Instrumentation, Control and Automation of Water and Wastewater Treatment and Transport Systems 1993 comprises a selection of manuscripts on the development of control strategies and their applications and on the status and future directions of Instrumentation, Control, and Automation (ICA) in the water and wastewater industry. The book starts by providing an overview of the status, the constraints and the future prospects for ICA in water and wastewater treatment and transport based on the survey responses of experts from 16 different countries. The text continues by presenting the need for dynamic modeling and simulation software to assist operations staff in developing effective instrumentation control strategies and to provide a training environment for the evaluation of such strategies. The book also covers the critical variables in system success; the use of an enterprise-wide computing that emphasizes the importance of strategic planning, performance measures, and human factors associated with the suggested implementation of applied technology; and the use of part-time unmanned operation at a large wastewater treatment plant. A functional approach based on the utility's water and wastewater functional requirements; the collection system monitoring and control; water distribution and control systems; dynamic modeling and simulation; and process control strategy and development are also considered. This book will be beneficial to biochemists, wastewater technologists, and public health authorities.

Technology now affects almost every aspect of Water Supply Management, Operation, Planning and Design; the speed of development means that assessing what is "new" is sometimes difficult. Old ideas can now be applied because of new technology; technology is now revealing problems that were unnoticed 10 years ago. Some emerging technologies promise much but are still underdeveloped for use in real world conditions, while we should always remember that "new" technology depends upon the state of development in respective countries, a point which is particularly relevant to the NATO Advanced Study Institute, for which this book has been produced. Thus our objective in producing the book has been to highlight, in a wide range of technical areas, where and how technology is being applied, what is "new" and what the limitations of these technologies are in the real world. We have also tried to provide an European and American perspective where possible to illustrate how problems are tackled in different cultural environments. It is probably true that "technology" is also somewhat dependent upon the political, economic and organisational climate in different countries and we have included a chapter covering these aspects.

Instrumentation, Control and Automation of Water and Wastewater Treatment and Transport Systems documents the proceedings of the 5th IAWPRC Workshop held in Yokohama and Kyoto, Japan, 26 July-3 August 1990. The papers presented at this Workshop have emphasized the following aspects: • new sensor technology based on developments in electrochemistry, fiber optics, and electro-optics; • research into materials such as those needed to produce membranes of the required selectivity, for immobilization of reactive species, and for addition of reagents and standards; • the use of inferential measurements coupled with expert system technology; • the ever-increasing power of microprocessors and the continuing reduction in their unit costs; • better communications capability; • improved mathematical modeling; • an increased awareness of the improved management that results from the timely availability of relevant data to the appropriate levels in the management hierarchy. This book, together with the proceedings of previous workshops, provides what is probably the most comprehensive account of the state of the art and recent developments in instrumentation, control, and automation as applied to the water and water-using industries, and as such will be invaluable to the practitioner, the researcher, and the student community.

Clearly and comprehensively, this book explains practical problems and potential solutions to those who need to use the latest IT and computing developments to improve efficiency. It will help managers make the most of available resources.

FROM THE PREFACE Dynamic modeling, computer simulation, and modern control systems are valuable tools for use in both the design and operation of dynamic systems. From the "tools" point of view, this book is designed to show practicing engineers how to develop models capable of describing dynamic behavior and how to "solve" these models using computer simulation. The basic principles of process control are also presented so that the effects of different control systems on dynamic behavior can be established by computer simulation.

by Professor Poul Harremoes Environmental engineering has been a discipline dominated by empirical approaches to engineering. Historically speaking, the development of urban drainage structures was very successful on the basis of pure empiricism. Just think of the impressive structures built by the Romans long before the discipline of hydraulics came into being. The fact is that the Romans did not know much about the theories of hydraulics, which were discovered as late as the mid-1800s. However, with the Renaissance came a new era. Astronomy (Galileos) and basic physics (Newton) started the scientific revolution and in the mid-1800s Navier and Stokes developed the application of Newtons laws to hydrodynamics, and later, St. Venant the first basic physics description of the motion of water in open channels. The combination of basic physical understanding of the phenomena involved in the flow of water in pipes and the experience gained by "trial and error", the engineering approach to urban drainage improved the design and performance of the engineering drainage infrastructure. However, due to the mathematical complications of the basic equations, solutions were available only to quite simple cases of practical significance until the introduction of new principles of calculation made possible by computers and their ability to crunch numbers. Now even intricate hydraulic phenomena can be simulated with a reasonable degree of confidence that the simulations are in agreement with performance in practice, if the models are adequately calibrated with sample performance data.