Purge Procedures and Leak Testing for the Morgan Breathing System (MBS) 2000 Closed-Circuit Oxygen Rebreather

2005 ◽  
Author(s):  
David Fothergill
Keyword(s):  
Closed Circuit ◽  
Breathing System ◽  
Leak Testing

A Cause of Breathing System Leak during Closed Circuit Anesthesia

1986 ◽  
Vol 65 (6) ◽  
pp. 661-663 ◽  
Author(s):  
Philip J. Ferderbar ◽  
Robert E. Kettler ◽  
James Jablonski ◽  
Richard Sportiello
Keyword(s):  
Closed Circuit ◽  
Breathing System ◽  
Closed Circuit Anesthesia

scholarly journals A novel ambulatory closed circuit breathing system for use during exercise

Anaesthesia ◽  
2011 ◽  
Vol 66 (5) ◽  
pp. 348-353 ◽  
Author(s):  
R. C. N. McMorrow ◽  
J. S. Windsor ◽  
M. G. Mythen ◽  
M. P. W. Grocott ◽  
Keyword(s):  
Closed Circuit ◽  
Breathing System

Scaling risk assessment in a closed circuit recycled board mill by speciation methods

TAPPI Journal ◽  
2012 ◽  
Vol 11 (5) ◽  
pp. 53-61 ◽  
Author(s):  
PATRICK HUBER ◽  
SYLVIE NIVELON ◽  
PATRICE NORTIER
Keyword(s):  
Calcium Carbonate ◽  
Volatile Fatty Acids ◽  
Inorganic Carbon ◽  
Stability Index ◽  
Closed Circuit ◽  
Critical Problem ◽  
Local Scaling ◽  
Water Analyses ◽  
Closed Water ◽  
Speciation Calculation

Calcium carbonate scaling often is a critical problem for recycled board mills that have closed water circuits. The objective of this study was to determine local scaling risks throughout the production process. To predict scaling potential, we calculated several saturation indexes, based on speciation determined from detailed water analyses. Calculated scaling trends are in accordance with observed dissolution and precipitation of calcium carbonate in the process, when considering local aeration phenomena. The importance of volatile fatty acids (resulting from anaerobic bacterial activity) in calco-carbonic equilibriums is discussed, and taken into account in the speciation calculation. We also demonstrate the need to measure inorganic carbon instead of alkalinity in such conditions. This makes typical scaling indexes, such as the Ryznar Stability Index, irrelevant to predict scaling risk in closed circuit conditions; thus, it is necessary to use general speciation methods, as described in this paper.

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