Oxygen electrode response lag induced by liquid film resistance against oxygen transfer

1976 ◽  
Vol 18 (11) ◽  
pp. 1537-1555 ◽  
Author(s):  
V. Linek ◽  
V. Vacek
Keyword(s):  
Liquid Film ◽  
Oxygen Transfer ◽  
Oxygen Electrode ◽  
Film Resistance ◽  
Electrode Response

Oxygen supply without gas–liquid film resistance toXanthomonas campestris cultivation

1998 ◽  
Vol 59 (6) ◽  
pp. 714-723 ◽  
Author(s):  
G. Sriram ◽  
Y. Manjula Rao ◽  
K. Suresh ◽  
G. K. Sureshkumar
Keyword(s):  
Liquid Film ◽  
Oxygen Supply ◽  
Film Resistance

Studies on Oxygen Transfer Models

1982 ◽  
Vol 14 (1-2) ◽  
pp. 321-329 ◽  
Author(s):  
T Matsuo ◽  
K Hirayama
Keyword(s):  
Liquid Film ◽  
Oxygen Transfer ◽  
Dissipation Rate ◽  
Energy Dissipation Rate ◽  
The Other ◽  
Mean Square ◽  
Root Mean Square Velocity ◽  
Mass Transfer Mechanism ◽  
Water Surfaces ◽  
Film Coefficient

The liquid film coefficient of the oxygen transfer at air-water surfaces is dependent on turbulence characteristics of the flow. There are two methods for evaluating the liquid film coefficient with relation to turbulence; One is based on the root mean square velocity fluctuation and the larger scale movement and the other is based on the energy dissipation rate and the smaller scale movement. Conclusions obtained from some experimental and dimensional analyses imply that, for the mass transfer mechanism at the air-water surfaces, larger scale turbulent motion is dominated over smaller scale eddies represented by Kolmogoroff's micro-scale.

Effect of oxygen electrode response on K L a measurement

1989 ◽  
Vol 6 (4) ◽  
pp. 350-353
Author(s):  
Ho Nam Chang ◽  
Dong Jin Kim ◽  
Murray Moo-Young
Keyword(s):  
Oxygen Electrode ◽  
Electrode Response ◽  
Effect Of Oxygen

Research of Selective H2S Removal by Methyldiethanolamine Solutions in Experimental Simulation Apparatus

2013 ◽  
Vol 864-867 ◽  
pp. 1784-1788
Author(s):  
Hong Jian Xu ◽  
Hao Ran Li ◽  
Shu Fang Wang ◽  
Ji Zhao Jin ◽  
Wei Guo Pan ◽  
...  
Keyword(s):  
Liquid Film ◽  
Experimental Simulation ◽  
Co2 Absorption ◽  
Film Resistance ◽  
Total Resistance ◽  
H2s Removal ◽  
First Order ◽  
Removal Process ◽  
Experimental Apparatus ◽  
Pseudo First Order

In this research, an experimental apparatus that composed of adiabatic packed absorption and regeneration columns was established to simulate H2S removal process. The results show that the reaction between CO2 and MDEA can be regarded as a rapid pseudo-first-order reversible reaction and the CO2 absorption mainly is controlled by liquid film resistance while the reaction between H2S and MDEA are reversible instantaneous. For H2S absorption, it is mainly controlled by gas film resistance but the rate of liquid film resistance to the total resistance of H2S absorption was distributed from 25.7% (column bottom) to 12.6% (column up).

A biospecific membrane sensor for the determination of sucrose

1983 ◽  
Vol 48 (3) ◽  
pp. 798-804 ◽  
Author(s):  
Lumír Macholán ◽  
Hana Konečná
Keyword(s):  
Thin Film ◽  
Hydrogen Peroxide ◽  
Steady State ◽  
Reaction Layer ◽  
Enzyme Reaction ◽  
Oxygen Electrode ◽  
Reaction Vessel ◽  
Membrane Sensor ◽  
Electrode Response

The paper describes a rapid method for the biospecific determination of sucrose using an oxygen electrode of the Clark type or a platinum disc anode, the measuring part of which is coated by a thin film of invertase, mutarotase and glucose oxidase co-crosslinked by glutardialdehyde together with serum albumin. After injecting the sample into the reaction vessel the current corresponding to the decrease of the oxygen content or to the formation of hydrogen peroxide in the enzyme reaction layer is registered. The steady state electrode response is proportional to the concentration of sucrose within the range of 0.03 to 1.5 mmol . l-1 and is attained during 1-2 minutes with a reproducibility of 3-4%.

Improvement of oxygen transfer efficiency in aerated ponds using liquid-film-assisted approach

2007 ◽  
Vol 55 (11) ◽  
pp. 183-191 ◽  
Author(s):  
H. Zhu ◽  
T. Imai ◽  
K. Tani ◽  
M. Ukita ◽  
M. Sekine ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Liquid Film ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Oxygen Transfer ◽  
Structural Parameters ◽  
Volumetric Mass Transfer Coefficient ◽  
Aeration System ◽  
Film Forming ◽  
Oxygen Transfer Efficiency

In aerated ponds, oxygen is generally supplied through either diffused or mechanical aeration means. Surface transfer and bubble transfer both contribute significantly to oxygen transfer in a diffused aeration system. In the present study, a liquid-film-forming apparatus (LFFA) is successfully developed on a laboratory scale to improve considerably the surface transfer via the unique liquid film transfer technique. The experimental results show that the volumetric mass transfer coefficient for LFFA alone is found to be as much as 5.3 times higher than that for water surface and that the total volumetric mass transfer coefficient for the liquid film aeration system increases by 37% in comparison with a conventional aeration system. Additionally, by tuning finely the structural parameters of the LFFA, it can also lead to high dissolved oxygen (DO) water with the DO percent saturation greater than 90%. More importantly, this result is accomplished by simply offering a single-pass aeration at a depth as shallow as 26 cm. As a result, the objective of economical energy consumption in aerated ponds can be realized by lowering the aeration depth without sacrificing the aeration efficiency. It is noteworthy that the data presented in this study are acquired either numerically or experimentally.

Enhancement of Oxygen Transfer Efficiency in Diffused Aeration Systems using Liquid-Film-Forming Apparatus

2007 ◽  
Vol 28 (5) ◽  
pp. 511-519 ◽  
Author(s):  
H. Zhu ◽  
T. Imai ◽  
K. Tani ◽  
M. Ukita ◽  
M. Sekine ◽  
...  
Keyword(s):  
Liquid Film ◽  
Oxygen Transfer ◽  
Transfer Efficiency ◽  
Film Forming ◽  
Oxygen Transfer Efficiency
Sign in / Sign up

Export Citation Format

Share Document