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Pathways for minimal and zero liquid discharge with enhanced reverse osmosis technologies: Module-scale modeling and techno-economic assessment

Journal Article · · Desalination
 [1];  [2];  [2]
  1. Columbia University, New York, NY (United States); Columbia University
  2. Columbia University, New York, NY (United States)
While mechanical vapor compression is typically applied for the concentration of brine, new approaches that are less costly and less energy intensive are needed to facilitate minimal and zero liquid discharge. Several variations of reverse osmosis for high-salinity desalination and increasing recovery rates beyond the pressure limitation of conventional RO have been proposed in the literature. Furthermore, the promise of these enhanced RO approaches entails a reduction in energy consumption when compared with thermal desalination methods. In this paper, low-salt rejection reverse osmosis (LSRRO), cascading osmotically assisted reverse osmosis (COMRO), and osmotically assisted reverse osmosis (OARO) were comparatively assessed via module-scale, cost optimization models to gain an accurate perspective of the performance differences between each of these configurations. We quantified the optimal levelized cost of water (LCOW) of each technology for the case of desalinating feedwater at 70 g/L at 75% recovery, which would result in a brine concentration near 250 g/L, a level that allows further treatment with crystallizers. For baseline scenarios, LCOW results for LSRRO, COMRO, and OARO were 6.63, 7.90, and 5.14 $/m3 of product water, respectively, while the corresponding specific energy consumption (SEC) values were 28.9, 12.8, and 10.3 kWh/m3. A sensitivity analysis is also presented.
Research Organization:
Columbia University, New York, NY (United States)
Sponsoring Organization:
National Science Foundation Graduate Research Fellowship; USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
Grant/Contract Number:
EE0008401
OSTI ID:
2309761
Alternate ID(s):
OSTI ID: 1815145
OSTI ID: 1848773
Journal Information:
Desalination, Journal Name: Desalination Vol. 509; ISSN 0011-9164
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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