Glossary of Water and Wastewater Terms
A B C D E F G H I J K L M N O P Q R S T U V W Y Z5 random terms from our glossary
manhole lid dust pan
A sheet-metal or cast-iron pan located under a manhole lid. This pan serves to catch and hold pebbles and other debris falling through vent holes, preventing them from getting into the pipe system.
pathogens
Organisms, such as bacteria, viruses, protozoa, or internal parasites, that can cause diseases, such as giardiasis, cryptosporidiosis, typhoid fever, cholera, or infectious hepatitis, in a host/person. Also called pathogenic organisms.
estimated contribution
A contribution to a collection system that is estimated rather than computed. The distinction between computed and estimated in such cases is difficult to specify or define. Also see computed contribution.
thermophilic bacteria (thur-moe-FILL-ick)
A group of bacteria that grow and thrive in temperatures above 113°F (45°C). The optimum temperature range for these bacteria in anaerobic decomposition is 120°F (49°C) to 135°F (57°C). Aerobic thermophilic bacteria thrive between 120°F (49°C) and 158°F (70°C).
geology
The science that deals with the origin, history, and structures of the earth, as recorded in the rocks, together with the forces and processes now operating to modify rocks. Also see subsoil geology.
