Colloid–membrane interaction effects on flux decline during cross-flow ultrafiltration of colloidal silica on semi-ceramic membranes

2004 ◽  
Vol 6 (7) ◽  
pp. 1408-1412 ◽  
Author(s):  
P. Van der Meeren ◽  
H. Saveyn ◽  
S. Bogale Kassa ◽  
W. Doyen ◽  
R. Leysen
Keyword(s):  
Colloidal Silica ◽  
Cross Flow ◽  
Ceramic Membranes ◽  
Interaction Effects ◽  
Membrane Interaction ◽  
Flux Decline

Prothrombin-membrane interaction. Effects of ionic strength, pH, and temperature

Biochemistry ◽  
1980 ◽  
Vol 19 (13) ◽  
pp. 3028-3033 ◽  
Author(s):  
Robert M. Resnick ◽  
Gary L. Nelsestuen
Keyword(s):  
Ionic Strength ◽  
Interaction Effects ◽  
Membrane Interaction

scholarly journals A Review on Current Development of Membranes for Oil Removal from Wastewaters

Membranes ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 65 ◽  
Author(s):  
Brian Bolto ◽  
Jianhua Zhang ◽  
Xing Wu ◽  
Zongli Xie
Keyword(s):  
Ceramic Membrane ◽  
Ceramic Membranes ◽  
Current Situation ◽  
Polymeric Membranes ◽  
Operating Conditions ◽  
Oil Removal ◽  
Organic Polymers ◽  
Current Development ◽  
Flux Decline ◽  
Successful Approach

The current situation with the problems associated with the removal of oil from wastewaters by membranes is being explored. Many types of membranes have been investigated—organic polymers, inorganic or ceramic species and hybrids of the two. Polymeric membranes can be designed to facilitate the passage of oil, but the more successful approach is with hydrophilic types that encourage the passage of water. Ceramic membranes have an advantage here as they are less often irreversibly fouled and give a higher recovery of oil, with a lower flux decline. Furthermore, they can be cleaned up by a simple heating procedure. More attention should be given to understanding the mechanism of fouling so that operating conditions can be optimised to further reduce fouling and further decrease the flux decline, as well as assisting in the design of antifouling membranes. Another obstacle to ceramic membrane use is the high cost of manufacture. Cheaper starting materials such as clays have been surveyed.

Drinking water production by coagulation-microfiltration and adsorption-ultrafiltration

1998 ◽  
Vol 37 (10) ◽  
pp. 135-146 ◽  
Author(s):  
Akira Yuasa
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Hollow Fiber ◽  
Cross Flow ◽  
Ceramic Membranes ◽  
Cellulose Acetate Membrane ◽  
Water Recovery ◽  
Dead End ◽  
Iron Manganese ◽  
Gac Adsorption

Microfiltration (MF) and ultrafiltration (UF) pilot plants were operated to produce drinking water from surface water from 1992 to 1996. Microfiltration was combined with pre-coagulation by polyaluminium chloride and was operated in a dead-end mode using hollow fiber polypropylene and monolith type ceramic membranes. Ultrafiltration pilot was operated in both cross-flow and dead-end modes using hollow fiber cellulose acetate membrane and was combined occasionally with powdered activated carbon (PAC) and granular activated carbon (GAC) adsorption. Turbidity in the raw water varied in the range between 1 and 100 mg/L (as standard Kaolin) and was removed almost completely in all MF and UF pilot plants to less than 0.1 mg/L. MF and UF removed metals such as iron, manganese and aluminium well. The background organics in the river water measured as KMnO4 demand varied in the range between 3 and 16 mg/L. KMnO4 demand decreased to less than 2 mg/L and to less than 3 mg/L on the average by the coagulation-MF process and the sole UF process, respectively. Combination of PAC or GAC adsorption with UF resulted in an increased removal of the background organics and the trihalomethanes formation potential as well as the micropollutants such as pesticides. Filtration flux was controlled in the range between 1.5 and 2.5 m/day with the trans-membrane pressure less than 100 kPa in most cases for MF and UF. The average water recovery varied from 99 to 85%.

