Kinetic Regularities of the Processes of Accumulation and Destruction of Microorganisms in Water at Bubbling of the Different Gases

Abstract

Kinetics of microorganisms accumulation (the first stage) and destruction (the second stage) in water dispersion in the air atmosphere and at bubbling of oxygen, argon and helium has been investigated. The accumulation of microorganism takes place in oxygen and in the air atmosphere at the first stage. The microorganisms destruction was observed at bubbling of the system by argon, helium during the whole process, however, in the air atmosphere and oxygen -in the second stage. Mathematical model of these two processes was elaborated and the rate constants of microorganisms destruction and propagation were calculated.

Gas Nature Effect on the Destruction of Various Microorganisms Under Cavitation Action

“…We observed that sonication enhanced the breakup of floc caused by microorganisms clumping together, which made them more susceptible to disinfection [11]. A mathematical model for the gas (Ar, He, О 2 ) effect on the process of water purification from Bacillus bacteria type in the absence of cavitation was proposed [13]. Our investigations showed that the efficiency of microorganism destruction under the influence of cavitation was explained by cell membrane destruction induced by cavitation.…”

“…The actions of cavitation alone, of bubbling gas alone and of the simultaneous action of cavitation and gas bubbling upon the disinfection of sewage water, natural water and microbial dispersions were considered in our previous study [10][11][12]. We observed that sonication enhanced the breakup of floc caused by microorganisms clumping together, which made them more susceptible to disinfection [11]. A mathematical model for the gas (Ar, He, О 2 ) effect on the process of water purification from Bacillus bacteria type in the absence of cavitation was proposed [13].…”

The Ultrasonic Effect on Obtaining and Properties of Osteoplastic Porous Composites

“…4. The process flow diagram for the porous composites production: HEMA, water and cyclopentane volumetric tanks (1,7,8); initiator, PVP, PEG, mineral filler and AgNO 3 weighing tanks (2, 3, 4, 5, 6); mixers (9-11); mold with the initial mixture (12); mold with porous composite (13) and porous block (14) The proposed technological scheme will allow to produce the composite billets of arbitrary dimensions, which can be given the desired shape and size after mechanical treatment. This is important when using composites as bone implants.…”

“…Ultrasound energy is often used in the chemical industry to improve and intensify the technological processes. Ultrasound is acoustic vibrations with the frequencies of 2 • 10 4 Hz and higher [1,2]. When propagating in any phase, including a liquid one, such vibrations cause a range of specific effects, in particular ultrasonic cavitation and the initiation of chemical reactions [3].…”

Mechanism and Kinetic Regularities of Inactivating Effects of Cavitation on Microorganisms

“…The authors have presented data on the disinfection by cavitation which is generated by ultrasonication, hydrodynamic effects or electro-impulse discharges. Nowadays the most investigated and studied are the processes of water disinfection under ultrasound cavitation [2,8,15,20], but this method is suitable only for the treatment of small water reservoirs, which is explained by the low efficiency and great power consumption of this process. The efficiency of this method is explained by the authors by the microbe cells rupture, which occurs in the area of the pressure gradients effect and the temperature pulsation.…”