Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 303, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2022.122227
Keywords
Wastewater reuse; Dissolved effluent organic matter; Antibiotic resistance genes; Magnetic activated carbon; Ultrafiltration
Categories
Funding
- National Key R & D Program of China
- State Key Laboratory of Urban Water Resource and Environment at Harbin Insti- tute of Technology, China
- [2019YFD1100204-03]
- [2020DX05]
Ask authors/readers for more resources
In this study, magnetic activated carbon (MAC) was developed and used as a pre-treatment for ultrafiltration (UF) to simultaneously reduce dissolved effluent organic matter (dEfOM) and antibiotic resistance genes (ARGs). The hybrid process of MAC-UF showed superior removal efficiency compared to individual processes, reducing dEfOM by over 60% and achieving significant reduction of ARGs. Furthermore, MAC pretreatment significantly reduced membrane fouling, particularly irreversible hydraulic resistance. This new approach has important implications for reclaimed water security and UF technology promotion.
Antibiotic resistance genes (ARGs) and dissolved effluent organic matter (dEfOM) in reclaimed water are potential risks for landscape reuse or ecological water compensation. Adsorption process showed high advantage during advanced wastewater treatment. To improve the recovery of adsorbent during application, magnetic activated carbon (MAC) was successfully prepared by loading ferromagnetic oxide on powder activated carbon and used as pre-treatment for ultrafiltration (UF) to simultaneously reduce dEfOM and ARGs. Meanwhile, the mitigation mechanism of membrane fouling by MAC was further investigated. Results showed that the removal efficiency of dEfOM and ARGs by a hybrid process of MAC-UF was superior to the individual process. dEfOM reduction was more than 60%, and the maximum removal of sulI, sulII, sulIII, tetM, tetQ and tetW reached 3.09, 3.77, 1.96, 4.33, 3.85 and 2.75 log units, respectively. Their reduction was mainly attributed to the surface adsorption of MAC as well as physical retention by UF. Based on correlation analysis, the reduction of tetM, tetQ, tetW were strongly correlated with that of fulvic acids, soluble microbial products and humic acids (p < 0.01). Standard blocking and cake filtration were the dominant membrane fouling mechanisms throughout the filtration process. After MAC pretreatment, membrane fouling was significantly reduced, especially for the irreversible hydraulic resistance (88.9%). In a word, this study provided a new approach for dEfOM and ARGs reduction, and may have important significance for reclaimed water security and UF technology promotion.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available