Transport phenomena in reverse osmosis/nanofiltration membranes

2022 ◽  
pp. 49-90
Author(s):  
Serena Bandini ◽  
Cristiana Boi
Keyword(s):  
Reverse Osmosis ◽  
Transport Phenomena ◽  
Nanofiltration Membranes

Innovative concepts of regeneration of decolorization ion exchange resins in sugar refineries

2016 ◽  
pp. 377-380
Author(s):  
Marc André Théoleyre ◽  
Anne Gonin ◽  
Dominique Paillat
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Energy Supply ◽  
Ion Exchange Resins ◽  
Salt Solutions ◽  
Nanofiltration Membranes ◽  
Local Conditions ◽  
Salt Consumption ◽  
Multiple Effect ◽  
Exchange Resins

Regeneration of resins used for decolorization of sugar solutions is done with concentrated salt solutions. Nanofiltration membranes have been proven effective, in terms of industrial efficiency in decreasing salt consumption. More than 90% of the salt that is necessary for regeneration can be recycled through a combination of direct recycling of intermediate eluates, the separation of colored compounds by use of very selective nanofiltration membranes and a system to concentrate salty permeates. According to specific local conditions on energy supply and cost, the concentration of salty permeates can be either a multiple effect evaporator or a combination of electrodialysis and reverse osmosis. The desalted color compound solution is sent to the molasses, limiting considerably the effluent to be treated. Starting from a liquor of 800 IU, the water requirement is limited to less than 100 L/t of sugar and the amount of wastewater can be reduced to less than 40 L/t of sugar.

Experiences and new developments in biological pretreatment and physical post-treatment of landfill leachate

1996 ◽  
Vol 34 (7-8) ◽  
pp. 445-453 ◽  
Author(s):  
G. Baumgarten ◽  
C. F. Seyfried
Keyword(s):  
Reverse Osmosis ◽  
Treatment Plant ◽  
Post Treatment ◽  
Biological Pretreatment ◽  
Nanofiltration Membranes ◽  
Leachate Treatment ◽  
New Developments ◽  
Operational Costs ◽  
Treatment Stage ◽  
Operational Capacity

The leachate treatment plant of the landfill in Mechernich including biological pretreatment, reverse osmosis and evaporation and drying of the concentrate has been in operation since the beginning of 1994. Originally the plant was designed for a capacity of 130 m3/d. In the future, an average leachate amount of ca. 280 m3/d and even considerably higher montly peaks must be assumed. The necessary enlargement of the biological pretreatment will be realized by a second biological contactor plant. Corresponding to the operation of the existing plant a large amount of the ammonium can be eliminated under aerobic conditions by deammonification so no enlargement of the denitrification stage is needed. by simply replacing the reverse osmosis membranes by nanofiltration membranes, an operational capacity of ca. 280 m3/d may easily be achieved at the existing physical post-treatment stage. With the aid of this enlargement conception, the relatively high operational costs at present will be reduced considerably.

Bench-scale testing of surfactant-modified reverse osmosis/nanofiltration membranes

Desalination ◽  
1998 ◽  
Vol 115 (1) ◽  
pp. 15-32 ◽  
Author(s):  
Michelle Chapman Wilbert ◽  
John Pellegrino ◽  
Andrew Zydney
Keyword(s):  
Reverse Osmosis ◽  
Nanofiltration Membranes ◽  
Bench Scale

Measurement of water permeation kinetics across reverse osmosis and nanofiltration membranes: Apparatus development

2006 ◽  
Vol 270 (1-2) ◽  
pp. 187-195 ◽  
Author(s):  
Katie Benko ◽  
John Pellegrino ◽  
Larry W. Mason ◽  
Kevin Price
Keyword(s):  
Reverse Osmosis ◽  
Nanofiltration Membranes ◽  
Water Permeation ◽  
Permeation Kinetics

Comparison of reverse osmosis and nanofiltration membranes in the treatment of biologically treated textile effluent for water reuse

Desalination ◽  
2011 ◽  
Vol 281 ◽  
pp. 372-378 ◽  
Author(s):  
Meihong Liu ◽  
Zhenhua Lü ◽  
Zhihai Chen ◽  
Sanchuan Yu ◽  
Congjie Gao
Keyword(s):  
Reverse Osmosis ◽  
Water Reuse ◽  
Textile Effluent ◽  
Nanofiltration Membranes
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