Wastewater Treatment

Henze, Mogens; Harremoës, Poul; Jansen, Jes Cour; Arvin, Erik

doi:10.1007/978-3-662-04806-1

Cited by 220 publications

(93 citation statements)

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“…The biofilm thickness in this study, therefore, was estimated experimentally by examining the biofilm kinetics [6]. The biofilm thickness could be estimated from the results of the OUR tests.…”

Section: Biofilm Kineticsmentioning

confidence: 99%

The Role of the Biofilm in Aerobic Biological Filtration

Mimura¹,

Watanabe

Deguchi

2017

J. of Wat. & Envir. Tech.

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A small hybrid system for municipal wastewater treatment consisting of a jet mixed separator (JMS) used in a precoagulation/sedimentation process and an aerobic moving bed biofilter (MBB) used in a postbiological oxidation process was developed. The MBB is a type of downflow packed bed aerobic biofilter. It has an airlift mechanism, which refreshes the filter medium during its transport from the bottom to the top of filter bed and thereby prevents clogging of the medium. A majority of influent organic particles in the MBB adsorbed onto the biofilm, and the effluent BOD and SS concentration after 1 h of hydraulic retention time were <20 and ~ 0 mg/L, respectively. The MBB could be continuously operated without removal of excess sludge. This paper describes the mechanism of biological oxidation in the MBB as deduced by measurements of the oxygen uptake rate of the biofilm attached to the anthracite medium in the MBB.

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Section: Biofilm Kineticsmentioning

confidence: 99%

The Role of the Biofilm in Aerobic Biological Filtration

Mimura¹,

Watanabe

Deguchi

2017

J. of Wat. & Envir. Tech.

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“…Although alum and iron salts are the most widely used chemical coagulants for community water treatment (10) .…”

Section: (ііі) Secondary Treatmentmentioning

confidence: 99%

Sewage Treatment Using New Developed Techniques

Emara

Ahmed

Razek³

2010

Al-Azhar Bulletin of Science

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Sewage is water-carried wastes, in either solution or suspension that is intended to flow away from a community .It is more than 99.9% pure water and is characterized by its volume or rate of flow, its physical condition, its chemical constituents, and the bacteriological organisms that it contains. Domestic sewage causes a problem to environment so that the treatment and disposal of wastewater is not only desirable but also necessary (1) . In this study, we are concerned with the sewage treatment using different techniques. Two major techniques were applied for wastewater treatment, namely biological and chemical treatments. In biological treatment we constructed a pilot and bench scale for applying the two aerobic and anaerobic techniques to reduce some of the studied parameters as BOD, COD, nitrogen and phosphorous at the optimum condition from used time and sludges and compared these results with effluents from plant. In chemical treatment the jar test technique was used where coagulants matter as alum, ferric chloride and polymer are added by a suitable dose of each coagulants.

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“…This task as well as extensions for path and trajectory planning which help to fulfill design criteria for specific approaches for controller design (such as exact feedback linearization) will be investigated in greater detail in future research. (Henze et al, 2002). In contrast to the complete Activated Sludge Model, the reduction of nitrogen fractions is not considered in this subsystem model.…”

Section: Integration In An Interval Arithmetic Framework For the Desimentioning

confidence: 99%

Verification Techniques for Sensitivity Analysis and Design of Controllers for Nonlinear Dynamic Systems with Uncertainties

Rauh

Minisini

Hofer

2009

International Journal of Applied Mathematics and Computer Science

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Control strategies for nonlinear dynamical systems often make use of special system properties, which are, for example, differential flatness or exact input-output as well as input-to-state linearizability. However, approaches using these properties are unavoidably limited to specific classes of mathematical models. To generalize design procedures and to account for parameter uncertainties as well as modeling errors, an interval arithmetic approach for verified simulation of continuoustime dynamical system models is extended. These extensions are the synthesis, sensitivity analysis, and optimization of open-loop and closed-loop controllers. In addition to the calculation of guaranteed enclosures of the sets of all reachable states, interval arithmetic routines have been developed which verify the controllability and observability of the states of uncertain dynamic systems. Furthermore, they assure asymptotic stability of controlled systems for all possible operating conditions. Based on these results, techniques for trajectory planning can be developed which determine reference signals for linear and nonlinear controllers. For that purpose, limitations of the control variables are taken into account as further constraints. Due to the use of interval techniques, issues of the functionality, robustness, and safety of dynamic systems can be treated in a unified design approach. The presented algorithms are demonstrated for a nonlinear uncertain model of biological wastewater treatment plants.

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Wastewater Treatment

Cited by 220 publications

References 0 publications

The Role of the Biofilm in Aerobic Biological Filtration

The Role of the Biofilm in Aerobic Biological Filtration

Sewage Treatment Using New Developed Techniques

Verification Techniques for Sensitivity Analysis and Design of Controllers for Nonlinear Dynamic Systems with Uncertainties

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