Dynamic aeration for improved oxygen mass transfer in the wastewater treatment process

Herrmann-Heber, Robert; Reinecke, Sebastian Felix; Hampel, Uwe

doi:10.1016/j.cej.2019.122068

Cited by 51 publications

(24 citation statements)

References 8 publications

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“…In principle, it should be possible to optimize the amount of aeration by sensing the dissolved oxygen level and utilizing a suitable control system (Man et al 2018). Another study showed that air-pumping energy can be saved, with equivalent aeration effects, by use of intermittent air injection into a secondary wastewater treatment system (Herrmann-Heber et al 2020).…”

Section: Energy Issues Related To Aerated Biological Treatmentmentioning

confidence: 99%

Energy efficiency challenges in pulp and paper manufacturing: A tutorial review

Hubbe

2021

BioRes

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The pulp and paper industry is highly energy-intensive. In mills that use chemical pulping, roughly half of the higher heating value of the cellulosic material used to manufacture the product typically is incinerated to generate steam and electricity that is needed to run the processes. Additional energy, much of it non-renewable, needs to be purchased. This review considers publications describing steps that pulp and paper facilities can take to operate more efficiently. Savings can be achieved, for instance, by minimizing unnecessary losses in exergy, which can be defined as the energy content relative to a standard ambient condition. Throughout the long series of unit operations comprising the conversion of wood material to sheets of paper, there are large opportunities to more closely approach a hypothetical ideal performance by following established best-practices.

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Section: Energy Issues Related To Aerated Biological Treatmentmentioning

confidence: 99%

Energy efficiency challenges in pulp and paper manufacturing: A tutorial review

Hubbe

2021

BioRes

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“…The k‐ω turbulence model with shear stress transport (SST) model was adopted, which uses the k‐ε model in the core of the flow and switches to the k‐ ω model in the near‐wall regions. The rationale for the use of such a model lies in their proven accuracies in solving mixture problems in the near‐wall region . The detailed turbulence kinetic energy and specific dissipation rate can be referred to Menter …”

Section: Mathematic Modellingmentioning

confidence: 99%

High performance cooling of a HVDC converter using a fatty acid ester‐based phase change dispersion in a heat sink with double‐layer oblique‐crossed ribs

Fischer

Qiao³

et al. 2020

Int J Energy Res

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The paper concerns with a high performance cooling method for a HVDC converter using fatty acid ester-based phase change dispersion (PCD) in a heat sink with double-layer oblique-crossed ribs. Thermo-physical properties of PCDs were first characterized under both solid and liquid states, and the cooling performance of the heat exchanger was then experimentally examined, by heating two copper blocks clamped closely to the aluminium heating surfaces. A threedimensional Euler-Euler multiphase approach was further performed to evaluate the thermal performance under different operating conditions including heating power, flowrate and PCD concentration. The results showed that the

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“…The PCD are treated as impressible turbulent flow, and the PCM particle is assumed to be smooth, inelastic and spherical during the phase change condition. The k-ω turbulence model with shear stress transport (SST) model is used due to their proven accuracies in solving mixture problems in the near-wall region [48,49]. The accurate prediction of k-ω SST model is dependent on the high quality meshed grid.…”

Section: Mathematical Modelmentioning

confidence: 99%

Experimental and numerical studies of a fatty acid based phase change dispersion for enhancing cooling of high voltage electrical devices

Qiao²,

Mura³

et al. 2020

Energy

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Dynamic aeration for improved oxygen mass transfer in the wastewater treatment process

Cited by 51 publications

References 8 publications

Energy efficiency challenges in pulp and paper manufacturing: A tutorial review

Energy efficiency challenges in pulp and paper manufacturing: A tutorial review

High performance cooling of a HVDC converter using a fatty acid ester‐based phase change dispersion in a heat sink with double‐layer oblique‐crossed ribs

Experimental and numerical studies of a fatty acid based phase change dispersion for enhancing cooling of high voltage electrical devices

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