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  2. Septic tank - Wikipedia

    en.wikipedia.org/wiki/Septic_tank

    Groundwater pollution, water pollution e.g. during floods [ 1 ] A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic sewage treatment. [ 2 ] Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate ...

  3. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    Each fixture has its own inline trap. A drain-waste-vent system (or DWV) is the combination of pipes and plumbing fittings that captures sewage and greywater within a structure and routes it toward a water treatment system. It includes venting to the exterior environment to prevent a vacuum from forming and impeding fixtures such as sinks ...

  4. Aerobic treatment system - Wikipedia

    en.wikipedia.org/wiki/Aerobic_treatment_system

    Aerobic treatment system. An aerobic treatment system (ATS), often called an aerobic septic system, is a small scale sewage treatment system similar to a septic tank system, but which uses an aerobic process for digestion rather than just the anaerobic process used in septic systems. These systems are commonly found in rural areas where public ...

  5. Why do some Pierce County homeowners have to pay for septic ...

    www.aol.com/news/why-pierce-county-homeowners...

    According to Hemley, he and his colleagues check the amount of sludge at the bottom of the septic tank, the amount of solid waste floating on top and the color of the water in the tank during an ...

  6. Sanitary sewer - Wikipedia

    en.wikipedia.org/wiki/Sanitary_sewer

    A sanitary sewer is an underground pipe or tunnel system for transporting sewage from houses and commercial buildings (but not stormwater) to a sewage treatment plant or disposal. Sanitary sewers are a type of gravity sewer and are part of an overall system called a "sewage system" or sewerage. Sanitary sewers serving industrial areas may also ...

  7. Onsite sewage facility - Wikipedia

    en.wikipedia.org/wiki/Onsite_sewage_facility

    Onsite sewage facilities (OSSF), also called septic systems, are wastewater systems designed to treat and dispose of effluent on the same property that produces the wastewater, in areas not served by public sewage infrastructure. A septic tank and drainfield combination is a fairly common type of on-site sewage facility in the Western world.

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