Evaluation of Millipore Cartridge-type Water Treatment Systems for Microbiological Applications

1979 ◽  
Vol 42 (8) ◽  
pp. 654-655 ◽  
Author(s):  
BARBARA L. GREEN ◽  
WARREN LITSKY
Keyword(s):  
Water Treatment ◽  
Produced Water ◽  
Tap Water ◽  
Ionic Species ◽  
Distilled Water ◽  
Microbiology Laboratory ◽  
Type Water ◽  
Control Water ◽  
Q System

Two different cartridge-type water treatment systems were evaluated for use in the microbiology laboratory, employing the Distilled Water Suitability Test (DWST). The Milli-Q system fed by distilled water and the Milli-R/Q system fed by tap water both produced water acceptable for microbiological use as measured by the DWST. Concentrations of ionic species (as measured by conductivity) in Milli-Q and Milli-R/Q products were significantly lower than in the double distilled control water.

THE EFFECTS OF VASOPRESSIN ON WATER UPTAKE OF THE TOAD, BUFO MARINUS, WHILE BATHED IN DIFFERENT HYPOTONIC SOLUTIONS

1957 ◽  
Vol 16 (2) ◽  
pp. 126-134 ◽  
Author(s):  
P. J. BENTLEY
Keyword(s):  
Sodium Chloride ◽  
Water Uptake ◽  
Tap Water ◽  
Bufo Marinus ◽  
Distilled Water ◽  
Three Solutions ◽  
Steady Decrease ◽  
Sodium Loss ◽  
Toad Bufo ◽  
Control Water

SUMMARY The uptake of water with and without vasopressin was measured in the intact toad, Bufo marinus. When injected with vasopressin, toads sitting in tap water showed a significantly greater response than those sitting in distilled water. NaCl solutions of increasing concentrations potentiated the uptake of water in response to vasopressin over part of the hypotonic range. If the NaCl level was kept constant and glucose used to increase the concentration, there was a steady decrease in response as the concentration was increased towards isotonicity with the animal's body fluids. Uptake of water in response to vasopressin was far greater in sodium chloride than in either lithium or potassium chloride of the same concentration. The control water uptake was similar in the three solutions. Large doses of vasopressin brought about an increase in sodium loss through the toad's skin. The theoretical implications of these results are discussed in relation to possible mechanisms involved in this uptake of water.

Application of three different water treatment technologies to shale gas produced water

2016 ◽  
Vol 20 (2) ◽  
pp. 104-110 ◽  
Author(s):  
Eunyoung Jang ◽  
Seongpil Jeong ◽  
Eunhyea Chung
Keyword(s):  
Water Treatment ◽  
Shale Gas ◽  
Produced Water ◽  
Treatment Technologies

Mass Transfer in Tubular Ceramic Membranes for Polluted Water Treatment - Numerical Simulation

2018 ◽  
Vol 20 ◽  
pp. 16-33 ◽  
Author(s):  
J. Saraiva de Souza ◽  
S. José dos Santos Filho ◽  
Severino Rodrigues de Farias Neto ◽  
A.G. Barbosa de Lima ◽  
H.A. Luma Fernandes Magalhães
Keyword(s):  
Mass Transfer ◽  
Water Treatment ◽  
Produced Water ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Numerical Results ◽  
Polluted Water ◽  
Separation Processes ◽  
Water Separation

Innovative technologies are needed to attend the increasingly strict requirements for produced water treatment, since most of the separation processes are limited to particles larger than 10 μm. Separation processes using ceramic membranes are attracting great interest from academic and industrial community. Nevertheless, few studies, especially numerical, regarding the inorganic membrane’s application for the polluted water separation have been reported. In the present work, therefore, a study of fluid-flow dynamics for a laminar regime in porous tubes (tubular porous ceramic membrane) has been performed. The mass, momentum and mass transport conservation equations were solved with the aid of a structured mesh using ANSYS CFX commercial package. The velocity of local permeation was determined using the resistance in series model. The specific resistance of the polarized layer was obtained by Carman-Kozeny equation. The numerical results were evaluated and compared with the results available in the literature, where by a good agreement with each other was found. The numerical results, obtained by the proposed shell and tubular membrane separation module, indicate that there is facilitation of mass transfer and hence a reduction in the thickness of the polarized boundary layer occurs.

scholarly journals Hydrophylicity Enhancement of Modified Cellulose Acetate Membrane to Improve the Membrane Performance in Produced Water Treatment

2018 ◽  
Vol 156 ◽  
pp. 08003 ◽  
Author(s):  
Tutuk Djoko Kusworo ◽  
Danny Soetrisnanto ◽  
Cynthia Santoso ◽  
Tyas Dwi Payanti ◽  
Dani Puji Utomo
Keyword(s):  
Water Treatment ◽  
Produced Water ◽  
Uv Light ◽  
Light Exposure ◽  
Membrane Surface ◽  
Asymmetric Structure ◽  
Dense Layer ◽  
Cellulose Acetate Membrane ◽  
Permeate Flux ◽  
Produced Water Treatment

Produced water is a wastewater generated from petroleum industry with high concentration of pollutants such as Total Dissolved Solid, Organic content, and Oil and grease. Membrane technology has been currently applied for produced water treatment due to its efficiency, compact, mild and clean process. The main problem of produced water using membrane is fouling on the membrane surface which causes on low permeate productivity. This paper is majority focused on the improvement of anti-fouling performance through several modifications to increase CA membrane hydrophilicity. The membrane was prepared by formulating the dope solution consists of 18 wt-% CA polymer, acetone, and PEG additive (3 wt-%, 5 wt-%, and 7 wt-%). The membranes are casted using NIPS method and being irradiated under UV light exposure. The SEM images show that parepared membrane has asymmetric structure consist of dense layer, intermediete layer, and finger-like support layer. The filtration test shows that PEG addition increase the membrane hydrophilicity and the permeate flux increases. UV light exposure on the membrane improves the membrane stability and hydrophilicity. The imrpovement of membrane anti-fouling performance is essential to achieve the higher productivity without lowering its pollutants rejection.

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