wastewater modeling Articles
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A practitioner’s perspective on the uses and future developments for wastewater treatment modelling
The modern age of wastewater treatment modelling began with publication of the International Water Association (IWA) Activated Sludge Model (ASM) No.1 and has advanced significantly since. Models are schematic representations of systems that are useful for analysis to support decision-making. The most appropriate model for a particular application often incorporates only those components ...
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Optimizing the recovery of copper from electroplating rinse bath solution by hollow fiber membrane
This study aimed to recover and remove copper from industrial model wastewater solution by non-dispersive solvent extraction (NDSX). Two mathematical models were developed to simulate the performance of an integrated extraction–stripping process, based on the use of hollow fiber contactors using the response surface method. The models allow one to predict the time dependent efficiencies ...
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Modelling nitrite in wastewater treatment systems: A discussion of different modelling concepts
Abstract: Originally presented at the 1st IWA/WEF Wastewater Treatment Modelling Seminar (WWTmod 2008), this contribution has been updated to also include the valuable feedback that was received during the Modelling Seminar. This paper addresses a number of basic issues concerning the modelling of nitrite in key processes involved in biological wastewater water treatment. To this end, we review ...
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Modelling nitrite in wastewater treatment systems: A discussion of different modelling concepts
Abstract: Originally presented at the 1st IWA/WEF Wastewater Treatment Modelling Seminar (WWTmod 2008), this contribution has been updated to also include the valuable feedback that was received during the Modelling Seminar. This paper addresses a number of basic issues concerning the modelling of nitrite in key processes involved in biological wastewater water treatment. To this end, we review ...
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Anaerobic digestion: a new model for plant-wide wastewater treatment process modeling
Abstract: This paper describes a new anaerobic digestion model for wastewater treatment systems (MantisAD). The model has been developed specifically for plant-wide wastewater treatment modelling. That is, rather than modelling nitrogen as a series of fractions of other carbonaceous state variables, this new model includes six dedicated nitrogen state variables. This structure makes this new ...
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Exploring aeration-associated energy savings at a conventional water reclamation plant
Aeration accounts for a large fraction of energy consumption at conventional water reclamation plants (WRPs). Older plants were designed when control techniques were relatively primitive and energy consumption was less of a concern. As a result, although process operations at older WRPs can satisfy effluent permit requirements, they can operate with excess aeration. In this study, we ...
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Population balance models: a useful complementary modelling framework for future WWTP modelling
Population balance models (PBMs) represent a powerful modelling framework for the description of the dynamics of properties that are characterised by distributions. This distribution of properties under transient conditions has been demonstrated in many chemical engineering applications. Modelling efforts of several current and future unit processes in wastewater treatment plants could ...
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Analysis of sludge aggregates produced during electrocoagulation of model wastewater
This paper presents the results of the study of sludge aggregates produced during electrocoagulation of model wastewater of a composition corresponding to the effluents from the cellulose and paper industry. Wastewater was electrocoagulated statically using aluminium electrodes with a current density of 31.25 A m−2 and 62.50 A m−2. In subsequent stages of the treatment, sludge flocs were ...
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Integrating anaerobic processes into wastewater treatment
Over the past decade, the concept of anaerobic processes for the treatment of low temperature domestic wastewater has been introduced. This paper uses a developed wastewater flowsheet model and experimental data from several pilot scale studies to establish the impact of integrating anaerobic process into the wastewater flowsheet. The results demonstrate that, by integrating an expanded granular ...
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Development of a model for activated sludge aeration systems: linking air supply, distribution, and demand
During the design of a water resource recovery facility, it is becoming industry practice to use simulation software to assist with process design. Aeration is one of the key components of the activated sludge process, and is one of the most important aspects of modelling wastewater treatment systems. However, aeration systems are typically not modelled in detail in most wastewater treatment ...
