Ultrasound efficiency in relation to sodium hypochlorite and filtration adsorption in microbial elimination in a water treatment plant

Bello, Antonio Roberto Crystal; Angelis, Dejanira de Franceschi de; Domingos, Roberto Naves

doi:10.1590/s1516-89132005000600009

Cited by 8 publications

(7 citation statements)

References 3 publications

(2 reference statements)

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“…Energy is transmitted by the vibration of the molecules in the environment where the wave is spread. 16 In ultrasonic waves, cavitation is the phenomena responsible for the formation, growth, and collapse of microbubbles or cavities occurring in extremely small time interval (milliseconds) in a liquid. 17 Ultrasonic cavitation serves as the primary mechanism for sonochemical effects, where bubble collapse produces intense local heating (3000−5000 K), high pressures (500−10,000 atm), microjets, turbulence, and acoustic streaming.…”

Section: Introductionmentioning

confidence: 99%

“…It is well-known that ultrasound can induce a wide range of chemical and physical consequences. Energy is transmitted by the vibration of the molecules in the environment where the wave is spread . In ultrasonic waves, cavitation is the phenomena responsible for the formation, growth, and collapse of microbubbles or cavities occurring in extremely small time interval (milliseconds) in a liquid .…”

Section: Introductionmentioning

confidence: 99%

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Influence of Ultrasonication Conditions on the Structure and Performance of Poly(vinylidene fluoride) Membranes Prepared by the Phase Inversion Method

Pan

et al. 2014

Ind. Eng. Chem. Res.

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The morphology and crystallization properties of poly(vinylidene fluoride) ultrafiltration membranes prepared by the phase inversion method were investigated under ultrasound-assisted conditions in a coagulation bath. All the membranes showed improved performance compared with that of the pristine membrane, including preferable morphology, higher porosity, and higher flux for water and a Rose Bengal (RB) aqueous solution. With an increase in the ultrasonic intensity, the flux of membranes for both water and RB aqueous solution increased gradually, while the rejection by all membranes was nearly 80%. The porosity was measured by the percentage water content. Phase separation was accelerated and macrovoids developed with an increase in ultrasonic intensity, resulting in an improvement in membrane porosity. The crystalline structure was assessed by wide-angle X-ray diffractometry and attenuated total reflectance Fourier transform infrared spectroscopy. It was also shown that the β crystalline phase was partly converted to the α crystalline phase in the ultrasound-assisted phase inversion process. Membranes prepared by ultrasound-assisted phase inversion exhibited elongation greater than that of the pristine membrane.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Ultrasonication Conditions on the Structure and Performance of Poly(vinylidene fluoride) Membranes Prepared by the Phase Inversion Method

Pan

et al. 2014

Ind. Eng. Chem. Res.

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“…The motion of the molecules in the setting in which the wave spreads (Bello, Angelis, & Domingos, 2005) is transmitted energy by US waves. Ultrasound has ranges of approximately 10 to 10 cm in successive waves of compression.…”

Section: Sound Theorymentioning

confidence: 99%

Water purification using ultrasound waves: application and challenges

Fetyan

Salem

2020

Arab Journal of Basic and Applied Sciences

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Due to the scarcity of water resources and the harmful effects of sewage on water bodies, water purification becomes an important issue. The application of ultrasonic waves is a novel technique developed for water purification. This technology works as an advanced method of oxidation, contributing to the elimination of various types of contaminants. The basic principle of ultrasound is based on the destruction of both bacterial cells and difficult todegrade organics. A brief overview of water purification methods, application of ultrasound, ultrasound waves theory and the benefits and drawbacks of using ultrasound waves in water purification will be discussed in this article. In addition, the role of ultrasound waves in the degradation of various organic contaminants, microbial pollutant disinfection, and other pollutants removal.

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“…Ultrasound frequency range is beyond the range that humans can hear, that is beyond 20-20,000Hz range and below 600kHz (Deymier et al, 2004;Wong, 2002). Ultrasound is the energy passed on the water molecules where the molecules are subjected to vibration (Bello et al, 2005). The Ultrasound can be produced with two methods.…”

Section: Introductionmentioning

confidence: 99%

Optimized Ann Model for Ultrasonication Wastewater Treatment Process

Huggi¹,

Shashikant.R.Mise²

2019

IJPTM

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In this work, ANN model has been used to optimize the input factors in the ultrasonication process. The required parameters for the ultrasonication process to achieve the maximum percentage of solids reduction are derived using the optimization methods. Experiments are conducted to verify the optimum parameters achieved. Eight samples of untreated water have been subjected to five treatment methods. The treatment methods like STP, RZT, TWP, Ultrasonication and Optimized ultrasonication treatment methods are used to treat the water and the values of parameters like pH, TSS, TDS, COD and BOD are measured for all the five methods. The improvement in each method is analyzed. It has been determined that Optimized ultrasonication treatment method yielded the best performance over all other four methods.

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Ultrasound efficiency in relation to sodium hypochlorite and filtration adsorption in microbial elimination in a water treatment plant

Abstract: ABSTRACT

Cited by 8 publications

References 3 publications

Influence of Ultrasonication Conditions on the Structure and Performance of Poly(vinylidene fluoride) Membranes Prepared by the Phase Inversion Method

Influence of Ultrasonication Conditions on the Structure and Performance of Poly(vinylidene fluoride) Membranes Prepared by the Phase Inversion Method

Water purification using ultrasound waves: application and challenges

Optimized Ann Model for Ultrasonication Wastewater Treatment Process

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