Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 282, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2021.120085
Keywords
Fluidized granular activated carbon; Powdered activated carbon; Ultrafiltration; Membrane fouling mitigation; Water treatment
Categories
Funding
- National Key Research and Development Program of China [2021YFC2102203]
- National Natural Science Foundation of China [22008009]
- Beijing Institute of Technology Research Fund Program for Young Scholars
Ask authors/readers for more resources
This study proposes a method that combines fluidized granular activated carbon (GAC) and PAC with the UF process to improve water treatment efficiency. The results show that fluidized GAC particles effectively remove PAC deposition and fouling. PAC improves the effluent quality by adsorbing humic acid-like substances, and the energy consumption of GAC fluidization is lower compared to conventional fouling control methods in UF. This integrated GAC-PAC-UF process is technically feasible and economically viable, potentially achieving high permeate quality and reducing membrane fouling.
Ultrafiltration (UF) has been extensively employed in current water treatment practice, during which limited removal for soluble contaminants and membrane fouling remain two perennial hurdles to efficient operation. This study proposed a promising approach by simultaneous coupling of fluidized granular activated carbon (GAC) and PAC with UF process, whereby PAC was responsible for improving effluent quality, and fluidized GAC was targeted for mitigating UF fouling and PAC deposition. The operational performance of such integrated GAC-PAC-UF system was systemically evaluated in a lab-scale setup. The results showed that fluidized GAC particles with larger size appeared highly effective in removing PAC deposition and fouling formed by surface water. PAC addition improved the effluent quality mainly by adsorbing humic acid-like substances. More importantly, en-ergy consumption by GAC fluidization was found to be at least an order-of-magnitude lower than conventional fouling control methods employed in UF. Furthermore, redundancy analysis revealed that the key mechanism for UF fouling mitigation was tied to GAC particle momentum, whereas inorganic fouling mitigation was mostly achieved by GAC-induced liquid turbulence. It is expected that such integrated GAC-PAC-UF process proposed should be technically feasible and economically viable, potentially achieving high permeate quality and reducing membrane fouling with limited energy requirement.
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