Basic Principles of Wastewater Treatment

Sperling, Marcos von

doi:10.2166/9781780402093

Cited by 40 publications

(46 citation statements)

References 19 publications

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“…Kd is decay coefficient and ϴC is mean cell residence time (ratio of total biomass in the reactor to the biomass wasted for a given time, time represent the average time). (12) Combination and rearrangement of Equations (11) and (12), the kinetic parameter Y and Kd can be obtained : (13) Regression coefficient and kinetic parameter can be obtained by plotting curve of [(S0-…”

Section: (11)mentioning

confidence: 99%

Kinetic Study of Anaerobic Digestion of Ketchup Industry Wastewater in a Three-stages Anaerobic Baffled Reactor (ABR)

Sumantri

Budiyono

Purwanto

2019

Bull. Chem. React. Eng. Catal.

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The anaerobic digestion of the ketchup industry's wastewater in a three-stage 60 L capacity baffled reactor has been studied. The effect of concentrations of the initial chemical oxygen demand (2727.3-12086.7 mg/L), on the ABR performance and kinetic models were investigated. The ABR performance was evaluated by measuring the concentrations of each compartment of the COD, calculating its percentage removal, and the acquired data were fitted to the kinetic models. From the initial input, the three-stage ABR successfully removed 90 % of COD, for the initial COD until the concentration was 5324.6 mg/L it achieved stationary phase with HRT 5-10 days, while for initial COD until the concentration was 12086.7 mg/L is attained, the stationary was at 10 days. The kinetic model of second order Grau was suitable for the data, with k2 of 0.6061 d -1 and R 2 of 0.9955.

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Section: (11)mentioning

confidence: 99%

Kinetic Study of Anaerobic Digestion of Ketchup Industry Wastewater in a Three-stages Anaerobic Baffled Reactor (ABR)

Sumantri

Budiyono

Purwanto

2019

Bull. Chem. React. Eng. Catal.

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“…Measurements of the oxygen transfer in clean water and for the different operating conditions listed in Table 1 were carried out using a standard unsteadystate, reaeration method (ASCE, 2007;Von Sperling, 2007). Anhydrous sodium sulfite, Na 2 SO 3 , and crystalline cobalt (II) chloride hexahydrate, CoCl 2 ·6H 2 O, were used as deoxygenation chemicals.…”

Section: Oxygen Transfer Measurementsmentioning

confidence: 99%

Towards a robust CFD model for aeration tanks for sewage treatment – a lab-scale study

Karpinska

Bridgeman

2017

Engineering Applications of Computational Fluid Mechanics

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Detailed insight into the hydrodynamics of aeration tanks is of crucial importance for improvements in treatment efficiency, optimization of the process design and energy-efficient operation. These factors have triggered increasing interest in the use of Computational Fluid Dynamics (CFD) to evaluate performance of wastewater treatment systems. Whilst factors such as incorrect input assumptions, poor model choice and excessive simplifications have been recognized as potential sources of output errors, there remains a need to identify the most robust strategy to faithfully simulate aeration tank performance. Therefore, the focus of this work was to undertake rigorous transient simulations of the hydrodynamics and oxygen mass transfer in a lab-scale aeration tank in order to work towards the development of robust modeling guidelines for activated sludge systems. Unlike most previous CFD analyses of aeration systems, the work reported here employed the shear stress transport (SST) k − ω turbulence model to account for the turbulent interactions between the phases inducing bubble breakup and/or coalescence, and as a consequence, promoting the formation of bubbles of different sizes and shapes. The results obtained were compared with those arising from an analysis using the standard k − ε (sk − ε) model -and assuming fixed bubble diameter-the most common CFD modeling framework used within the wastewater modeling community. Model validation was achieved using acoustic Doppler velocimetry and particle image velocimetry techniques, and experimentally derived oxygen mass transfer data. Limitations of both turbulence models used and modeling assumptions concerning bubbly flow are discussed. The benefits of the SST k − ω turbulence model are demonstrated, but the need to balance the increased computational expense of this approach compared to the sk − ε model and, indeed, bubble flow modeling are recognized. Thus, this paper presents the first rigorous analysis of turbulence model and bubble flow generation models together for activated sludge system optimization.

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“…Depending on the diurnal variations of the influent flows to the system, which can sometimes increase or decrease the reactor fill time, the operational cycles can have durations longer than those recommended [11] [12]. The automation level of the system also interferes with the duration of the operational cycles.…”

Section: Principles Of the Processmentioning

confidence: 99%

Study on the Effect of Variation of Flow in Sequencing Batch Reactor Using PCA and ANOVA

Vijayan¹,

Saravanane²,

Sundararajan³

2017

GEP

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Wastewater treatment using Sequencing Batch Reactor (SBR) technology is one of the state-of-the art wastewater management systems. In this technology equalization, biological treatment and secondary clarification are performed in a single reactor in a time control sequence. SBR system is idler for the areas where the available land is limited, since it operates in less space and very cost effective even on small scales. The control of the operational parameters during the process of biological wastewater treatment is often complicated due to the dynamic change in the composition and characteristics of the raw wastewater, flow rates and other parameters influencing the complex nature of the treatment process and the process in SBR has a unique cyclic batch operation.

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Basic Principles of Wastewater Treatment

Cited by 40 publications

References 19 publications

Kinetic Study of Anaerobic Digestion of Ketchup Industry Wastewater in a Three-stages Anaerobic Baffled Reactor (ABR)

Kinetic Study of Anaerobic Digestion of Ketchup Industry Wastewater in a Three-stages Anaerobic Baffled Reactor (ABR)

Towards a robust CFD model for aeration tanks for sewage treatment – a lab-scale study

Study on the Effect of Variation of Flow in Sequencing Batch Reactor Using PCA and ANOVA

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