Palevsky, Gerald Consulting Professional Engineer, Hastings-on-Hudson, New York.
Last reviewed:April 2019
Show previous versions
- Preliminary treatment
- Primary treatment
- Secondary treatment
- Fixed-film systems
- Activated sludge
- Final polishing
- Advanced wastewater treatment
- Links to Primary Literature
- Additional Readings
The process of separating, modifying, removing, and destroying objectionable, hazardous, and pathogenic substances from sewage, also known as wastewater. The used water supply of a community, if left untreated, carries a variety of health risks (Fig. 1). Stringent state, federal, and local water quality and effluent standards require reduction of suspended solids (turbidity), biochemical oxygen demand (related to degradable organics), and coliform organisms (indicators of fecal pollution), as well as the control of pH and the concentration of toxic organic chemicals and heavy metals from sewage in order to render the water safe for human consumption. Ultimately, the impurities, contaminants, and solids removed by sewage treatment processes must also be collected, handled, and disposed of safely, without damage to human health or the environment. See also: Sewage
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information