Better understanding of the activated sludge process combining fluorescence-based methods and flow cytometry: A case study

2020 ◽  
Vol 90 ◽  
pp. 51-58 ◽  
Author(s):  
Vanesa Benito ◽  
Javier Etxebarria ◽  
Felipe Goñi-de-Cerio ◽  
Iñigo Gonzalez ◽  
Pilar Brettes ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Activated Sludge ◽  
Activated Sludge Process

Sewage-treatment under substantial load variations in winter tourism areas – a full case study

2004 ◽  
Vol 50 (7) ◽  
pp. 147-155 ◽  
Author(s):  
S. Winkler ◽  
N. Natsché ◽  
T. Gamperer ◽  
M. Dum
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Sewage Treatment ◽  
Activated Sludge Process ◽  
Two Stage ◽  
Winter Tourism ◽  
Load Variations ◽  
Sudden Load

The sewage-load variations in winter tourism areas are characterized by sudden increases - in the ange of a factor two to three - within only a few days at the start and the end of the tourist season, especially at Christmas. The sudden load increases occur during periods of low wastewater temperatures, which is an additional demanding factor with respect to nitrogen removal. A full case study was carried out at WWTP Saalfelden, which is located near one of Austria's largest skiing resorts. The plant is designed for 80,000 PE and built according to the HYBRID®-concept, which is a special two stage activated sludge process for extensive nutrient removal.

Systematic analysis of the operational response of activated sludge process to variable wastewater flows. A case study

2002 ◽  
Vol 4 (3) ◽  
pp. 183-190 ◽  
Author(s):  
D. Giokas ◽  
A. Vlessidis ◽  
M. Angelidis ◽  
G. Tsimarakis ◽  
M. Karayannis
Keyword(s):  
Activated Sludge ◽  
Activated Sludge Process ◽  
Systematic Analysis

Stochastic Control of the Activated Sludge Process

1991 ◽  
Vol 24 (6) ◽  
pp. 249-255 ◽  
Author(s):  
John C. Kabouris ◽  
Aris P. Georgakakos
Keyword(s):  
Optimal Control ◽  
Activated Sludge ◽  
Time Management ◽  
Stochastic Optimal Control ◽  
Process Model ◽  
Control Method ◽  
Activated Sludge Process ◽  
Hypothetical Case ◽  
Optimal Control Method

A stochastic optimal control method is introduced and applied to the real-time management of an activated sludge process. The method includes a detailed dynamic process model and accounts for input uncertainty. The objective is to minimize the expected variations of effluent organic concentrations and is met by manipulating process flowrates. The method is applied to a hypothetical case study.

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