DOMESTIC SEWAGE ,RELEASED INTO RIVERS CAUSES
Answers
Answer:
Sewage also contains organic matter that can cause odor and attract flies. Sewage contains nutrients that may cause eutrophication of receiving water bodies; and can lead to ecotoxicity.
Answer:
Sewage, or domestic/municipal wastewater, is a type of wastewater that is produced by a community of people. It is characterized by volume or rate of flow, physical condition, chemical and toxic constituents, and its bacteriologic status (which organisms it contains and in what quantities). It consists mostly of greywater (from sinks, bathtubs, showers, dishwashers, and clothes washers), blackwater (the water used to flush toilets, combined with the human waste that it flushes away); soaps and detergents; and toilet paper (less so in regions where bidets are widely used instead of paper).
Raw sewage arriving at a sewage treatment plant in Syria
Sewage usually travels from a building's plumbing either into a sewer, which will carry it elsewhere, or into an onsite sewage facility (of which there are many kinds). Whether it is combined with surface runoff in the sewer depends on the sewer design (sanitary sewer or combined sewer). The reality is that most wastewater produced globally remains untreated, causing widespread water pollution, especially in low-income countries: a global estimate by UNDP and UN-Habitat is that 90% of all wastewater generated is released into the environment untreated.[1] In many developing countries the bulk of domestic and industrial wastewater is discharged without any treatment or after primary treatment only.
The term sewage is nowadays regarded as an older term and is being more and more replaced by "wastewater".[2] In general American English usage, the terms "sewage" and "sewerage" mean the same thing.[3][4][5] In common English usage, and in American technical and professional English usage, "sewerage" refers to the infrastructure that conveys sewage.[6]