Open-cell polyvinylidene fluoride foams as carriers to promote biofilm growth for biological wastewater treatment,Polymer Engineering and Science

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Open-cell polyvinylidene fluoride foams as carriers to promote biofilm growth for biological wastewater treatment
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-07-09 , DOI: 10.1002/pen.25741
Pardis Ghahramani ₁ , Ahmed Eldyasti ₂ , Siu N. Leung ₁

Affiliation

This article reports the design and fabrication of open-cell polyvinylidene fluoride (PVDF) foams as carriers that can promote biofilm growth and organic removal efficiency for biological wastewater treatment in attached growth bioreactors. Open-cell PVDF foams were fabricated by a manufacturing approach that integrated compression molding and particulate leaching. PVDF carriers were structured with two governing factors of leaching agent types (e.g., sodium chloride [NaCl] and sodium acetate [NaOAc]) and contents (e.g., 80 and 90 wt%). Open-cell PVDF foams possessed high porosity and high protected surface area (i.e., more than ×10 to ×20 of the areas of commercialized carriers), which promoted biofilm growth in these carriers. As a successful advantage, PVDF carriers used in the moving bed biofilm reactors (MBBR) were entirely covered by biofilm in both interior and exterior parts without clogging. This provides strong evidence of the bacterial compatibility of the fabricated open-cell PVDF foam carriers. Moreover, the specific morphology of the PVDF carriers in this article provided superior biofilm protection from the detachment in MBBR. Experimental results revealed that PVDF open-cell foams fabricated by 80 wt% of NaCl demonstrated higher mechanical strength with an organic removal efficiency of 77% ± 7% in the corresponding bioreactor containing them.

中文翻译：

开孔聚偏氟乙烯泡沫作为载体促进生物废水处理的生物膜生长

本文报道了开孔聚偏二氟乙烯 (PVDF) 泡沫作为载体的设计和制造，可促进生物膜生长和有机物去除效率，用于附着生长生物反应器中的生物废水处理。开孔 PVDF 泡沫是通过集成压缩成型和颗粒浸出的制造方法制造的。PVDF 载体由浸出剂类型（例如，氯化钠 [NaCl] 和乙酸钠 [NaOAc]）和含量（例如，80 和 90 wt%）两个控制因素构成。开孔 PVDF 泡沫具有高孔隙率和高保护表面积（即超过商业化载体面积的 10 至 20 倍），这促进了这些载体中生物膜的生长。作为成功的优势，移动床生物膜反应器 (MBBR) 中使用的 PVDF 载体在内部和外部部件中完全被生物膜覆盖而不会堵塞。这为制造的开孔 PVDF 泡沫载体的细菌相容性提供了强有力的证据。此外，本文中 PVDF 载体的特定形态为 MBBR 中的脱离提供了卓越的生物膜保护。实验结果表明，由 80 wt% NaCl 制备的 PVDF 开孔泡沫在含有它们的相应生物反应器中表现出更高的机械强度，有机物去除效率为 77% ± 7%。本文中 PVDF 载体的特定形态为 MBBR 中的脱离提供了卓越的生物膜保护。实验结果表明，由 80 wt% NaCl 制备的 PVDF 开孔泡沫在含有它们的相应生物反应器中表现出更高的机械强度，有机物去除效率为 77% ± 7%。本文中 PVDF 载体的特定形态为 MBBR 中的脱离提供了卓越的生物膜保护。实验结果表明，由 80 wt% NaCl 制备的 PVDF 开孔泡沫在含有它们的相应生物反应器中表现出更高的机械强度，有机物去除效率为 77% ± 7%。

更新日期：2021-08-05

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