Encyclopedia

Sewage collection systems

Sewage collection systems

Configurations of inlets, catch basins, manholes, pipes, drains, mains, holding basins, pump stations, outfalls, controls, and special devices to move wastewaters from points of collection to discharge. The system of pipes and appurtenances is also known as the sewerage system. Wastewaters may be sanitary sewage, industrial wastes, storm runoff, or combined flows.

A sewer is a constructed ditch or channel designed to carry away liquid-conveyed wastes discharged by houses and towns. Modern sewer systems typically are gravity-flow pipelines installed below the ground surface in streets and following the ground slope. The depth of cover over pipelines is controlled by factors such as the location of rock and ground water, the ability to receive flows from all buildings by gravity, depth to frost line, economics of maintaining gravity flow as compared with pumping, and location and elevation of other existing utilities and infrastructures.

Sewerage systems are designed to carry the liquid wastes smoothly, without deposition, with a minimum of wasted hydraulic energy, and at minimum costs for excavation and construction; they should provide maximum capacity for future populations and flows. Engineered construction, controlled by availability of time, material, personnel, and finances, affects the choice and use of individual components within sewerage systems. See Industrial health and safety, Sewage, Sewage disposal

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
Raslan pointed out that the project includes the rehabilitation of nearly 24 existing sewage treatment plants, the expansion of 6 sewage plants, the establishment of one sewage plant and the establishment of a centralised sewage collection systems.
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Suez Advanced Solutions, headquartered in Atlanta, GA, is a professional service and contracting firm dedicated to providing sustainable products and services for potable water distribution systems and sewage collection systems. Suez generated total revenues of USD 18bn in 2016.
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The combination of low permeability and high chemical resistance makes SewerSeal F-170 a strong option for protecting or restoring structures within sewage collection systems. Ultimately this reduces both the amount of sewage to treat and total treatment expense.
Sauereisen
The sulphide formation as a result of reduction of sulphate by the sulphatereducing bacteria Desulphovibrio and Desulphotamaculum [1] is a common process in the sewage collection systems. The intensity of sulphide formation depends on several parameters of sewage, such as the content of organic compounds, sulphate concentration, pH, dissolved oxygen, etc.
Formation of sulphide and its chemical equilibrium in sewage pipes. influence of [H.sub.2]S to aerobic microorganisms of activated sludge
SewerCAD is a design and analysis tool that allows users to layout sanitary sewage collection systems, develop and compute sanitary loads, and simulate the hydraulic response of the entire system-including gravity collection and rising mains.
AUSTRALIAN COMMUNITY SELECTS SEWERCAD FOR SANITARY DESIGN
"Many of the nation's urban sewage collection systems are aging; some sewers are 100 years old.
The EPA has proposed a rule to increase protection for beaches and waterways contaminated by 40,000 raw sewage overflows each year
The Commission justifies referring Austria and Germany to the Court of Justice since despite some improvements in the implementation of the Directive, there are persistent shortcomings with respect to transposing the Directive into national law, meeting deadlines and failing to implement suitable sewage collection systems in some areas.The Court of Justice has ruled against Belgium for failing to comply with the 1991 Directive, which should have been fully implemented by 31 December 1998 at the latest.
ENVIRONMENT: MORE MEMBER STATES IN THE DOCK OVER WASTE WATER DIRECTIVE
Many of the nation's urban sewage collection systems are aging: some sewers are 100 years old.
HDPE pipe and trenchless techniques: hold promise to solve nation's growing infrastructure needs: the net effect of recent advances in trenchless construction, HDPE and fusion technology, is that engineers now have a great deal of confidence in their ability to provide a cost-effective soloution to solve a bold range of piping problems in municipal, industrial, duct and other challenging applications
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