The new science of ecological engineering is winning increasing acceptance all over the world. Established industrial economies like Sweden and the United States are investing more in it as initial skepticism and regulatory hurdles are giving way to burgeoning investments by companies and municipalities, increased research activity, and great interest by the public. Less-developed countries are investigating inexpensive and effective ways to build their wastewater treatment infrastructure with ecological engineering. Eastern European countries and the former Soviet Union are turning to ecological engineering to solve their acute pollution problems. Ecological Engineering for Wastewater Treatment, Second Edition, presents comprehensive coverage of topics ranging from wastewater source separation at the household level to the use of huge, natural wetlands. It is an updated description of the state of the art, intended as a tool for teaching and inspiring the management of wastewater as a resource, one of the keys to sustainable development. In this Second Edition, existing chapters have been updated, new chapters have been added, and a comprehensive index has been added.