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Development of a model for activated sludge aeration systems: Linking air supply, distribution, and demand. Water Science & Technology
Abstract: During the design of a water resource recovery facility, it is becoming industry practice to use simulation software to assist with process design. Aeration is one of the key components of the activated sludge process, and is one of the most important aspects of modelling wastewater treatment systems. However, aeration systems are typically not modelled in detail in most wastewater ...
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Energy consumption model for wastewater treatment process control
Wastewater treatment must satisfy discharge requirements under specified constraints and have minimal operating costs (OC). The operating results of wastewater treatment processes (WWTPs) have significantly focused on both the energy consumption (EC) and effluent quality (EQ). To reflect the relationship between the EC and EQ of WWTPs directly, an extended Elman neural network-based energy ...
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Detailed dynamic pumping energy models for optimization and control of wastewater applications
Despite the increasing level of detail in wastewater treatment process models, oversimplified energy consumption models (i.e. constant ‘average’ power consumption) are being used in optimization exercises. A new dynamic model for a more accurate prediction of pumping costs in wastewater treatment has been developed to overcome this unbalance in the coupled submodels. The model is ...
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Mullite ceramic membranes for industrial oily wastewater treatment: experimental and neural network modeling
In this paper, results of an experimental and modeling of separation of oil from industrial oily wastewaters (desalter unit effluent of Seraje, Ghom gas wells, Iran) with mullite ceramic membranes are presented. Mullite microfiltration symmetric membranes were synthesized from kaolin clay and α-alumina powder. The results show that the mullite ceramic membrane has a high total organic carbon and ...
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Mathematical modelling of biofilms and biofilm reactors for engineering design
Mathematical models are critical to modern environmental biotechnology—both in research and in the engineering practice. Wastewater treatment plant (WWTP) simulators are used by consulting engineers and WWTP operators when planning, designing, optimizing, and evaluating the unit processes that comprise municipal and industrial WWTPs. Many WWTP simulators have been expanded to include a submerged ...
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Oil Skimmers Helps Major Global Energy Project Meet Tough Environmental Standards
Oil Skimmers, Inc., a 40-year-old provider of customized floating tube oil skimmers, recently completed one of the largest and most complex orders of the year in its industry, supplying one of the world’s most significant energy projects located in the Pacific Rim. Oil Skimmers was chosen to supply 23 Model 6V oil skimming systems for a large international oil and gas company that has ...
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Simulation of municipal-industrial full scale WWTP in an arid climate by application of ASM3
In developing countries, and due to the high cost of treatment of industrial wastewater, municipal wastewater treatment facilities usually receive a mixture of municipal wastewater and partially treated industrial wastewater. As a result, an increased potential for shock loads with high pollutant concentrations is expected. The use of mathematical modelling of wastewater treatment is highly ...
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Should you Buy a Wastewater Evaporator?
Industrial wastewater varies dependent on the factory in question and what the water is being used to clean or lubricate during the manufacturing process. Some facilities wash machine parts to remove oil, resulting in an oily wastewater. Other manufacturers commingle water of various uses. For example, dirt and oil from mop water, metal fines and dissolved metals from tumbler wastewater, and ...
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Shall we upgrade one-dimensional secondary settler models used in WWTP simulators? – An assessment of model structure uncertainty and its propagation
In WWTP models, the accurate assessment of solids inventory in bioreactors equipped with solid-liquid separators, mostly described using one-dimensional (1-D) secondary settling tank (SST) models, is the most fundamental requirement of any calibration procedure. Scientific knowledge on characterising particulate organics in wastewater and on bacteria growth is well-established, whereas 1-D SST ...
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Performance comparison between a two-reactor cascade and a single tank in an activated sludge wastewater treatment process
We investigate a model for the treatment of wastewater in the activated sludge process. The process is based on the aeration of wastewater with flocculating biological growth, followed by the separation of treated wastewater from biological growth. The biochemical model consists of two types of bacteria: sludge bacteria and sewage bacteria; and two types of ciliated protozoa: free-swimming ...
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