聚氨酯
生物膜
细菌
制作
沸石
氮气
化学工程
封装(网络)
化学
微生物学
生物降解
材料科学
生物
催化作用
生物化学
有机化学
计算机科学
替代医学
病理
计算机网络
工程类
医学
遗传学
作者
Qinyi Xiong,Qu Jin,Ruojin Zhao,Yinyan Chen,Yiyi Li,Weiping Xu,Biwen Pan,Peng Jin,Zhanwang Zheng
标识
DOI:10.1093/lambio/ovac054
摘要
Biofilms are used widely to remove nitrogen from wastewater; however, most biofilm carriers (i.e. polyurethane foam, PUF) are hydrophobic organic materials with millimetre-scale apertures, ineffective attachment, and unstable colonization of microorganisms. To address these limitations, hydrophilic sodium alginate (SA) mixed with zeolite powder (Zeo) was cross-linked in PUF to form a micro-scale hydrogel (PAS) with a well-organized and reticular cellular structure. Scanning electron microscopy revealed that immobilized cells were entrapped in the interior of hydrogel filaments and rapidly formed a stable biofilm on the surface. The biofilm generated was 10.3-fold greater than the film developed on PUF. Kinetics and isotherm studies revealed that the as-developed carrier, because of the presence of Zeo, effectively improved the adsorption of NH4+-N by 53%. The PAS carrier achieved total nitrogen removal in excess of 86% for low carbon-to-nitrogen ratio wastewater treated for 30 d, indicating that this novel modification-encapsulation technology has potential for wastewater treatment.
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