Rotation generator of hydrodynamic cavitation for water treatment

Petkovšek, Martin; Zupanc, Mojca; Dular, Matevž; Kosjek, Tina; Heath, Ester; Kompare, Boris; Širok, Brane

doi:10.1016/j.seppur.2013.07.029

Cited by 103 publications

(57 citation statements)

References 28 publications

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“…However, because of the very high shear rates generated ( of up to 1.6 . 10 4 s -1 at 6000 rpm) by the rotation of the teeth of the rotor and the rotation of liquid that is located between the rotor and the stator (tangential velocity of the liquid causes the liquid to circle), most probably, violent shear forces are responsible for the breakage of bonds [56,57].…”

Section: Discussionmentioning

confidence: 99%

A novel rotation generator of hydrodynamic cavitation for the fibrillation of long conifer fibers in paper production

Kosel

Šinkovec²,

Dular

2019

Ultrasonics Sonochemistry

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Discussionmentioning

confidence: 99%

A novel rotation generator of hydrodynamic cavitation for the fibrillation of long conifer fibers in paper production

Kosel

Šinkovec²,

Dular

2019

Ultrasonics Sonochemistry

Self Cite

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“…Considering that the opposite movements of two shear layers can generate shear cavitation, Petkovšek et al 41, 42 used a novel rotation cavitation generator to remove pharmaceuticals in water. The generator is based on two facing rotors with special radial grooves spinning in the opposite direction, as indicated in Fig.…”

Section: Experimental Studiesmentioning

confidence: 99%

Application of Hydrodynamic Cavitation to Wastewater Treatment

et al. 2016

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Hydrodynamic cavitation is a promising application in wastewater treatment due to its simple reactor design and capacity in large‐scale operation. Theoretical studies including the basic mechanism of pollutant degradation, modeling of pressure distribution in the cavitation reactor, and bubble dynamics models coupled with chemical reactions are evaluated. Experimental setups with different cavitation reactors and operation parameters are compared for degrading specific kinds of pollutants. The effort directions for both theoretical and experimental investigations are suggested on the basis of the reviewed contents. Easy large‐scale operation, effective combination with intensified strategies, and capability to deal with biorefractory or toxic compounds contribute to the great potential of hydrodynamic cavitation.

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“…Our initial focus was on the removal of persistent pharmaceuticals, such as ibuprofen, ketoprofen, diclofenac, naproxen, carbamazepine, and clofibric acid [24] and [25]; we applied HC for wasteactivated sludge disintegration [23]. Concurrently, we developed several cavitation reactors [26] and filed several national [27] and international [28] patents. The shift from applied towards basic research came with studies of cavitation influence on bacteria Legionella pneumophila [29].…”

Section: Contributions Of Our Research Group On the Topic Of Hc Use Imentioning

confidence: 99%

Cavitation as a Potential Technology for Wastewater Management – An Example of Enhanced Nutrient Release from Secondary Pulp and Paper Mill Sludge

Sežun

Kosel

Zupanc

et al. 2019

SV-JME

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Wastewater recycling and sludge removal in the paper industry account for about 60 % of all process costs. New and environmentally friendly wastewater treatment techniques are, therefore, continually being developed. Cavitation exploitation is currently a well-investigated topic that is also interesting for the paper production industry. This study investigates efficiency of hydrodynamic cavitation alone and in combination with the addition of NaOH for the treatment of secondary pulp and paper mill sludge in order to enhance nutrient release. First, two laboratory-scale devices were tested: the blow-through and the rotating hydrodynamic cavitation generator. The latter set-up proved to be more efficient: therefore, further experiments were performed on its pilot-scale version. The results showed an increase of soluble chemical oxygen demand (CODs) by 514 mg/L, total nitrogen (Nt) by 17.4 mg/L, and total phosphorous (Pt) by 2.3 mg/L. To further increase nutrient release combination of cavitation and sludge sample alkalinization was tested. The addition of NaOH and 30 min cavitation of secondary sludge (500 L) significantly improved CODs and Nt release by 2400 mg/L and 120 mg/L, respectively. Microbiological photos revealed a definite disintegration of sludge flocks. According to our estimates, 1.9 kg of released CODs from alkaline pre-treated and cavitated sludge would cost only one euro.

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Rotation generator of hydrodynamic cavitation for water treatment

Cited by 103 publications

References 28 publications

A novel rotation generator of hydrodynamic cavitation for the fibrillation of long conifer fibers in paper production

A novel rotation generator of hydrodynamic cavitation for the fibrillation of long conifer fibers in paper production

Application of Hydrodynamic Cavitation to Wastewater Treatment

Cavitation as a Potential Technology for Wastewater Management – An Example of Enhanced Nutrient Release from Secondary Pulp and Paper Mill Sludge

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