sewage


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sewage

[′sü·ij]
(civil engineering)
The fluid discharge from medical, domestic, and industrial sanitary appliances. Also known as sewerage.

Sewage

Water-carried wastes, in either solution or suspension, that flow away from a community. Also known as wastewater flows, sewage is the used water supply of the community. It is more than 99.9% pure water and is characterized by its volume or rate of flow, its physical condition, its chemical constituents, and the bacteriological organisms that it contains. Depending on their origin, wastewaters can be classed as sanitary, commercial, industrial, or surface runoff.

The spent water from residences and institutions, carrying body wastes, ablution water, food preparation wastes, laundry wastes, and other waste products of normal living, are classed as domestic or sanitary sewage. Liquid-carried wastes from stores and service establishments serving the immediate community, termed commercial wastes, are included in the sanitary or domestic sewage category if their characteristics are similar to household flows. Wastes that result from an industrial process or the production or manufacture of goods are classed as industrial wastes. Their flows and strengths are usually more varied, intense, and concentrated than those of sanitary sewage. Surface runoff, also known as storm flow or overland flow, is that portion of precipitation that runs rapidly over the ground surface to a defined channel. Precipitation absorbs gases and particulates from the atmosphere, dissolves and leaches materials from vegetation and soil, suspends matter from the land, washes spills and debris from urban streets and highways, and carries all these pollutants as wastes in its flow to a collection point. Discharges are classified as point-source when they emanate from a pipe outfall, or non-point-source when they are diffused and come from agriculture or unchanneled urban land drainage runoff.

Wastewaters from all of these sources may carry pathogenic organisms that can transmit disease to humans and other animals; contain organic matter that can cause odor and nuisance problems; hold nutrients that may cause eutrophication of receiving water bodies; and may contain hazardous or toxic materials. Proper collection and safe, nuisance-free disposal of the liquid wastes of a community are legally recognized as a necessity in an urbanized, industrialized society. See Sewage treatment

sewage

Any liquid-borne waste, containing animal or vegetable matter in suspension or solution; may include liquids containing chemicals in solution; ground, surface, or storm water may become mixed with it as it is admitted into or passes through the sewers.
References in periodicals archive ?
A special sewage removal truck the company is offering claims to employ advanced electronic technology to pump out sewage in a way that is also environmentally friendly.
To address the issue of sewer connectivity, the works on laying of 12 km sewer lines and rehabilitation of existing pumping stations are also part of the above project to improve the entire sewage management infrastructure in Rishikesh.
Up to 20,000 houses have been connected to the sewage network across the emirate whereas Fewa has up to 85,000 subscribers all over the emirate.
There has been a limited study in triticale production with sewage sludge application by testing whether sewage sludge can be substituted for inorganic mineral fertilizers or not.
Jurf Al-Gharbi is a well known district in Madinah and we'll implement the sewage project as quickly as possible.
The second project or phase is implementing the new sewage system in Discovery Gardens and JLT which will result in the redirection of the sewage water to the Jebel Ali station to avoid future incidents and inconvenience for residents of the area," he said.
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Work is still in progress to build sewage treatment plants in East Hidd on the Dry Dock Highway and the needed sub networks in different areas.
The metro wastewater agency's idea was to have Delta and Knife River use treated sewage instead, and for the companies to let the sewage seep into Delta's gravel pits and percolate into the ground.
The Sewage Works Exhibition supports the expansion of Japanese water business to overseas markets.
This year marks the exhibition's 26th edition and 323 companies, including many from abroad, will present cutting-edge technology and equipment featuring the latest in design and inspection, construction, sewer and equipment, sewage disposal, operation and maintenance, and other developments.