Concept development for the optimisation of the Hamburg Wastewater Treatment Plants

2000 ◽  
Vol 41 (9) ◽  
pp. 89-95 ◽  
Author(s):  
G. Ladiges ◽  
N-P. Bertram ◽  
R. Otterpohl
Keyword(s):  
Computer Simulation ◽  
Wastewater Treatment ◽  
Simulation Study ◽  
Storage Capacity ◽  
Wastewater Treatment Plants ◽  
Concept Development ◽  
Final Solution ◽  
Effluent Standards ◽  
Dynamic Computer Simulation ◽  
Traditional Manner

The Hamburger Stadtentwässerung (HSE) is planning to take on a further approximately 250,000 PE in addition to the 1.85 m PE already served by its combined wastewater treatment plants at Köhlbrandhöft/Dradenau. To cope with the increased load, a concept for the extension of the plants had to be developed. Various concepts were compared and evaluated using a dynamic computer simulation. The very wide-ranging simulation study showed that the required effluent standards can still be achieved after the volume of the sludge liquor storage capacity has been increased. As many concepts had been assessed in detail, the final solution chosen was considerably less expensive than if the wastewater treatment plants had been extended in a traditional manner.

OPTIMIZING OPERATION OF WASTEWATER TREATMENT PLANTS BY OFFLINE AND ONLINE COMPUTER SIMULATION

1994 ◽  
Vol 30 (2) ◽  
pp. 165-174 ◽  
Author(s):  
Ralf Otterpohl ◽  
Thomas Rolfs ◽  
Jörg Londong
Keyword(s):  
Computer Simulation ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Historical Analysis ◽  
Computer Work ◽  
Biological Phosphorus Removal ◽  
Wide Range

Computer simulation of activated sludge plant for nitrogen removal has become a reliable tool to predict the behaviour of the plant Models including biological phosphorus removal still require some practical experience but they should be available soon. This will offer an even wider range than today's work with nitrogen removal. One major benefit of computer simulation of wastewater treatment plants (WTP) is the optimization of operation. This can be done offline if hydrographs of a plant are collected and computer work is done with “historical” analysis. With online simulation the system is fed with hydrographs up to the actual time. Prognosis can be done from the moment of the computer work based on usual hydrographs. The work of the authors shows how accuratly a treatment plant can be described, when many parameters are measured and available as hydrographs. A very careful description of all details of the special plant is essential, requiring a flexible simulation tool. Based on the accurate simulation a wide range of operational decisions can be evaluated. It was possible to demonstrate that the overall efficiency in nitrogen removal and energy consumption of ml activated sludge plant can be improved.

Experiences with computer simulation at two large wastewater treatment plants in northern Poland

2002 ◽  
Vol 45 (6) ◽  
pp. 209-218 ◽  
Author(s):  
J. Makinia ◽  
M. Swinarski ◽  
E. Dobiegala
Keyword(s):  
Computer Simulation ◽  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Biological Nutrient Removal ◽  
Model Parameters ◽  
Total N ◽  
Northern Poland ◽  
Model Predictions ◽  
Steady State Simulation

Mathematical modelling and computer simulation have became a useful tool in evaluating the operation of wastewater treatment plants (WWTPs) in terms of nutrient removal capability. In this study, steady-state simulation results for two large biological nutrient removal WWTPs are presented. The plants are located in two neighbouring cities Gdansk and Gdynia in northern Poland. Simulations were performed using a pre-compiled model and layouts (MUCT and Johannesburg processes) implemented in the GPS-X simulation package. The monthly average values of conventional parameters, such as COD, Total Suspended Solids, total N, N-NH4+, P-PO4− were used as input data. The measured effluent concentrations of COD, N-NH4+, N-NO3− and P-PO4− as well as reactor MLSS were compared with model predictions. During calibration, performed from the process engineering perspective, default values of only five model parameters were changed. The opportunities for further applications of such models in municipal WWTPs are discussed.

A quantitative risk analysis tool for design/simulation of wastewater treatment plants

2002 ◽  
Vol 46 (4-5) ◽  
pp. 301-307 ◽  
Author(s):  
D. Bixio ◽  
G. Parmentier ◽  
D. Rousseau ◽  
F. Verdonck ◽  
J. Meirlaen ◽  
...  
Keyword(s):  
Decision Making ◽  
Wastewater Treatment ◽  
Capital Investment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Decision Making Process ◽  
Analysis Tool ◽  
Capital Investments ◽  
Effluent Standards ◽  
Order Of Magnitude

Uncertainty is a central concept in the decision-making process, especially when dealing with biological systems subject to large natural variations. In the design of activated sludge systems, a conventional approach in dealing with uncertainty is implicitly translating it into above-normal safety factors, which in some cases may even increase the capital investments by an order of magnitude. To obviate this problem, an alternative design approach explicitly incorporating uncertainty is herein proposed. A probabilistic Monte Carlo engine is coupled to deterministic wastewater treatment plant (WWTP) models. The paper provides a description of the approach and a demonstration of the general adequacy of the method. The procedure is examined in an upgrade of a conventional WWTP towards stricter effluent standards on nutrients. The results suggest that the procedure can support the decision-making process under uncertainty conditions and that it can enhance the likelihood of meeting effluent standards without entailing above-normal capital investments. The analysis led to reducing the capital investment by 43%, producing savings of more than 1.2 million euro.

Nitrification Inhibition - A Source Identification Method for Combined Municipal and/or Industrial Wastewater Treatment Plants

1992 ◽  
Vol 26 (5-6) ◽  
pp. 1135-1146 ◽  
Author(s):  
H. Kroiss ◽  
P. Schweighofer ◽  
W. Frey ◽  
N. Matsche
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Wastewater Treatment Plants ◽  
Ammonia Nitrogen ◽  
Nitrification Inhibition ◽  
Sewer System ◽  
Effluent Standards ◽  
Inhibition Of Nitrification ◽  
Short Time ◽  
The Relationship

Inhibition of nitrification at combined municipal and/or industrial treatment plants can cause serve problems in regard to the future low effluent standards for ammonia nitrogen. As inhibition problems often occur only for limited periods and are caused by different substances it is very difficult to find the sources of these substances within the sewer system. Using a two step strategy based on a respiration test it is possible to locate these sources within a short time and to concentrate then on the abatement of the inhibiting wastewaters. The method of the respiration test was developed and the relationship between dilution and inhibition could be described by a new mathematical inhibition model. The method was applied at an Austrian city (Linz) with more than 50% wastewater load coming from industry during the design period for the extension of the existing plant (800 000 PE).

Optimization of nutrient removal with on-line monitoring and dynamic simulation

1996 ◽  
Vol 33 (1) ◽  
pp. 203-209 ◽  
Author(s):  
E. J. Leeuw ◽  
J. F. Kramer ◽  
B. A. Bult ◽  
M. H. Wijcherson
Keyword(s):  
Wastewater Treatment ◽  
Ammonium Nitrate ◽  
Dynamic Simulation ◽  
Process Optimization ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Process Modelling ◽  
Effluent Quality ◽  
Effluent Standards ◽  
On Line

Many Wastewater Treatment Plants (WWTP) have to reach stricter effluent standards. WWTPs loaded with a low F/M-ratio can often reach these standards by process optimization, without extension of the plant. This paper presents the step by step approach of the process optimization. An important step is a three week period of on-line monitoring of ammonium, nitrate and phosphorus: the analyses provide information about changes of effluent quality within the day. Another important step is process modelling. The model is calibrated by the on-line measurements. Process modelling enables a comparison of the effectiveness of different process modifications. This approach is applied at a WWTP of the Friesland Waterboard.

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