Determination of Thermodynamic and Kinetic Parameters from Isothermal Heat Conduction Microcalorimetry: Applications to Long-Term-Reaction Studies

1995 ◽  
Vol 99 (18) ◽  
pp. 7108-7113 ◽  
Author(s):  
Richard J. Willson ◽  
Anthony E. Beezer ◽  
John C. Mitchell ◽  
Watson Loh
Keyword(s):  
Heat Conduction ◽  
Kinetic Parameters ◽  
Thermodynamic And Kinetic Parameters

Evaluation of WAS reduction efficiency using kinetic parameters in pilot-scale SBR operated with anaerobic sludge holding tank

2013 ◽  
Vol 67 (12) ◽  
pp. 2838-2844 ◽  
Author(s):  
Duck-Hyun Nam ◽  
Ki-Hoon Kang
Keyword(s):  
Kinetic Parameters ◽  
Retention Time ◽  
Ammonia Concentration ◽  
Pilot Scale ◽  
Biological Nutrient Removal ◽  
Anaerobic Sludge ◽  
Yield Coefficient ◽  
Initial Stage

By evaluating microbial kinetic parameters of a pilot sludge blanket reactor (SBR) plant operated with an anaerobic sludge holding tank (SHT), it was found that the sludge production was reduced by 63.5%. According to the theory of uncoupling metabolism, the microorganisms were induced to the initial stage of the endogenous phase in SHT, which resulted in the reduction of yield coefficient. For the determination of optimal retention time in SHT without causing a significant decay of microorganisms, ammonia concentration was monitored with time at specific temperature and mixed liquor suspended solids concentrations. In a long-term (>1 yr) operation of the pilot plant, no deterioration of the effluent water quality was observed. Considering phosphorus removal, an extended sludge retention time of 60–70 days (due to the reduced yield coefficient) did not significantly affect the efficiency relative to typical biological nutrient removal (BNR) processes. According to the findings of this study, anaerobic SHT can be applied for BNR processes with reduced production of sludge, and this will help to minimize environmental and economic problems pertaining to the final disposal of sludge.

A New Method of Analysis of Polarographic Waves

2003 ◽  
Vol 68 (6) ◽  
pp. 1055-1064 ◽  
Author(s):  
Juan Carlos Ruiz-Morales ◽  
Jesús César Rodríguez Placeres ◽  
Manuel Barrera Niebla ◽  
Mariana Cuesta Sánchez
Keyword(s):  
Computer Program ◽  
Kinetic Parameters ◽  
New Method ◽  
Great Precision ◽  
Electrode Processes ◽  
Wave Potential ◽  
Half Wave Potential ◽  
Half Wave ◽  
Thermodynamic And Kinetic Parameters

A method of analysis of polarographic waves of simple electrode processes is proposed. The quasi-reversible half-wave potential, Ec1/2, is involved in the determination of thermodynamic and kinetic parameters of electrode processes. This potential is determined very easily and with great precision. In order to facilitate the use of the method proposed, we have developed a computer program for Windows.

Photokinetische Untersuchungen an den photochromen Systemen der Dihydroindolizine

1984 ◽  
Vol 39 (7) ◽  
pp. 662-667 ◽  
Author(s):  
R. Bär ◽  
G. Gauglitz ◽  
R. Benz ◽  
J. Polster ◽  
P. Spang ◽  
...  
Keyword(s):  
Light Intensity ◽  
Differential Equations ◽  
Least Squares ◽  
Kinetic Parameters ◽  
Nonlinear Optimization ◽  
Thermal Reaction ◽  
Quantum Yields ◽  
System Of Differential Equations ◽  
Thermodynamic And Kinetic Parameters

The dependence of partial photochemical quantum yields on temperature and light intensity was examined with two dihydroindolizines. Some nonlinear optimization procedures and least squares methods are used to solve the system of differential equations. The distinct influence of the competitive thermal reaction can be demonstrated for both photochromic systems by determination of thermodynamic and kinetic parameters.

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