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首页> 美国卫生研究院文献>Engineering in Life Sciences >Rhamnolipid as new bio‐agent for cleaning of ultrafiltration membrane fouled by whey
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Rhamnolipid as new bio‐agent for cleaning of ultrafiltration membrane fouled by whey

机译：鼠李糖脂作为新型生物试剂用于清洁被乳清污染的超滤膜

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摘要

In this work, rhamnolipid biosurfactant as an eco‐friendly and biodegradable cleaning agent was produced by bacteria and was used to evaluate the chemical cleaning efficiency of whey fouled ultrafiltration membranes. Thin layer chromatography (TLC) and Fourier transform infrared spectroscopy (FTIR) confirmed the successful synthesis of rhamnolipid. The produced rhamnolipid was compared to chemical cleaners including sodium hydroxide (NaOH), sodium dodecyl sulfate (SDS) and Tween 20. Ultrafiltration membranes used for fouling and cleaning analysis were prepared using phase inversion via immersion precipitation technique. For studying the fouling mechanisms, Hermia's model adapted to cross‐flow was used. From the fouling mechanism experiments, it was found that the complete blocking and cake formation were the dominant fouling mechanisms. The highest values of cleaning efficiency were achieved using rhamnolipid and NaOH as cleaning agents with the flux recovery of 100%, but with considering the low concentration of the rhamnolipid used in the cleaning solution compared to NaOH (0.3 versus 4 g/L for NaOH), its application is preferred.
机译：在这项工作中，鼠李糖脂生物表面活性剂是一种由细菌生产的生态友好型，可生物降解的清洁剂，用于评估乳清污垢超滤膜的化学清洁效率。薄层色谱（TLC）和傅里叶变换红外光谱（FTIR）证实了鼠李糖脂的成功合成。将产生的鼠李糖脂与化学清洁剂进行比较，包括氢氧化钠（NaOH），十二烷基硫酸钠（SDS）和吐温20。使用浸入沉淀技术通过相转化制备用于结垢和清洁分析的超滤膜。为了研究结垢机理，使用了适合横流的Hermia模型。从结垢机理实验中发现，完全的堵塞和结块形成是主要的结垢机理。使用鼠李糖脂和NaOH作为清洁剂，通量回收率为100％，可获得最高清洁效率，但考虑到与NaOH相比，清洗液中所用鼠李糖脂的浓度较低（NaOH的浓度为0.3对4 g / L） ，它的应用程序是首选。

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