Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 792, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.148291
Keywords
Disk tube reverse osmosis; Leachate; Flue gas desulfurization wastewater; Economic evaluation
Categories
Funding
- National Natural Science Foundation of China [52000114]
- Key Program of the National Natural Science Foundation of China [51738005]
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China has been a major contributor to investigations on disk tube reverse osmosis (DTRO), with a cumulative reported DTRO application scale in wastewater treatment of around 16,500 m³/d by 2020. Highest reported frequencies were for leachate and flue gas desulfurization (FGD) wastewater. DTRO has shown promising prospects for wastewater treatment, with high removal rates for pollutants and manageable operating costs.
Disk tube reverse osmosis (DTRO), a modified module RO, has received growing attention in wastewater treatment. However, there is no comprehensive review of DTRO applications for wastewater treatment. In this study, China was found to be a major contributor to DTRO investigations. Specifically, 46 full- and 17 pilot-scale DTRO applications in China from the literature are summarized. The cumulative reported DTRO application scale in wastewater treatment amounted to similar to 16,500 m(3)/d by 2020 in China. Leachate and flue gas desulfurization (FGD) wastewater had the highest reported frequencies. Two-stage DTRO and biological treatment + DTRO/two-stage DTRO were the most reported processes in leachate treatment. Chemical oxygen demand (COD) and NH4+-N were removed at 99.00-99.95% and 98.00-99.98%, respectively, in full scales in leachate treatment. DTRO was primarily utilized in the concentration unit in hypersaline wastewater treatment (e.g., FGD wastewater). Total dissolved solids (TDS) were removed at 94.69-96.87% and 85.95-96.5% in the full- and pilot-scales, respectively. The overall operating costs were 17.50-60.61 CNY/m(3) and 0.69-8.75 CNY/kgCOD for leachate treatment and 26.94-52.28 CNY/m(3) and 0.71-3.61 CNY/kgTDS for FGD wastewater treatment. The major components of operating costs were chemical costs (13.09 CNY/m(3), 1.63 CNY/kgCOD) for two-stage DTRO and electricity costs (19.73 CNY/m(3), 1.67 CNY/kgCOD) for the biological treatment + DTRO/two-stage DTRO process. DTRO has shown promising prospects for wastewater treatment. (C) 2021 Elsevier B.V. All rights reserved.
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