Oil production from wells reduces with time and the well becomes uneconomic unless enhanced oil recovery (EOR) methods are applied. There a number of currently available each has specific advantages disadvantages depending on conditions. Currently there is big demand for new or improved technologies in this field, hope that these might also be applicable to which have already been subject EOR. The sonochemical method EOR one most promising important it can applied treatment horizontal wells....

To prevent possible spread of nosocomial infections – HAI (Healthcare Acquired Infections) in healthcare facilities, Antibacterial textiles are developed. This carried out study has been conducted to assess the feasibility method obtaining antibacterial coatings on textile materials. Specifically, sol-gel for synthesis titanium dioxide nanoparticles combination with zinc oxide from titanyl sulphate and nitrate hexahydrate investigated. During nanoparticles, coated material showed stable...

An ultrasonic technology for enhanced oil recovery is described. For the implementation of this technology, equipment was specially developed, taking into account working conditions. The criteria selections well candidates were developed. has been tested in two different regions geological results these field tests indicate high efficiency proposed technology. success rate method reached 90% and increase production range 40% - 100%.

Although water contamination with drug residues is a threat to public health, there are currently barely any effective methods of purifying from pharmaceutical substances. In this study, continuous-flow sonoplasma treatment was used for the complete degradation tetracycline and ciprofloxacin in polluted municipal water. The addition CeO2 nanoparticles as catalysts significantly increased rate antibiotics, degree 70% achieved. presence reactive oxygen species CeO2-nanoparticle-containing...

A method for the production of antibacterial ZnO nanoparticles has been developed. The technique combines passing an electric current with simultaneous application ultrasonic waves. By using high-power ultrasound a cavitation zone is created between two zinc electrodes. This leads to possibility create spatial electrical discharge in water. Creation such depletion electrodes and formation nanoparticles, which demonstrate properties. At end this reaction suspension transported specially...

We have investigated the critical temperature behavior in periodic superconductor/ ferromagnet (S/F) multilayers as a function of ferromagnetic layer thickness $d_f$ and interface transparency. The $T_c(d_f)$ exhibits damped oscillatory these systems due to an exchange field material. In this work we performed $T_c$ calculations using self-consistent multimode approach, which is considered be exact solving method. Using approach derived conditions 0 or $\pi$ state realization S/F...

A theoretical model for an electrical discharge in a cavitating liquid is developed and compared with experiments the optimization of water treatment device. The calculations based on solution Noltingk─Neppiras equation support hypothesis that electric field promotes formation vapor microchannels inside gap between electrodes, where at low gas pressure Paschen's conditions rupture abnormal glow maintenance those are fulfilled. Theoretical analysis cavitation processes qualitative agreement...

Acoustic fields formed during operation of ultrasonic reactors with waveguides following types: rod-type, cylindrical rectangular protrusions and tubular were calculated measured. The influence distribution acoustic arising from the waveguide systems three different types on efficiency activation alumosilicic flocculant-coagulant magnetite intended for water purification was investigated. It shown that regardless equipment used an industrial scale it is possible to reactivate even after...

Various types of chemical and physical protocols are used, thermal treatment in particular, to increase the quality bulk food products (for example, dates or some sort nuts) extend shelf life, combinations methods frequently used achieve best results. However, use these processing is not always option preserve initial taste appearance products. For instance, a product may lose its natural acquire different flavors due transformations that occur at certain temperatures when treated with...

Nowadays, the problem of biocorrosion equipment placed inside oil wells due to injection unprepared water into reservoirs in order increase reservoir pressure is becoming more and urgent [...]

The wastewater problem is becoming an increasingly significant environmental issue affecting various aspects of human activities. generation reactive oxygen species (ROS) in water through certain physicochemical processes, which can oxidize or degrade organic and chemical compounds, offers effective purification method. main advantage these methods the elimination reagents. Aim this work to investigate possibility regulating ROS content by altering characteristics plasma discharge that...

При воздействии на поток воды электрическим разрядом, генерируемым в поле кавитации, был обнаружен эффект пролонгированного воздействия растворенные воде органические вещества. Такой обусловлен возникающими технологическом процессе активными формами кислорода и разложением молекулы результате химических преобразований. Проведённые исследования показали, что основные изменения свойств обработанной связаны с существенным уменьшением окислительно-восстановительного потенциала вплоть до...

With the aim of developing an innovative water treatment approach for countries in Global South, we have applied method treating a cavitating stream with plasma discharge under real conditions. To this end, optimised after investigating effects that occur treated medium during such treatment. Based on obtained light absorption curves model solutions titanium oxysulphate and potassium bichromate, it was found inside reactor main role destruction chemical contaminants is played by hydroxide...

The wastewater problem is becoming an increasingly significant environmental issue affecting various aspects of human activities. generation reactive oxygen species (ROS) in water through certain physicochemical processes, which can oxidise or degrade organic and chemical compounds, offers effective purification method. main advantage these methods the elimination reagents. aim this work to investigate possibility regulating ROS content by altering characteristics plasma discharge that...

With the aim of developing an innovative water treatment approach for countries in Global South, we have applied method treating a cavitating stream with plasma discharge under real conditions. To this end, optimised after investigating effects that occur treated medium during such treatment. Based on obtained light absorption curves model solutions titanium oxysulphate and potassium bichromate, it was found inside reactor main role destruction chemical contaminants is played by hydroxide...

Water treatment methods based on cold plasma discharge in cavitating liquid have been actively developing recent years. However, some conditions, such as the conductivity of medium, can limit possibility ignition. The authors proposed a new method for activating an electric environment use external corona electrode reactor. It has experimentally shown that, configuration, breakdown voltage is significantly reduced. A theoretical analysis process was carried out, and modified Paschen's curve...

В лабораторных и натурных условиях тропического климата Вьетнама (г. Ханой, КИС Хоа Лак) на микологической площадке исследовали стойкость образцов ткани с нанопокрытием ZnO к воздействию плесневых грибов. Нанопокрытие производилось опытно-промышленной установке использованием золь-гель метода под воздействием мощного ультразвука частотой 19,1 кГц. Лабораторные испытания показали высокую биостойкость тканей по сравнению контрольным образцом. тропических протяжении 24 месяцев образцах...

Water disinfection and potential sterilization in continuous flow was achieved a hybrid reactor with broadband hydrodynamic emitter combined ultrasonic vibrations at different frequencies excess pressure. Such combination showed synergistic effects by increasing the acoustic power vortex flow. The present physical treatment, compared sonication alone, could increase microorganism inactivation 15–20%.