量和大小可以进一步调整多孔表面的形态和孔径。经过MBBR实验30天后，制备的PE多孔载体显示出200μm厚的生物膜，其中包含大量丝状细菌以及少量的球菌和罗布细菌，共聚焦激光扫描显微镜观察也可以在载体内观察到。
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