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The immense environmental challenges facing the world now and in years to come can only be met through marshalling the talents of the best environmental engineers and scientists, and through the use of innovative, cost-effective solutions. Written by three leading aeration experts, Aeration: Principles and Practice, covers the principles and practice of aeration, a unit process critical to the performance of activated sludge treatment and to the budget of wastewater plants.
This reference presents the state of the art in aeration, using examples from a variety of facilities in the USA and Europe. The authors investigate conventional and deep-tank aeration systems for BOD removal and nitrification, as well as high-purity oxygen systems. Operating and capital costs, as well as energy use data are presented together with design information allowing the adaptation of new aeration technologies to plants of diverse size.
Both practitioners and advanced students of wastewater management will appreciate the detailed presentation of oxygen transfer principles, especially as they are illustrated in numerous applications. With the information presented in this book engineers and managers will be able to understand and monitor the efficiency of existing aeration systems and to develop strategies for process improvement.
Antislavery and Abolition in Philadelphia considers the
cultural, political, and religious contexts shaping the long
struggle against racial injustice in one of early America's most
important cities. Comprised of nine scholarly essays by a
distinguished group of historians, the volume recounts the
antislavery movement in Philadelphia from its marginalized status
during the colonial era to its rise during the Civil War.
Philadelphia was the home to the Society of Friends, which
offered the first public attack on slavery in the 1680s; the
Pennsylvania Abolition Society, the western world's first
antislavery group; and to generations of abolitionists who
organized some of early America's most important civil rights
groups.
These abolitionists -- black, white, religious, secular, male,
female -- grappled with the meaning of black freedom earlier and
more consistently than anyone else in early American culture.
Cutting-edge academic views illustrate Philadelphia's antislavery
movement, how it survived societal opposition, and how it remained
vital to evolving notions of racial justice.
Tag Teaming the Press follows Bill and Hillary Clinton's lifelong
association with the media, showing how they have developed and,
over the years, modified thier tactics. This book not only presents
interesting stories about them from reporters' points of view, but
also raises important issues that any civically engaged citizen
will want to explore.
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