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Title: Osmotically assisted reverse osmosis for high salinity brine treatment

Abstract

Here, this work evaluates a novel osmotically assisted reverse osmosis (OARO) process for dewatering high salinity brines using readily available membranes and equipment. While traditional reverse osmosis processes are limited to treating brines with osmotic pressures below the membrane burst pressure, in OARO, the osmotic pressure difference across a membrane is reduced with a permeate side saline sweep. A series of OARO stages can be used to sequentially reduce the concentration of the feed until a traditional RO process can obtain fully desalinated water. This paper develops an OARO model to identify feasible operating conditions for this process and to estimate the water recovery and energy consumption across a range of brine feed concentrations. For a feed of 100–140 g/L sodium chloride, we estimate that the OARO process is capable of a 35–50% water recovery with an energy consumption of 6–19 kWh per m 3 of product water. Finally, the results suggest that an OARO dewatering process improves upon the recovery of reverse osmosis for high salinity brines and has a comparable or lower energy consumption than mechanical vapor compression.

Authors:
 [1]; ORCiD logo [2];  [3];  [3];  [4]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States). Department of Civil and Environmental Engineering; National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
  2. Carnegie Mellon Univ., Pittsburgh, PA (United States). Department of Civil and Environmental Engineering
  3. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
  4. Carnegie Mellon Univ., Pittsburgh, PA (United States). Department of Civil and Environmental Engineering and Department of Engineering and Public Policy
Publication Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1479651
Alternate Identifier(s):
OSTI ID: 1550527
Grant/Contract Number:  
CBET-1554117; CBET-1215845
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Desalination
Additional Journal Information:
Journal Volume: 421; Journal Issue: C; Journal ID: ISSN 0011-9164
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Bartholomew, Timothy V., Mey, Laura, Arena, Jason T., Siefert, Nicholas S., and Mauter, Meagan S. Osmotically assisted reverse osmosis for high salinity brine treatment. United States: N. p., 2017. Web. doi:10.1016/j.desal.2017.04.012.
Bartholomew, Timothy V., Mey, Laura, Arena, Jason T., Siefert, Nicholas S., & Mauter, Meagan S. Osmotically assisted reverse osmosis for high salinity brine treatment. United States. doi:10.1016/j.desal.2017.04.012.
Bartholomew, Timothy V., Mey, Laura, Arena, Jason T., Siefert, Nicholas S., and Mauter, Meagan S. Sat . "Osmotically assisted reverse osmosis for high salinity brine treatment". United States. doi:10.1016/j.desal.2017.04.012. https://www.osti.gov/servlets/purl/1479651.
@article{osti_1479651,
title = {Osmotically assisted reverse osmosis for high salinity brine treatment},
author = {Bartholomew, Timothy V. and Mey, Laura and Arena, Jason T. and Siefert, Nicholas S. and Mauter, Meagan S.},
abstractNote = {Here, this work evaluates a novel osmotically assisted reverse osmosis (OARO) process for dewatering high salinity brines using readily available membranes and equipment. While traditional reverse osmosis processes are limited to treating brines with osmotic pressures below the membrane burst pressure, in OARO, the osmotic pressure difference across a membrane is reduced with a permeate side saline sweep. A series of OARO stages can be used to sequentially reduce the concentration of the feed until a traditional RO process can obtain fully desalinated water. This paper develops an OARO model to identify feasible operating conditions for this process and to estimate the water recovery and energy consumption across a range of brine feed concentrations. For a feed of 100–140 g/L sodium chloride, we estimate that the OARO process is capable of a 35–50% water recovery with an energy consumption of 6–19 kWh per m3 of product water. Finally, the results suggest that an OARO dewatering process improves upon the recovery of reverse osmosis for high salinity brines and has a comparable or lower energy consumption than mechanical vapor compression.},
doi = {10.1016/j.desal.2017.04.012},
journal = {Desalination},
issn = {0011-9164},
number = C,
volume = 421,
place = {United States},
year = {2017},
month = {4}
}

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Cited by: 18 works
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