Application of Hydrodynamic Cavitation to Wastewater Treatment

Tao, Yuequn; Cai, Jun; Huai, Xiulan; Liu, Bin; Guo, Zhixiong

doi:10.1002/ceat.201500362

Cited by 130 publications

(70 citation statements)

References 110 publications

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“…As a result of the peculiar physical and chemical effects of controlled hydrodynamic cavitation, its applications to water and wastewater remediation -degradation of organic pollutants, reduction and solubilization of the overall organic loads, and disinfection from pathogen microorganisms -have received growing attention both in the scientific literature and industrial practice, for which recent comprehensive reviews are available (Dindar, 2016;Dular et al, 2016;Tao et al, 2016).…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Beer-brewing powered by controlled hydrodynamic cavitation: Theory and real-scale experiments

Albanese

Ciriminna

Meneguzzo

et al. 2017

Journal of Cleaner Production

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The basic beer-brewing industrial practices have barely changed over time. While well proven and stable, they have been refractory to substantial innovation. Technologies harnessing hydrodynamic cavitation have emerged since the 1990s' in different technical fields including the processing of liquid foods, bringing in advantages such as acceleration of extraction processes, disinfection and energy efficiency. Nevertheless, so far beer-brewing processes were not investigated. The impacts of controlled hydrodynamic cavitation, managed by means of a dedicated unit on a real microbrewery scale (230 L), on the beer-brewing processes is the subject of this paper. The physico-chemical features of the obtained products, analyzed by means of professional instruments, were compared with both literature data and data from the outcomes of a traditional equipment. Traditional processes such as dry milling of malts and wort boiling becoming entirely unnecessary, dramatic reduction of saccharification temperature, acceleration and increase of starch extraction efficiency, relevant energy saving, while retaining safety, reliability, scalability, virtually universal application to any brewing recipe, beer quality, were the most relevant experimental results. The impacts of these findings are potentially far reaching, beer being the worldwide most widely consumed alcoholic beverage, therefore highly relevant to health, environment, the economy and even to local identities.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Beer-brewing powered by controlled hydrodynamic cavitation: Theory and real-scale experiments

Albanese

Ciriminna

Meneguzzo

et al. 2017

Journal of Cleaner Production

View full text Add to dashboard Cite

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“…[44,45] The main scope of this research does not include overcoming the listed problems that potentially could be solved by using standardized and commercialized devices. [46] The aim is to deepen our understanding of hydrodynamic cavitation for future industrial scale application for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Study of the effect of operative conditions on the decolourization of azo dye solutions by using hydrodynamic cavitation at the lab scale

2020

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In the present study, the potentiality of hydrodynamic cavitation (HC) for the degradation of methyl orange from synthetic aqueous solutions is presented. Hydrodynamic cavitation was set up at laboratory scale using a Venturi tube. Solutions of methyl orange (MO) were subjected to cavitation in order to investigate the efficiency and the potential of this technique for azo dye degradation. Moreover, a HC/H2O2/TiO2 hybrid system was tested with the aim to verify its potential positive impact on the decolourization process and define the best conditions, among those investigated, to remove azo dye from synthetic solutions. The results obtained in this study showed that the maximum efficiency was close to 30% using a Venturi tube at an operating pressure of 400 kPa. The presence of additives, such as titanium dioxide and hydrogen peroxide, increased the performance of the degradation process to slightly above 70%.

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“…The main features of the technological mediums processing are: − the mechanical influence on the particles of a heterogeneous mediums consisting of shock and abrasive loads during contact with the working parts of the rotary pulsed apparatus; − the hydrodynamic effect, which manifests itself in significant tangential stresses in the fluid, developed turbulence, pressure pulsations and fluid flow speeds; − the hydroacoustic influence on the liquid system is carried out by the microscale pressure pulsations, intense cavitation, shock waves and nonlinear acoustic effects [5,6]. For a complete description of the mixing process and the treatment modes, the first necessary condition is the establishment of qualitative and quantitative coherency between the properties and the physical and chemical parameters of the initial components.…”

Section: Introductionmentioning

confidence: 99%

Modelling of the hydrodynamic conditions throughout liquid system treatment by alternating impulses of pressure

Dubovkina¹,

Davydenko²,

Rikhter³

2019

Ukr. food j.

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Introduction. The purpose of this scientific work is to research the influence of the application of alternating impulses of pressure throughout treatment of liquid solutions by the numerical modelling. Materials and methods. The volume parametric imitation and visualization, modelling methods, math modelling methods were used for the description of the conditions at the working parts of the rotary pulsed apparatus during the liquid treatment. Experimental investigations of liquid samples were carried out with using potentiometry laboratory measurement procedure. Results and discussion. In this paper, it is established that the local values of pressure in the sector of input of water and water systems and the output of the water systems from the gaps vary: at the external surface of the internal rotor from-50 to +300 kPa; at the external stator surface from-150 to 100 kPa; at the inner stator surface from +40 to-120 kPa; at the inner surface of the external rotor from +100 to-100 kPa. During the last values cavitation and adiabatic boiling can be present. Throughout the water and water solutions treatment and during the processes of mixing liquid associated components in the conditions of hydrodynamic fluctuation as alternating impulses of pressure characterized the changing of pressure: ΔР = 350 kPa near an outside surface of an interior spinning rotor; ΔР = 250 kPa near an outside stator surface; ΔР = 160 kPa near an interior stator surface; ΔР = 200 kPa near an interior surface of an outside spinning rotor. By the consequences of the computation was established that the principal values of speeds of shift of a stream emerge in RPA with coaxial clearances between first rotors, stator and second rotor 100 mkm. Conclusions. Throughout the calculations was found the values of pressure changing in working chamber of rotary-pulsating apparatus between coaxial cylinders «rotor-stator-rotor» system. These give us the possibility to receive the liquids with necessary and required physical and chemical properties and parameters by the no reagent influence and to control this processes.

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Application of Hydrodynamic Cavitation to Wastewater Treatment

Cited by 130 publications

References 110 publications

Beer-brewing powered by controlled hydrodynamic cavitation: Theory and real-scale experiments

Beer-brewing powered by controlled hydrodynamic cavitation: Theory and real-scale experiments

Study of the effect of operative conditions on the decolourization of azo dye solutions by using hydrodynamic cavitation at the lab scale

Modelling of the hydrodynamic conditions throughout liquid system treatment by alternating impulses of pressure

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