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Study on the Influence of Selected Technological Parameters of a Rotating Biological Contactor on the Degree of Liquid Aeration

100%

Szulżyk-Cieplak J. , Tarnogórska A. , Lenik Z.

Journal of Ecological Engineering

2018

tom Vol. 19, nr 6

247--253

The subject of the research involves a rotating biological contractor with a bi-directional longitudinal flow as an element of a synchronized system of disposal and biological treatment of domestic wastewater in small-bore sewerage. The rotor design is based on a system of corrugated protective pipes, arranged in coils wound around its rotation axis. The pipes are wound in a way that enables a bi-directional flow of liquids. During the rotor rotation in wastewater, the contactor is simultaneously emptied and filled with wastewater. The role of corrugated protective pipes is twofold; on the one hand, they constitute a surface for the biofilm development and on the other, they enable the flow of liquids, thus ensuring its aeration. The contactor design aims to achieve intensive aeration of transported wastewater, which will allow for greater development of microorganism populations participating in hybrid wastewater treatment, i.e. the methods involving activated sludge and trickling filter. An analysis on the influence of rotor operation kinematics on the efficiency of liquid aeration was conducted. The aeration capacity for variable rotational speed (0.7 rpm, 1.5 rpm, 2.0 rpm, 3.0 rpm) and direction of the contactor rotating element were calculated. In the considered case, oxygen transfer coefficient KLa was within the range of 0.011÷0.023 1/min. The obtained results indicate a clear connection between the system kinematics and the degree of liquid aeration in the contactor.

Napowietrzanie cieczy w bioreaktorze dyskowym

75%

Głuszcz P. , Jamroz T. , Sencio B.

Inżynieria i Aparatura Chemiczna

2005

tom Nr 4s

18-19

Process of oxygen transfer in a laboratory rotating-disc bioreactor was investigated. A dependence of the method of liquid aeration, air flow rate, rotary speed of discs and the level of liquid (i.e. air exposed area of discs) on kia was determined. Experimental results were compared with literature data and used for Verification of the applicability of two models of oxygen transfer in rotating biological contactors.

Współczynnik wnikania tlenu w reaktorze air-lift o przekroju prostokątnym

75%

Budzyński P. , Dziubiński M. , Orczykowska M.

Inżynieria i Aparatura Chemiczna

2005

tom Nr 4s

11-12

Experimental investigations of oxygen transfer in a pilot-plant scale rectangular air-lift column were carried out. Correlation equations describing these values have been proposed on the basis of a broad range of experimental data.