Bøger i Food Engineering serien

During the past decade, consumer demand for convenient, fresh-like, safe, high-quality food products has grown. The food industry has responded by applying a number of new technologies including high hydrostatic pressure for food processing and preservation. In addition, food scientists have demonstrated the feasibility of industrial-scale high pressure processing. This technology is of specific interest to the food industry because it provides an attractive alternative to conventional methods of thermal processing, which often produce undesirable changes in foods and hamper the balance between high quality (color, flavor, and functionality) and safety. In addition, it offers opportunities for creating new ingredients and products because of the specific actions of high pressure on bio­ logical materials and food constituents. It allows food scientists to redesign exist­ ing processes and to create entirely new ones using high pressure technology alone or in combination with conventional processes (e. g. , pressure-temperature combinations ). Researchers have investigated high pressure processing for the past century. Scientists such as Hite and Bridgman did pioneering work at the turn of the 20th century. Then during the 1980s and 1990s, there was a large effort to investigate the effects of high pressure on biological materials, particularly foods. The initial research activities in the late 1980s and early 1990s focused on exploratory activ­ ities in the food area.

An Aspen Food Engineering Series Book. This new reference work in the Food Engineering Series covers basic and new information and issues, and new and refined existing technologies in the preservation of fruits and vegetables with a minimum of processing. It begins with a section on detecting and controlling good and harmful microorganisms in fruits and vegetable tissues, then surveys a range of preservation technologies, talks about new technologies being developed in landmark multinational projects, and ends by covering the legal aspects of minimally processed produce in the United States, Europe, South America, and Asia.

Hurdle Technologies: Combination Treatments for Food Stability, Safety and Quality is the first work on hurdle technology in which all aspects, the possibilities and limitations of hurdle technology, are comprehensively outlined and evaluated. World-renowned on the subject, Leistner and Gould were instrumental in the development of the hurdle technology concept and in the last decades have obtained much practical experience in the application of this successful approach in the food industry worldwide.

One of the best ways for students or practitioners to learn is through real-life example. In this volume, Clark  presents several case studies that can be used not only by those currently working in the industry, but as a means for sparking discussion in food engineering classes. This book has several purposes: 1) to serve as a source of information about a representative collection of food processes with which Clark has had experience; 2) to convey some practical lessons about process development and plant design; and 3) to serve educators as a resource for class problems and discussion.The book is organized in three broad sections. The first concerns processes that are primarily physical, such as mixing. The second concerns processes that also involve biochemical changes, such as thermal sterilization. The third section addresses some broader issues that  have not been discussed elsewhere, including how to tour a plant, how to choose among building a new plant, expanding or renovating; and how to develop processes.J Peter Clark is a Consultant to the Process Industries, residing in Oak Park, Illinois.

Recently, the electrotechnologies based on the effects of pulsed electric fields (PEF), such as ohmic heating (OH) and DC electric field, have gained real interest in the field of food processing. These techniques efficiently enhance methods of extraction from food plants and dehydration of biosolids. The PEF and pulsed OH techniques preserve the nutritional, functional, structural and sensory properties of products better than conventional extraction technologies. The electrofiltration and electro-osmotic dewatering can be very effective for the separation of bioproducts and dehydration of food wastes.The book gives an overview the fundamental principles of electrical techniques, electrophysical properties of foods and agricultural products, application of various emerging electrotechnologies for enhancing the solid-liquid separation and drying processes, extraction techniques of pigments, processing methods of different in-plant tissues and biosolids, electro-osmotic dewatering and electrofiltration of biomaterials, recent industrial- scale gains, and other aspects. Each chapter is complementary to other chapters and addresses the latest efforts in the field.