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George Tchobanoglous was born in the United States to Greek immigrant parents. [3] He received a BS in civil engineering from the University of the Pacific, an MS in sanitary engineering from the University of California, Berkeley, and a PhD in environmental engineering from Stanford University. [2]
Metcalf & Eddy Wastewater Engineering McGraw-Hill (1972) Pomeroy, R.D., 1976, "The problem of hydrogen sulphide in sewers". Published by the Clay Pipes Development Association *Pomeroy's report contains errors in the equation: the pipeline slope (S, p. 8) is quoted as m/100m, but should be m/m.
In 2000, AECOM acquired Metcalf and Eddy, a water and wastewater engineering firm based in Massachusetts, [12] and in September, 2004 it acquired the Canadian company, UMA Engineering Ltd. [13] AECOM went public during May 2007 with an initial public offering on the NYSE, netting $468.3 million. [14]
Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable to discharge to the surrounding environment or an intended reuse application, thereby preventing water pollution from raw sewage discharges. [5]
Wastewater quality indicators are laboratory test methodologies to assess suitability of wastewater for disposal, treatment or reuse. The main parameters in sewage that are measured to assess the sewage strength or quality as well as treatment options include: solids, indicators of organic matter, nitrogen, phosphorus, indicators of fecal ...
Infiltration/Inflow (I/I or I&I) is the process of groundwater, or water from sources other than domestic wastewater, entering sanitary sewers.I/I causes dilution in sanitary sewers, which decreases the efficiency of treatment, and may cause sewage volumes to exceed design capacity.
Secondary treatment (mostly biological wastewater treatment) is the removal of biodegradable organic matter (in solution or suspension) from sewage or similar kinds of wastewater. [ 1 ] : 11 The aim is to achieve a certain degree of effluent quality in a sewage treatment plant suitable for the intended disposal or reuse option.
Metcalf & Eddy / AECOM (2014): “Wastewater is essentially the water supply of a community after it has been used in a variety of applications and which now contains constituents that render it unsuitable for most uses without treatment” Metcalf & Eddy use little the expression ‘sewage’, and employ more ‘domestic wastewater’.