Application of Models in Developing Control Strategies for Activated Sludge Waste Water Treatment Plants

1984 ◽  
Vol 16 (5-7) ◽  
pp. 587-594 ◽  
Author(s):  
A Holmberg ◽  
J Forsström
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Activated Sludge ◽  
Control Strategies ◽  
Waste Water Treatment ◽  
Control Algorithms ◽  
Flow Rates ◽  
Simulation Techniques ◽  
Water Treatment Plants ◽  
Sludge Waste

This paper studies control of activated sludge plants using recycle and wastage flow rates as control variables. The behaviour of the control algorithms was studied using simulation techniques. The results indicate that the process is not sensitive to the recycle flow rate. Wastage flow control with the objective to keep the sludge concentration constant turned out to be promising.

scholarly journals Comparison of bioindicator eukaryotes of activated sludge biocenoses on two water-treatment plants: a case study

2017 ◽  
Vol 16 (1) ◽  
pp. 54-60 ◽  
Author(s):  
Farida Y. Achmadulina ◽  
Rustem K. Zakirov ◽  
Elena S. Balymova ◽  
Vera Denisova ◽  
Taťjána Brovdyová ◽  
...  
Keyword(s):  
Waste Water ◽  
Chemical Composition ◽  
Water Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
High Water ◽  
Water Treatment Plants ◽  
The City ◽  
Main Factor

Abstract Activated sludge biocenoses were compared on waste-water treatment plants in the city of Kazan, Russian Federation and the city of Teplice, Czech Republic. Based on Palia-Kovnatski index, Acanthamoeba in Kazan, Epistylis in Teplice, and Acanthamoeba and Centropyxis were dominant genera in both plants. The major subdominant generas identified were Arcella, Opercularia and Aspidisca. This indicates high nitrification ability, high water purification potential and matured activated sludge. Chemical composition of the waste-water was identified as the main factor determining the sludge biocenoses diversity. Higher sludge biodiversity (Shannon, Margalef, and Sorensen indexes) was found in Kazan corresponding to more concentrated inflow water.

Quainification and Characterisation of Nitrosomonas and Nitrobacter Using Monoclonal Antibodies

1994 ◽  
Vol 29 (7) ◽  
pp. 1-6 ◽  
Author(s):  
B. Sandén ◽  
C. Grunditz ◽  
Y. Hansson ◽  
G. Dalhammar
Keyword(s):  
Waste Water ◽  
Monoclonal Antibodies ◽  
Water Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Enzyme Linked Immunosorbent Assay ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
Activity Measurements ◽  
Pure Cultures

Nitrobacter and Nitrosomonas were isolated in pure cultures from two large waste water treatment plants in the Stockholm area. Using the hybridoma technique, monoclonal antibodies were produced specific for Nitrobacter and Nitrosomonas respectively. Using a competitive ELISA (enzyme linked immunosorbent assay) we can estimate cell numbers in pure cultures of the bacteria as well as in activated sludge. The antibody directed against Nitrobacter was tested with sludge from several waste water treatment plants in the Stockholm area and is able to recognise Nitrobacter, indicating a common epitope. There is a good correlation between activity measurements and cell number estimations in activated sludge indicating that we have the necessary tools to further develop a method for the quick and reliable detection and quantification of Nitrobacter and Nitrosomonas.

Intensification of Activated Sludge Waste Water Treatment

1986 ◽  
Vol 18 (7-8) ◽  
pp. 307-311 ◽  
Author(s):  
A. Donáth-Jobbágy ◽  
J. Káimán ◽  
R. Hajós
Keyword(s):  
Waste Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Settling Tank ◽  
Pure Oxygen ◽  
Pollution Level ◽  
Reactor Volume ◽  
Sludge Waste

The efficiency of two possible intensification methods of activated sludge waste water treatment (pure oxygen activation and activated carbon addition) were compared. Experiments were carried out in laboratory scale equipment with variable reactor volume (maximum capacity 20,0 dm3, settling tank vol. 15 dm3). In order to detect even minor differences, we operated completely identical units in parallel runs, with one representing a traditional system as reference. A model sewage of industrial character, diluted milk, was used as influent and in the course of activated carbon intensification experiments an anion-active detergent was added as a poorly biodegradable model material to be removed mainly by adsorption. Reactor loads were gradually increased - from low values to overloading - by decreasing the dilution of milk or by reducing reactor volume. The effects of different intensification methods on the effluent pollution level (COD value and anion-active detergent content) and on the settling properties of sludge were examined as a function of loading. The efficiency of both intensification methods was found to be increasing with increasing loading. Comparison of the two systems showed activated carbon intensification to be more efficient in the removal of soluble COD and extremely useful in the elimination of a poorly biodegradable material.

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