scholarly journals A Holistic Process Model for Evaluating Alternative Biosolids Technologies and Operational Methodologies to Improve Performance and Sustainable Decision-making at High Purity Oxygen Wastewater Treatment Plants

2018 ◽  
Author(s):  
Manuel E. Moncholi
Keyword(s):  
Decision Making ◽  
Wastewater Treatment ◽  
High Purity ◽  
Process Model ◽  
Wastewater Treatment Plants ◽  
Improve Performance ◽  
Holistic Process

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.

Anaerobic transformations of wastewater organic matter and sulfide production – investigations in a pilot plant pressure sewer

2002 ◽  
Vol 45 (3) ◽  
pp. 71-79 ◽  
Author(s):  
N. Tanaka ◽  
T. Hvitved-Jacobsen
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Pilot Plant ◽  
Process Model ◽  
Wastewater Treatment Plants ◽  
Model Simulation ◽  
Sulfur Cycle ◽  
Model Description ◽  
Model Parameters ◽  
Sulfide Production

Anaerobic transformations of wastewater organic matter and sulfide production rate were studied using a pilot plant pressure sewer (inner diameter: 102 mm, length: 47 m). Furthermore, a process model description including carbon and sulfur cycle was presented. Wastewater characterization based on oxygen utilization rate (OUR) measurement and VFA analysis was employed. Under anaerobic conditions, a net production of readily biodegradable substrate was observed, which fact is important for biological removal of nitrogen and phosphorus at subsequent wastewater treatment plants. Model parameters were determined on the basis of experimental findings. The model simulation of transformations of organic matter in sewers can be used as input to the model simulation and evaluation of the processes in wastewater treatment plants. The model is also useful to evaluate the problems in both sewers themselves and treatment plants caused by hydrogen sulfide.

Benchmarking plant operation and instrumentation, control and automation in the wastewater industry

2002 ◽  
Vol 2 (4) ◽  
pp. 163-171
Author(s):  
P. Ingildsen ◽  
P. Lant ◽  
G. Olsson
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Performance Indicators ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Key Performance Indicators ◽  
Dominant Factor ◽  
Improve Performance ◽  
Plant Operation ◽  
Volume Energy

Benchmarking is an effective tool to compare the performance of full-scale wastewater treatment plant operation. In this study, 29 wastewater treatment plants from eight countries were surveyed with the aim of developing some key performance indicators, which may be used for benchmarking purposes. The level of utilisation of instrumentation, control and automation (ICA) has also been measured. The study of ICA utilisation revealed that on average only 23% of all sensors are used for online control. For most parameters, ICA is not the single dominant factor determining performance, although it is the factor that has the highest potential to improve performance. Eighty percent of the participating plants had implemented new control during the last five years leading to improvements in nitrogen and phosphorous removal, energy efficiency and ease of operation. The survey has quantified how “non-standardised” wastewater treatment plant operational practice is. Some simple key performance indicators are derived that relate the level of removal of ammonium, total nitrogen, phosphorous and suspended solids to the resources needed for their removal, i.e. volume, energy, organic matter and precipitation chemicals. Several indicators are suggested for each substance. The indicators show a great difference from the best to the poorest performance indicating that improvement potentials exist at many plants.

scholarly journals Eco-Efficiency Assessment of Control Actions in Wastewater Treatment Plants

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 612
Author(s):  
Silvana Revollar ◽  
Montse Meneses ◽  
Ramón Vilanova ◽  
Pastora Vega ◽  
Mario Francisco
Keyword(s):  
Decision Making ◽  
Wastewater Treatment ◽  
Control Strategy ◽  
Energy Use ◽  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Seasonal Effects ◽  
Effect Of Temperature ◽  
Seasonal Effect ◽  
Control Actions

This work explores the possibilities of improving the eco-efficiency of Wastewater Treatment Plants (WWTPs) introducing a plant-wide perspective in the formulation of the control strategy. Eco-efficiency goals are contemplated in the analysis of the appropriateness of control actions, considering the seasonal effects of temperature into the decision-making process. Plant-wide control strategy handles are the operation variables of the activated sludge process, the volume of the primary clarifier, and the temperature of the anaerobic digester. Performance is evaluated in terms of energy use, biogas production, effluent quality, emissions to air and soil, considering annual and bimestrial average values of indicators to capture seasonal effect of temperature. The result is a set of possible solutions, obtained from a multi-objective decision-making procedure, consisting on a sequence of control actions applied at different temporal windows that improve the eco-efficiency indicators of the plant. The results obtained when applying the different solutions make evident how the application of plant-wide control strategies is useful to improve performance indicators that represent individual goals, leading to trade-off solutions that describe WWTPs’ eco-efficiency.

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

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