Effects of magnetic nanoparticles on aerobic granulation process
Effects of magnetic nanoparticles on aerobic granulation process
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磁性纳米颗粒对好氧造粒过程的影响
DOI：
10.1016/j.biortech.2016.12.038
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发表时间：
2017-03-01
影响因子：
11.4
通讯作者：
Ni, Shou-Qing
中科院分区：
文献类型：
--
作者：
Liang, Xue-You;Gao, Bao-Yu;Ni, Shou-Qing
研究了一种将磁性纳米颗粒引入活性污泥系统的颗粒化新策略。对颗粒污泥的物化特性（外观、粒径、污泥体积指数、化学需氧量）的研究表明，MNP能够缩短颗粒污泥的造粒时间，提高生物量的截留率，同时增强颗粒污泥的致密结构。胞外聚合物（EPS）的分泌和功能基团，尤其是O-H和C=O，在MNP的长期影响下也发生了显著变化。R2（添加MNP）的蛋白质（PN）和多糖（PS）含量分别为95.7523 mg/gVSS和43.7129 mg/gVSS，而R1（不添加MNP）的PN和PS含量分别为85.7523 mg/gVSS和32.8632 mg/gVSS。污泥与水的接触角随着MNP浓度的增加而显著增大，说明MNP的加入可以提高污泥表面的疏水性，对污泥的聚集过程起到积极作用。(C)2016爱思唯尔有限公司版权所有
A novel granulation strategy by introducing magnetic nanoparticles (MNPs) into activated sludge system was investigated in this study. The study of the physicochemical characteristics (appearances, sizes, sludge volume index, and chemical oxygen demand) demonstrated that MNPs could decrease the granulation time and improve the retention of biomass, meanwhile enhanced the compact structure of the granules. The secretion and functional groups especially O-H and C=O of extracellular polymeric substances (EPS) also had significant changes under the long-term influence of MNPs. The contents of proteins (PN) and polysaccharides (PS) in R2 (with MNPs) were 95.7523 mg/gVSS and 43.7129 mg/gVSS, while in R1 (without MNPs) they were 85.7523 mg/gVSS and 32.8632 mg/gVSS, respectively. The contact angles of sludge against water dramatically increased with the increase of MNPs concentration, which means that the addition of MNPs could improve the sludge surface hydrophobicity, playing a positive role in the aggregation process. (C) 2016 Elsevier Ltd. All rights reserved.