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2. Septic tank - Wikipedia

   en.wikipedia.org/wiki/Septic_tank

   A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater flows for basic sewage treatment. [2] Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment"). [2]

3. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

4. Sewage treatment - Wikipedia

   en.wikipedia.org/wiki/Sewage_treatment

   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. [2]

5. Activated sludge - Wikipedia

   en.wikipedia.org/wiki/Activated_sludge

   Activated sludge tank at Beckton sewage treatment plant, UK.The white bubbles are due to the diffused air aeration system. The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa.

6. Water supply and sanitation in Lebanon - Wikipedia

   en.wikipedia.org/wiki/Water_supply_and...

   According to UN estimates that are not based on any household survey, access to an improved water source in Lebanon is universal. [1] The UN figures on water access may not give an accurate picture of the real situation: A representative survey carried out by the World Bank in 2008 estimated that the average connection rate to the public water network was 80%, varying from 96% in Beirut to 55% ...

7. Arizona - Wikipedia

   en.wikipedia.org/wiki/Arizona

   This is an accepted version of this page This is the latest accepted revision, reviewed on 29 January 2025. U.S. state This article is about the U.S. state. For other uses, see Arizona (disambiguation). State in the United States Arizona State Flag Seal Nicknames: The Grand Canyon State; The Copper State; The Valentine State Motto: Ditat Deus ('God enriches') Anthem: "The Arizona March Song ...