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Enteromorpha prolifera polysaccharide based coagulant aid for humic acids removal and ultrafiltration membrane fouling control.
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2020-02-24 , DOI: 10.1016/j.ijbiomac.2020.02.273
Shuang Zhao 1 , Qianshu Sun 2 , Yingqiu Gu 1 , Weihua Yang 1 , Yun Chen 3 , Jing Lin 4 , Mengyao Dong 5 , Haoyan Cheng 6 , Hao Hu 6 , Zhanhu Guo 3
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2020-02-24 , DOI: 10.1016/j.ijbiomac.2020.02.273
Shuang Zhao 1 , Qianshu Sun 2 , Yingqiu Gu 1 , Weihua Yang 1 , Yun Chen 3 , Jing Lin 4 , Mengyao Dong 5 , Haoyan Cheng 6 , Hao Hu 6 , Zhanhu Guo 3
Affiliation
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Polyacrylamide (PAM) has been used as a coagulant aid in water treatment process for past decades, but it has caused great damages to human nervous system. Developing new coagulant aid with high biological safety is urgently demanded. This study provides a natural biomacromolecule coagulant aid with good biosecurity-Enteromorpha prolifera polysaccharide (Ep). Its coagulant aid efficiency and mechanism were investigated in terms of organics removal, floc properties and membrane fouling degree. In addition, contrast experiments were conducted with PAM to evaluate its potential of industrial applications. Results showed that organics removal could be increased by 23% when 0.3 mg/L Ep was used, which exhibited comparable aid effects to PAM. Due to the bridging-sweep aid role of Ep, flocs sizes, growth rate and recovery factor reached 470 μm, 62.6 μm/min and 0.492, respectively, while only 170 μm, 14.0 μm/min and 0.326 were obtained by PAM. Additionally, flocs exhibited more porous and multi-branched structures when Ep was applied, which caused less ultrafiltration membrane fouling (eventual J/J0 value = 0.52). As a result, Ep could be considered as a potential substitute of PAM, since better biosecurity, higher organics removal and lower membrane fouling could be obtained simultaneously by Ep addition.
中文翻译：
基于肠morph虫多糖的凝血助剂，用于腐殖酸去除和超滤膜结垢控制。
聚丙烯酰胺（PAM）在水处理过程中已被用作助凝剂，但它已对人类神经系统造成了巨大损害。迫切需要开发具有高生物安全性的新型凝血助剂。这项研究提供了一种具有良好生物安全性的天然大分子凝血助剂-肠Enter小肠多糖（Ep）。从有机物去除，絮凝特性和膜污染程度等方面研究了其助凝剂的效率和机理。此外，PAM进行了对比实验，以评估其工业应用潜力。结果表明，当使用0.3 mg / L Ep时，有机物去除率可提高23％，这显示出与PAM相当的辅助效果。由于Ep的桥联扫除作用，絮凝物的大小，生长速率和回收率达到470μm，62。通过PAM仅获得6μm/ min和0.492，而仅获得170μm，14.0μm/ min和0.326。此外，絮凝剂在使用Ep时表现出更多的多孔和多分支结构，这导致较少的超滤膜结垢（最终J / J0值= 0.52）。因此，Ep可以被认为是PAM的潜在替代品，因为通过添加Ep可以同时获得更好的生物安全性，更高的有机物去除率和更低的膜污染。
更新日期：2020-02-25
中文翻译：
基于肠morph虫多糖的凝血助剂，用于腐殖酸去除和超滤膜结垢控制。
聚丙烯酰胺（PAM）在水处理过程中已被用作助凝剂，但它已对人类神经系统造成了巨大损害。迫切需要开发具有高生物安全性的新型凝血助剂。这项研究提供了一种具有良好生物安全性的天然大分子凝血助剂-肠Enter小肠多糖（Ep）。从有机物去除，絮凝特性和膜污染程度等方面研究了其助凝剂的效率和机理。此外，PAM进行了对比实验，以评估其工业应用潜力。结果表明，当使用0.3 mg / L Ep时，有机物去除率可提高23％，这显示出与PAM相当的辅助效果。由于Ep的桥联扫除作用，絮凝物的大小，生长速率和回收率达到470μm，62。通过PAM仅获得6μm/ min和0.492，而仅获得170μm，14.0μm/ min和0.326。此外，絮凝剂在使用Ep时表现出更多的多孔和多分支结构，这导致较少的超滤膜结垢（最终J / J0值= 0.52）。因此，Ep可以被认为是PAM的潜在替代品，因为通过添加Ep可以同时获得更好的生物安全性，更高的有机物去除率和更低的膜污染。
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