Spectroscopic sensing of membrane fouling potential in a long-term running anaerobic membrane bioreactor
Spectroscopic sensing of membrane fouling potential in a long-term running anaerobic membrane bioreactor
复制标题
长期运行的厌氧膜生物反应器中膜污染潜力的光谱传感
DOI：
10.1016/j.cej.2021.130799
复制
发表时间：
2021
影响因子：
15.1
通讯作者：
Xia Huang
中科院分区：
文献类型：
--
作者：
Jinlan Yu;Kang Xiao;Hao Xu;Ting Qi;Yitong Li;Jihua Tan;Xianghua Wen;Xia Huang
厌氧膜生物反应器（AnMBR）在废水处理中的应用受到膜污染的严重挑战。在线监测结垢潜力将有望支持智能控制的污垢。监测很可能使用光谱方法实现，但光谱指标尚待鉴定。在实验室规模的AnMBR的151天的运行中，筛选了11个紫外（UV）指示剂，19个荧光激发-发射矩阵指示剂和2个红外散射指示剂。以通量下降到50%或25%（V0.5orV0.25）时的临界过滤体积和比阻（Kcf）为基准，考察了初始孔堵塞和随后凝胶/滤饼层生长的结垢可能性。254 nm和280 nm紫外线（UV 254和UV 280）与污染指数呈显著相关，相关系数为0.57-0.77;峰1和峰2荧光强度（FIP 1和FIP 2）与污染指数呈显著相关，相关系数为0.84 ~ 0.92。统计方差分区和傅里叶变换红外分析表明，多糖类溶质主要负责污垢和UV/荧光敏感，由于它们携带的发色团/荧光片段。X-射线光电子能谱显示污垢和荧光与O=C-（R N O）含量的相关性。超高效液相色谱-质谱证实了糖单位与发色团/荧光基团的直接连接。回归模型，然后建立预测在AnMBR运行过程中的污染潜力。FIP 1和UV 280的组合使用实现了最佳的预测V0.5，V0.25和Kcf的R2分别为0.763，0.891和0.845，显示光谱传感在膜生物反应器应用的可行性。
The application of anaerobic membrane bioreactors (AnMBRs) for wastewater treatment is seriously challenged by membrane fouling. Online monitoring of the fouling potential would promisingly support smart control of fouling. The monitoring is most likely achievable using spectroscopic methods, but the spectroscopic indicators are yet to be qualified. In this study, 11 ultraviolet (UV) indicators, 19 fluorescence excitation-emission matrix indicators and 2 infrared scattering indicators were screened during 151-day operation of a lab-scale AnMBR. The critical filtration volume for flux declining to 50% or 25% (V0.5orV0.25) and the specific resistance (Kcf) were employed as benchmarks of fouling potential for initial pore blocking and subsequent gel/cake layer growth. The 254 and 280 nm UV absorbances (UV254and UV280) displayed significant correlation coefficients of 0.57–0.77 with the fouling indexes, while the Peak 1 and Peak 2 fluorescence intensities (FIP1and FIP2) displayed 0.84–0.92. Statistical variance partitioning and Fourier transform infrared analyses showed that polysaccharide-like solutes were mostly responsible for fouling and were UV/fluorescence-sensitive due to the chromophoric/fluorophoric segments they carried. X-ray photoelectron spectra revealed a correlation of fouling and fluorescence with the O=C-(R N O) content. Ultrahigh-performance liquid chromatography-mass spectrometry substantiated the direct connection of sugar units with chromophoric/fluorophoric groups. Regression models were then established to predict the fouling potential during AnMBR operation. The combined use of FIP1and UV280achieved the best prediction ofV0.5,V0.25andKcfwithR2= 0.763, 0.891 and 0.845, respectively, showing the viability of spectroscopic sensing in membrane bioreactor applications.
登录
查看更多内容
使用正面激发发射矩阵 (FF-EEM) 光谱表征超滤膜 FA 上的荧光污垢：污垢演变和机理分析
影响因子：
12.8
作者：
Yu Huarong;Wu Zijian;Zhang Xiaolei;Qu Fangshu;Wang Peng;Liang Heng
通讯作者：
Liang Heng
影响因子：
12.8
作者：
Zhigang Wang;Jing Cao;F. Meng
通讯作者：
Zhigang Wang;Jing Cao;F. Meng
废水处理废水中荧光激发-发射基质特性与 DOM 疏水性相对程度之间的关系
影响因子：
8.8
作者：
Xiao K.;Yu J.;Wang S.;Du J.;Tan J.;Xue K.;Wang Y.;Huang X.
通讯作者：
Huang X.
影响因子：
10.7
作者：
de Kruif, CG;Tuinier, R
通讯作者：
Tuinier, R
DOI：
10.1007/978-3-030-18252-6_3
发表时间：
2019-01-01
期刊：
SPECTROSCOPIC METHODS IN ORGANIC CHEMISTRY, 7 EDITION
影响因子：
--
作者：
Fleming, Ian;Williams, Dudley
通讯作者：
Williams, Dudley