Hydrodynamic Cavitation

Hydrodynamic Cavitation A systematic introduction to critical technologies and applications of hydrodynamic cavitation In Hydrodynamic Cavitation: Devices, Design, and Applications, a distinguished team of researchers delivers an authoritative discussion of key aspects of hydrodynamic cavitation, including the design, characterization, and modeling of the devices. The book offers discussions of state-of-the-art applications of the technology, including the disinfection of water, wastewater treatment, biomass processing, and many other industrial applications. In addition to expansive case studies, the book provides an up-to-date exploration of emerging innovations and future applications of the technology. Readers will also find: A thorough introduction to hydrodynamic cavitation devices, including those based on axial and rotational flows An in-depth examination of the experimental characterization of cavitation devices and computational models Comprehensive explorations of the applications of hydrodynamic cavitation, including the disinfection of water and wastewater treatment Accessible discussions of industrial applications of hydrodynamic cavitation Perfect for chemical and process engineers, water chemists, mechanical engineers, and food chemists, Hydrodynamic Cavitation will also earn a place in the libraries of food and environmental technologists.

Hydrodynamic Cavitation A systematic introduction to critical technologies and applications of hydrodynamic cavitation In Hydrodynamic Cavitation: Devices, Design, and Applications, a distinguished team of researchers delivers an authoritative discussion of key aspects of hydrodynamic cavitation, including the design, characterization, and modeling of the devices. The book offers discussions of state-of-the-art applications of the technology, including the disinfection of water, wastewater treatment, biomass processing, and many other industrial applications. In addition to expansive case studies, the book provides an up-to-date exploration of emerging innovations and future applications of the technology. Readers will also find: A thorough introduction to hydrodynamic cavitation devices, including those based on axial and rotational flows An in-depth examination of the experimental characterization of cavitation devices and computational models Comprehensive explorations of the applications of hydrodynamic cavitation, including the disinfection of water and wastewater treatment Accessible discussions of industrial applications of hydrodynamic cavitation Perfect for chemical and process engineers, water chemists, mechanical engineers, and food chemists, Hydrodynamic Cavitation will also earn a place in the libraries of food and environmental technologists.

Containing the state-of-the-art in hydrodynamic cavitation, the book consists of two parts. The first part presents the physical basis of cavitation and a systematic classification of various kinds of cavitation and their formation sources. Special attention is paid to a group of factors that promote cavitation formation in natural liquids. A gener

Containing the state-of-the-art in hydrodynamic cavitation, the book consists of two parts. The first part presents the physical basis of cavitation and a systematic classification of various kinds of cavitation and their formation sources. Special attention is paid to a group of factors that promote cavitation formation in natural liquids. A general model of cavitation is formulated as well as a sub-model describing dynamics of the formation, development and collapse of cavitation bubbles. The sub-model also includes effects of cavitation bubble occurrence on the liquid in the direct vicinity of bubbles. Finally, part one also includes a thermodynamic hydrocavitation model of water containing cavitation nuclei (natural waters). The second part deals with the application of hydrodynamic cavitation effects to advanced oxidation of substances that pollute the natural environment. Results of laboratory experiments on the application of cavitation effects to decompose selected organic compounds which hardly undergo biodegradation are presented, as well as a concept of the cavitation phenomenon application on an industrial scale. Application of Hydrodynamic Cavitation in Environmental Engineering will be useful to professionals dealing with the design and practical application of hydrocavitation reactors, and to academics in environmental engineering.

Despite the fact that chemical applications of ultrasound are now widely acknowledged, a detailed presentation of inorganic systems covering nano-particles, catalysis, aqueous chemistry of metallic solutions and their redox characteristics, both from a theoretical and experimental perspective has eluded researchers of this field. Theoretical and Experimental Sonochemistry Involving Inorganic Systems fills this gap and presents a concise and thorough review of this fascinating area of Sonochemistry in a single volume.

Hydrodynamic cavitation (HC) has been explored by many researchers over the years after the first publication on hydrolysis of fatty oils using HC was published by Pandit and Joshi [Pandit AB, Joshi JB. Hydrolysis of fatty oils: effect of cavitation. Chem Eng Sci 1993; 48: 3440-3442]. Before this publication, most of the studies related to cavitation in hydraulic system were concentrated to avoid the generation of cavities/cavitating conditions. The fundamental concept was to harness the energy released by cavities in a positive way for various chemical and mechanical processes. The author, among novelties described later in his 600 patent applications and publications, pioneered in using hydrodynamic and electrophysical cavitation for numerous technological processes. Then the only known use was ships supercavitation propulsion.

The literature on cavitation chemistry is ripe with conjectures, possibilities, heuris tic arguments, and intelligent guesses. The chemical effects of cavitation have been explained by means of many theories, consisting of empirical constants, adjustable parameters, and the like. The chemists working with cavitation chemistry agree that the phenomenon is very complex and system specific. Mathematicians and physi cists have offered partial solutions to the observed phenomena on the basis of cavitation parameters, whereas chemists have attempted explanations based on the modes of reaction and the detection of intermediate chemical species. Nevertheless, no one has been able to formulate a unified theme, however crude, for its effects on the basis of the known parameters, such as cavitation and transient chemistry involving extremely high temperatures of nanosecond durations. When one surveys the literature on cavitation-assisted reactions, it is clear that the approach so far has been "Edisonian" in nature. While a large number of reactions have showed either enhanced yields or reduced reaction times, many reactions have remained unaffected in the presence of cavitation. The success or failure of cavitation reactions ultimately depends on the collapse of the cavity. Cavitation chemistry is based on the principles of the formation of small transient cavities, their growth and implosion, which produce chemical reactions caused by the generation of extreme pressures and temperatures and a high degree of micro turbulence.

A side-effect of numerous anthropogenic activities involves unfavourable changes in the natural environment. The acquisition of natural resources, especially fossil fuels, solid waste and wastewater production, as well as emission of gases and particulate matter from industrial plants and means of transport contribute to disturbances in the natural cycles of elements between different parts of the environment. Local changes lead to global effects, changing the composition of atmosphere, its capacity for absorbing the infrared radiation and temperature, which has further repercussions in the form of weather anomalies, melting glaciers, flooding, migration or extinction of species, social problems, etc. These global changes can be mitigated by local remedial actions, simultaneously taken all over the world, including Poland. Only the joint efforts of communities from different countries can be successful in preserving the world as we know it for the future generations. Realisation of this task requires the cooperation of experts across many fields of science, environmental engineering being one of most relevant. It comprises the engineering actions taken to preserve the balance of the natural environment or restore it if degradation has occurred. This monograph presents several key issues related to the actions aimed at mitigating the negative impact on the environment connected with the acquisition and transport of energy, management of municipal and industrial wastes, as well as the impact of the industry on the aquatic and soil environment. This book is dedicated to academics, engineers, and students involved in environmental engineering, who are following the advances in the research on environmental aspects of energy production and waste management.