wastewater modeling Articles

  • Determination of Flow Rates in part-filled Applications using the Radar Method

    Introduction The radar measurement method plays an increasingly important role in the water and wastewater field. This is particularly reflected by the "Metering outside of the medium" trend. Flow measurement using radar which enables contactless measurements thus becomes a major focal point. It features a wide range of applications and hence is useful as permanent measurement system for ...


    By NIVUS GmbH

  • Simulation of wastewater treatment plant within integrated urban wastewater models

    In the federal state of Hesse in Germany the application of an integrated software modelling framework is becoming part of the planning process to attain legal approval for the operation of combined sewer systems. The software allows for parallel simulation of flow and water quality routing in the sewer system and in receiving rivers. It combines existing pollution load model approaches with a ...


    By IWA Publishing

  • Canarina DESCAR software · wastewater modeling · algorithms 3

    The pollutant concentration, in a certain instant, and at a distance x (meters) in the X-Axis and at a distance y(meters) in the Y-Axis will be given by:  c =cc exp[-(r/b)2] (1) where c is the pollutant concentration, r is the distance from the point (that we are calculating) to the ...

  • 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 ...


    By IWA Publishing

  • Is modeling of biological wastewater treatment a mature technology?

    Based on three case studies it is demonstrated that the application of mathematical models in biological wastewater treatment has not yet reached its full potential. Model structure uncertainty and correlation of uncertain parameter values make up the first case. The combination of biokinetic and hydraulic models relates to the second case. The evolution of a full scale plant over its life ...


    By IWA Publishing

  • Perspectives on modelling micropollutants in wastewater treatment plants

    Models for predicting the fate of micropollutants (MPs) in wastewater treatment plants (WWTPs) have been developed to provide engineers and decision-makers with tools that they can use to improve their understanding of, and evaluate how to optimize, the removal of MPs and determine their impact on the receiving waters. This paper provides an overview of such models, and discusses the impact of ...


    By IWA Publishing

  • A novel multistage kinetic modeling of flotation for wastewater treatment

    This study develops a new model for description of flotation kinetics. It defines flotation as a process that consists of several stages: separated air bubbles and particles, air bubbles and particles forming an aggregate, aggregate rising to the froth layer. This description significantly differs from known models, which are much simplified. The multistage model gives a novel in-depth ...


    By IWA Publishing

  • Uncertainty Analysis in Wastewater Engineering Modeling: Understanding the Limitations

    ABSTRACT Design engineers commonly rely on physical and mathematical approximations or models of real complex phenomena. During the development of these physical or mathematical models, simplifications and assumptions need to be made to develop such tools. It is unrealistic to expect that the modeling process will give an answer that is a perfect match to the real case, and it is, therefore, ...

  • New framework for standardized notation in wastewater treatment modelling

    Many unit process models are available in the field of wastewater treatment. All of these models use their own notation, causing problems for documentation, implementation and connection of different models (using different sets of state variables). The main goal of this paper is to propose a new notational framework which allows unique and systematic naming of state variables and parameters of ...


    By IWA Publishing

  • Control of Wastewater Treatment Plants

    Instrumentation, control and automation (ICA) of wastewater treatment systems and sewer networks have attracted much attention since the early 1970s. The developments during the last four decades in on-line instrumentation, computer technology, process understanding and subsequent model development, and control methods have been powerful driving forces for advanced control making ICA ever more ...


    By IWA Publishing

  • Extant Kinetics Of Mixed Wastewaters

    Extant Kinetics Of Mixed Wastewaters OUR fingerprints can be used to estimate kinetic parameters for the wastewater constituents as shown in Figure A and B below. Wastewater A contained one group of readily degraded compounds and one group that was degraded at lower rates. A third region of oxygen uptake was caused by nitrification. Kinetic modeling suggested that biodegradation of each ...


    By Challenge Technology

  • CFD for wastewater treatment: an overview

    Computational fluid dynamics (CFD) is a rapidly emerging field in wastewater treatment (WWT), with application to almost all unit processes. This paper provides an overview of CFD applied to a wide range of unit processes in water and WWT from hydraulic elements like flow splitting to physical, chemical and biological processes like suspended growth nutrient removal and anaerobic digestion. ...


    By IWA Publishing

  • Skimming Oily Wastewater

    As large generators of oily wastewater tighten effluent controls, the U.S. Environmental Protection Agency (EPA) is targeting smaller generators. Some of the firms receiving their attention are smaller manufacturing plants, automotive garages, mobile equipment service shops and truck farms. Many of these firms do not have access to a sanitary sewer system that will accept oily wastewater. Because ...


    By Abanaki Corporation

  • Optimizing Wastewater Treatment

    ' Growing volumes of both industrial and municipal wastewater are being discharged to surface waters but the treatment provided frequently is inadequate to protect the desired uses of the receiving waters. With limited resources in terms of both institutional capacity and finance, governments face difficult choices in optimizing their investments in municipal systems and establishing practical ...


    By The World Bank

  • Wastewater Treatment in Turbo Mode

    Sulzer turbocompressors type ABS HST are successful in wastewater treatment. Today, 2000 units are installed around the world—for example, in municipal plants like in the city of Sögel, Germany. Here, the turbocompressors not only reduced the operating costs but also helped the plant to cope with load fluctuations. The secret behind this success is an advanced design with proven ...


    By Sulzer

  • Integrated Wastewater Management

    ' Appropriate wastewater management, within an overall water resources management program, is essential to responsible use of the environment and to affordable provision of services. Such management programs are best developed at a river basin or sub-catchment level. An approach is outlined for developing a wastewater strategy and an implementation plan for a river basin.' Integrated ...


  • Canarina DESCAR software · plant treatment modeling · wastewater · algorithms 13

    Single port.- In such a case, we have the next relationships e=0.15H S=0.089 g’1/3 (H-e)5/3 Q-2/3 B=SQ/eUa (*) However, at high velocity values and if B<=0.3H, the approximation is not correct .   Canarina DESCAR software · plant treatment modeling ...

  • Modeling of an IFAS Process with Fungal Biomass Treating Pharmaceutical Wastewater

    The project involved the dynamic modeling of a wastewater treatment plant (WWTP) treating pharmaceutical wastewater. The WWTP uses an integrated fixed-film activated sludge (IFAS) process with suspended carriers for biological treatment. The plant is unique in that it uses both fungal and bacterial IFAS reactors. The fungal biomass has been shown in laboratory testing to degrade a portion of the ...

  • Assessing the convergence of LHS Monte Carlo simulations of wastewater treatment models

    Monte Carlo (MC) simulation appears to be the only currently adopted tool to estimate global sensitivities and uncertainties in wastewater treatment modelling. Such models are highly complex, dynamic and non-linear, requiring long computation times, especially in the scope of MC simulation, due to the large number of simulations usually required. However, no stopping rule to decide on the number ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

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