scholarly journals Water Recovery from Advanced Water Purification Facility Reverse Osmosis Concentrate by Photobiological Treatment Followed by Secondary Reverse Osmosis

2018 ◽  
Vol 52 (15) ◽  
pp. 8588-8595 ◽  
Author(s):  
Keisuke Ikehata ◽  
Yuanyuan Zhao ◽  
Harshad V. Kulkarni ◽  
Yuan Li ◽  
Shane A. Snyder ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Water Purification ◽  
Water Recovery

scholarly journals Using Reverse Osmosis Membrane at High Temperature for Water Recovery and Regeneration from Thermo-Responsive Ionic Liquid-Based Draw Solution for Efficient Forward Osmosis

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 588
Author(s):  
Eiji Kamio ◽  
Hiroki Kurisu ◽  
Tomoki Takahashi ◽  
Atsushi Matsuoka ◽  
Tomohisa Yoshioka ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
High Temperature ◽  
Energy Saving ◽  
Osmotic Pressure ◽  
Reverse Osmosis ◽  
Forward Osmosis ◽  
Solution Temperature ◽  
Water Recovery ◽  
Temperature Dependent ◽  
Draw Solution

Forward osmosis (FO) membrane process is expected to realize energy-saving seawater desalination. To this end, energy-saving water recovery from a draw solution (DS) and effective DS regeneration are essential. Recently, thermo-responsive DSs have been developed to realize energy-saving water recovery and DS regeneration. We previously reported that high-temperature reverse osmosis (RO) treatment was effective in recovering water from a thermo-responsive ionic liquid (IL)-based DS. In this study, to confirm the advantages of the high-temperature RO operation, thermo-sensitive IL-based DS was treated by an RO membrane at temperatures higher than the lower critical solution temperature (LCST) of the DS. Tetrabutylammonium 2,4,6-trimethylbenznenesulfonate ([N4444][TMBS]) with an LCST of 58 °C was used as the DS. The high-temperature RO treatment was conducted at 60 °C above the LCST using the [N4444][TMBS]-based DS-lean phase after phase separation. Because the [N4444][TMBS]-based DS has a significantly temperature-dependent osmotic pressure, the DS-lean phase can be concentrated to an osmotic pressure higher than that of seawater at room temperature (20 °C). In addition, water can be effectively recovered from the DS-lean phase until the DS concentration increased to 40 wt%, and the final DS concentration reached 70 wt%. From the results, the advantages of RO treatment of the thermo-responsive DS at temperatures higher than the LCST were confirmed.

Performance of reverse osmosis (RO) for water recovery from permeates of membrane bio-reactor (MBR)

2013 ◽  
Vol 52 (4-6) ◽  
pp. 600-611 ◽  
Author(s):  
Santosh Raj Pandey ◽  
Veeriah Jegatheesan ◽  
Kanagaratnam Baskaran ◽  
Li Shu ◽  
Shobha Muthukumaran
Keyword(s):  
Reverse Osmosis ◽  
Water Recovery

Treatment of organized industrial zone wastewater by microfiltration/reverse osmosis membrane process for water recovery: From lab to pilot scale

2020 ◽  
Vol 38 ◽  
pp. 101646
Author(s):  
Bahar Ozbey-Unal ◽  
Philip Isaac Omwene ◽  
Meltem Yagcioglu ◽  
Çigdem Balcik-Canbolat ◽  
Ahmet Karagunduz ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Pilot Scale ◽  
Water Recovery ◽  
Reverse Osmosis Membrane ◽  
Membrane Process ◽  
Industrial Zone

Forward osmosis for the treatment of reverse osmosis concentrate from water reclamation: process performance and fouling control

2014 ◽  
Vol 69 (12) ◽  
pp. 2431-2437 ◽  
Author(s):  
C. Kazner ◽  
S. Jamil ◽  
S. Phuntsho ◽  
H. K. Shon ◽  
T. Wintgens ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Water Reuse ◽  
Membrane Filtration ◽  
Inorganic Compounds ◽  
Forward Osmosis ◽  
Building Blocks ◽  
Water Recovery ◽  
Liquid Discharge ◽  
Quality Water ◽  
A Minor

While high quality water reuse based on dual membrane filtration (membrane filtration or ultrafiltration, followed by reverse osmosis) is expected to be progressively applied, treatment and sustainable management of the produced reverse osmosis concentrate (ROC) are still important issues. Forward osmosis (FO) is a promising technology for maximising water recovery and further dewatering ROC so that zero liquid discharge is produced. Elevated concentrations of organic and inorganic compounds may act as potential foulants of the concentrate desalting system, in that they consist of, for example, FO and a subsequent crystallizer. The present study investigated conditions under which the FO system can serve as concentration phase with the focus on its fouling propensity using model foulants and real ROC. Bulk organics from ROC consisted mainly of humic acids (HA) and building blocks since wastewater-derived biopolymers were retained by membrane filtration or ultrafiltration. Organic fouling of the FO system by ROC-derived bulk organics was low. HA was only adsorbed moderately at about 7% of the initial concentration, causing a minor flux decline of about 2–4%. However, scaling was a major impediment to this process if not properly controlled, for instance by pH adjustment or softening.

Water purification of nitrates by low-pressure reverse osmosis method

2013 ◽  
Vol 35 (2) ◽  
pp. 71-75 ◽  
Author(s):  
V. V. Goncharuk ◽  
V. O. Osipenko ◽  
M. N. Balakina ◽  
D. D. Kucheruk
Keyword(s):  
Reverse Osmosis ◽  
Water Purification ◽  
Low Pressure
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