| Enhanced removal of organic matter and typical disinfection byproduct precursors in combined iron–carbon micro electrolysis-UBAF process for drinking water pre-treatment |
| |
| 作者姓名： | Yinghan Chen Tao Lin Wei Chen |
| |
| 基金项目： | the National Natural Science Foundation of China;the Major Science and Technology Program for Water Pollution Control and Treatment;the Qing Lan Project,and the Priority Academic Program Development of Jiangsu Higher Education Institutions |
| |
| 摘 要： | The organic matter and two types of disinfection byproduct(DBP) precursors in micropolluted source water were removed using an iron–carbon micro-electrolysis(ICME)combined with up-flow biological aerated filter(UBAF) process. Two pilot-scale experiments(ICME-UBAF and UBAF alone) were used to investigate the effect of the ICME system on the removal of organic matter and DBP precursors. The results showed that ICME pretreatment removed 15.6% of dissolved organic matter(DOM)and significantly improved the removal rate in the subsequent UBAF process. The ICME system removed 31% of trichloromethane(TCM) precursors and 20% of dichloroacetonitrile(DCAN) precursors. The results of measurements of the molecular weight distribution and hydrophilic fractions of DOM and DBP precursors showed that ICME pretreatment played a key role in breaking large-molecular-weight organic matter into low-molecular-weight components, and the hydrophobic fraction into hydrophilic compounds, which was favorable for subsequent biodegradation by UBAF.Three-dimensional fluorescence spectroscopy(3D-EEM) further indicated that the ICME system improved the removal of TCM and DCAN precursors. The biomass analysis indicated the presence of a larger and more diverse microbial community in the ICME-UBAF system than for the UBAF alone. The high-throughput sequencing results revealed that domination of the genera Sphingomonas, Brevundimonas and Sphingorhabdus contributed to the better removal of organic matter and two types of DBP precursors. Also, Nitrosomonas and Pseudomonas were beneficial for ammonia removal.
|
Enhanced removal of organic matter and typical disinfection byproduct precursors in combined iron-carbon micro electrolysis-UBAF process for drinking water pre-treatment |
| |
| Yinghan Chen,Tao Lin,Wei Chen.Enhanced removal of organic matter and typical disinfection byproduct precursors in combined iron-carbon micro electrolysis-UBAF process for drinking water pre-treatment[J].Journal of Environmental Sciences,2019,31(4):315-37. |
| |
| Authors: | Yinghan Chen Tao Lin and Wei Chen |
| |
| Institution: | Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China;College of Environment, Hohai University, Nanjing 210098, China,Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China;College of Environment, Hohai University, Nanjing 210098, China and Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China;College of Environment, Hohai University, Nanjing 210098, China |
| |
| Abstract: | |
| |
| Keywords: | Drinking water pre-treatment Micro-electrolysis Up-flow biological aerated filter Organic matter Disinfection by-product precursors |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
