TU Darmstadt / ULB / TUbiblio

Design of aeration systems in activated sludge plants at different wastewater temperatures

Günkel-Lange, Tobias and Wagner, Martin (2012):
Design of aeration systems in activated sludge plants at different wastewater temperatures.
In: Water Practice and Technology, IWA Publishing, pp. wpt2012010, 7, (1), DOI: 10.2166/wpt.2012.010, [Article]

Abstract

The standard oxygen transfer rate (SOTR) is the decisive factor in the dimensioning of activated sludge plants. It depends on the required oxygen uptake rate (OUR) by microorganisms. The dependencies of the SOTR and OUR on the wastewater temperature (range 5–30 °C) are discussed. It is shown that the absolute values of the SOTR depend only slightly on the wastewater temperature, while the specific values, in relation to the aerated tank volume, increase considerably as a function of the wastewater temperature. Within this context, the decisive dimensioning temperature is discussed. In addition, two design approaches for determining the SOTR, temperature-dependant and temperature-independent, are presented and compared, showing the impact of the water dependency. Finally, the sensitivity of the decisive factors for determining the SOTR is discussed, particularly addressing the influence of the α-value.

Item Type: Article
Erschienen: 2012
Creators: Günkel-Lange, Tobias and Wagner, Martin
Title: Design of aeration systems in activated sludge plants at different wastewater temperatures
Language: English
Abstract:

The standard oxygen transfer rate (SOTR) is the decisive factor in the dimensioning of activated sludge plants. It depends on the required oxygen uptake rate (OUR) by microorganisms. The dependencies of the SOTR and OUR on the wastewater temperature (range 5–30 °C) are discussed. It is shown that the absolute values of the SOTR depend only slightly on the wastewater temperature, while the specific values, in relation to the aerated tank volume, increase considerably as a function of the wastewater temperature. Within this context, the decisive dimensioning temperature is discussed. In addition, two design approaches for determining the SOTR, temperature-dependant and temperature-independent, are presented and compared, showing the impact of the water dependency. Finally, the sensitivity of the decisive factors for determining the SOTR is discussed, particularly addressing the influence of the α-value.

Journal or Publication Title: Water Practice and Technology
Volume: 7
Number: 1
Publisher: IWA Publishing
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute IWAR
13 Department of Civil and Environmental Engineering Sciences > Institute IWAR > Wastewater Technology
13 Department of Civil and Environmental Engineering Sciences
Date Deposited: 13 Jul 2017 06:56
DOI: 10.2166/wpt.2012.010
Export:

Optionen (nur für Redakteure)

View Item View Item