scholarly journals Innovative Optical-Sensing Technology for the Online Fouling Characterization of Silicon Carbide Membranes during the Treatment of Oily Water

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1161
Author(s):  
Mehrdad Ebrahimi ◽  
Axel A. Schmidt ◽  
Cagatay Kaplan ◽  
Oliver Schmitz ◽  
Peter Czermak
Keyword(s):  
Silicon Carbide ◽  
Oil Recovery ◽  
Oil And Gas ◽  
Produced Water ◽  
Cross Flow ◽  
Oil And Gas Industry ◽  
Ceramic Membranes ◽  
Transmembrane Pressure ◽  
Sensing Technology ◽  
Water Sensor

The oil and gas industry generates a large volume of contaminated water (produced water) which must be processed to recover oil before discharge. Here, we evaluated the performance and fouling behavior of commercial ceramic silicon carbide membranes in the treatment of oily wastewaters. In this context, microfiltration and ultrafiltration ceramic membranes were used for the separation of oil during the treatment of tank dewatering produced water and oily model solutions, respectively. We also tested a new online oil-in-water sensor (OMD-32) based on the principle of light scattering for the continuous measurement of oil concentrations in order to optimize the main filtration process parameters that determine membrane performance: the transmembrane pressure and cross-flow velocity. Using the OMD-32 sensor, the oil content of the feed, concentrate and permeate streams was measured continuously and fell within the range 0.0–200 parts per million (ppm) with a resolution of 1.0 ppm. The ceramic membranes achieved an oil-recovery efficiency of up to 98% with less than 1.0 ppm residual oil in the permeate stream, meeting environmental regulations for discharge in most areas.

scholarly journals Comparative study of the performance of three cross-flow ceramic membranes for water treatment

Water SA ◽  
2009 ◽  
Vol 33 (2) ◽  
Author(s):  
LV Cremades ◽  
E Rodríguez-Grau ◽  
R Mulero ◽  
JA Cusidó
Keyword(s):  
Water Treatment ◽  
Comparative Study ◽  
Cross Flow ◽  
Ceramic Membranes

Manufacture of ceramic membranes for application in demulsification process for cross-flow microfiltration

Desalination ◽  
2009 ◽  
Vol 245 (1-3) ◽  
pp. 527-532 ◽  
Author(s):  
Roberta Del Colle ◽  
Carlos A. Fortulan ◽  
Sérgio R. Fontes
Keyword(s):  
Cross Flow ◽  
Ceramic Membranes ◽  
Demulsification Process

Comparative Study on the Treatment of Biologically Treated Textile Effluent by Nanofiltration and Reverse Osmosis for Water Reuse

2012 ◽  
Vol 441 ◽  
pp. 584-588
Author(s):  
San Chuan Yu ◽  
Zhi Wen Chen ◽  
Mei Hong Liu ◽  
Jing Wei Zhao
Keyword(s):  
Reverse Osmosis ◽  
Water Reuse ◽  
Cross Flow ◽  
Water Shortage ◽  
Nanofiltration Membrane ◽  
Reverse Osmosis Membrane ◽  
Permeate Flux ◽  
Flux Decline ◽  
Salinity Reduction ◽  
Ro Membrane

In view of the water shortage, the increasingly severe regulations as well as the release thresholds, it is becoming increasingly necessary to reuse the textile effluents. This work concerned the treatment of textile plant effluent after conventional biological processing by membrane technology for water reuse. Desal5 DK nanofiltration (NF) membrane and BW30 reverse osmosis (RO) membrane were investigated in this study in terms of COD and color removal, salinity reduction as well as permeate flux through cross-flow permeation tests. The results showed that the Desal5 DK nanofiltration membrane exhibited higher stabilized water permeability and flux decline than the reverse osmosis membrane because of its higher porosity and tendency towards fouling. The BW30 reverse osmosis membrane reduced salinity to a great extent than the Desal5 DK nanofiltration membrane. While the nanofiltration membrane exhibited better COD removal efficiency compared to the RO membrane, possibly due to its sieving removal mechanism. The treated water with good enough quality could be recycled back into the process, thereby offering economical benefits by reducing the water consumption and wastewater treatment cost.

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