Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: oxygen mass transfer

Sortuj według:

Ogranicz wyniki do:

Measurement of air-water oxygen transfer of cylindrical vortex flow regulators at a recirculating system

Wójtowicz P., Szlachta M., Kotowski A.

Environment Protection Engineering

2013

Vol. 39, nr 3

207--215

Hydrodynamic flow regulators are used for diversion and/or limiting excess discharge in wastewater and stormwater systems as a replacement for traditional flow throttling devices. They are highly efficient, reliable and free from common disadvantages of traditional devices. Recent research of the authors indicated that atomization of a liquid by vortex flow regulators accelerates oxygenation and prevents the putrefaction process in wastewater and storm water collection systems. The study presents experimental results of the oxygen transfer measurements for basic designs of cylindrical hydrodynamic flow regulators in a closed-circuit experimental setup at the semi-commercial scale. The oxygen mass transfer coefficient, standard oxygen transfer rate and standard aeration efficiency were determined for the range of tested configurations by the clean water test.

Design and scale-up of airlift bioreactors

Jurascik M., Sikula I., Annus J., Markos J.

Inżynieria i Aparatura Chemiczna

2006

Nr 6s

96-98

In the presented paper the role of airlift bioreactor size and geometric design, and composition of fermentation broth on the liquid circulation velocity, gas hold-up and the oxygen mass transfer rate are investigated. Three laboratory internal loop airlift reactors (lALRs) with a different scale of total reactor volumes: 12, 40 and 200 litres were used. As a model system, transformation of glucose to gluconic acid using Aspergillus ni-ger strains was chosen. A comparison of hydrodynamic characteristics of lALRs with water - air system and three-phase real fermentation media was made.