A critical review and experimental verification of the correct use of the dynamic method for the determination of oxygen transfer in aerated agitated vessels to water, electrolyte solutions and viscous liquids

Individual kinetic parameters such as BOD, biodegradation of wastewater, reaction time, maximal substrate rate can be determined by respirometry. For the determination of main respirometric parameters (STBOD, BODr, reaction time, etc.) overall oxygen transfer coefficient, KLa, is needed. This parameter can be determined with dynamic method in an open respirometer at limited conditions (constant temperature, constant stirring conditions). It was found out that KLa is dependent upon concentration of the activated sludge; it can be determined with about 2% of relative standard deviation. The objective of our research work was determination of maximal exogenous oxygen uptake, re max and maximal substrate utilisation, µmax, which is very important kinetic parameter at wastewater treatment. These parameters show us the maximal substrate (wastewater) utilisation for appointed activated sludge.

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Method for the determination of oxygen transfer coefficients (KLa) with the correction for the actual cultivation conditions

Journal of Biochemical Toxicology ◽

10.1002/jbt.2570270123 ◽

1977 ◽

Vol 27 (1) ◽

pp. 155-164

Author(s):

Jan Páca ◽

Vratislav Grégr

Keyword(s):

Oxygen Transfer ◽

Transfer Coefficients ◽

Cultivation Conditions

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Review of species of the Stachys section Satureoides (Lamiaceae)

Novitates Systematicae Plantarum Vascularium ◽

10.31111/novitates/2018.49.125 ◽

2018 ◽

pp. 125-129

Author(s):

T. V. Krestovskaya

Keyword(s):

Geographical Distribution ◽

Critical Review ◽

Corolla Tube ◽

Infraspecific Taxa

On the base of a critical review of the material kept in the most of main European and some Asian Herbaria, a synopsis of the genus Stachys L. section Satureoides R. Bhattacharjee is given. The description of the section is enlarged (calyx 5–10(15)-veined, upper floral leaves often with short spinescent tip, stamens slightly exserted from the corolla tube). The section is represented by 4 species distributed in Turkey, Syria, Iraq and Iran. The keys for determination of its species and infraspecific taxa are compiled. The data on main synonyms, ecology, geographical distribution and types are given. The lectotypes of S. satureioides Montbret et Aucher ex Benth., S. ramosissima Montbret et Aucher ex Benth., S. burgsdorffioides (Benth.) Boiss. and S. burgsdorffioides subsp. ladanoides Hand.-Mazz. are designated.

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Application of electrocatalysis of anodic oxygen-transfer reactions: development of a coulometric method for the determination of chemical oxygen demand

10.31274/rtd-180813-10434 ◽

1996 ◽

Author(s):

Kimbell Lee Pamplin

Keyword(s):

Chemical Oxygen Demand ◽

Oxygen Transfer ◽

Oxygen Demand ◽

Transfer Reactions ◽

Coulometric Method

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Selectivity coefficients of some simple and complex inorganic ions for Spheron DEAE

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19842349 ◽

1984 ◽

Vol 49 (10) ◽

pp. 2349-2354 ◽

Cited By ~ 2

Author(s):

František Vláčil ◽

Karel Koňák

Keyword(s):

Ion Exchange ◽

Mobile Phase ◽

Dynamic Method ◽

Precious Metals ◽

Inorganic Ions ◽

Chromatographic Determination ◽

Chloride Ions ◽

Chloro Complexes ◽

Selectivity Coefficients

The selectivity coefficients of the nitrate and chloride ions and of anionic chloro complexes of Au(III), Rh(III), Pd(II), and Pt(IV) for ion exchange on Spheron DEAE in the chloride form are determined by the dynamic method. the complex anion species formed are identified and the ion exchange nature of the sorption of precious metals on this sorbent is confirmed based on the elution order of the precious metals as determined previously by the column chromatography on Spheron DEAE using hydrochloric acid as the mobile phase. The effect of the presence of perchlorate in the mobile phase during the liquid chromatography of precious metals and during the chromatographic determination of nitrate traces is explained.

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Extra-Column Effects in Determination of Rate Parameters by the Chromatographic Method

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19960844 ◽

1996 ◽

Vol 61 (6) ◽

pp. 844-855 ◽

Cited By ~ 7

Author(s):

Olga Šolcová ◽

Petr Schneider

Keyword(s):

Chromatographic Method ◽

Dynamic Method ◽

Axial Dispersion ◽

Transport Parameters ◽

Porous Particles ◽

Loop Detector ◽

Single Pellet ◽

Set Up ◽

Extra Column Effects

It was shown that the sampling loop, detector and connecting elements in the chromatographic set-up for determination of transport parameters by the dynamic method significantly influence the response peaks from columns packed with porous or nonporous particles. A method, based on the use of convolution theorem, was developed which can take these effects into account. The applicability of this method was demonstrated on the case of axial dispersion in a single-pellet-string column (SPSR) packed with nonporous particles. It is possible to handle also responses from columns packed with porous particles by a similar procedure.

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