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  2. Greywater - Wikipedia

    en.wikipedia.org/wiki/Greywater

    Greywater may still have some pathogen content from laundering soiled clothing or cleaning the anal area in the shower or bath. The application of greywater reuse in urban water systems provides substantial benefits for both the water supply subsystem, by reducing the demand for fresh clean water , and the wastewater subsystems by reducing the ...

  3. Drain-waste-vent system - Wikipedia

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

    A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

  4. Grease trap - Wikipedia

    en.wikipedia.org/wiki/Grease_trap

    Waste from passive grease traps and gravity interceptors is called brown grease. Brown grease is rotted food solids in combination with fats, oils, and grease (FOG). Brown grease is pumped from the traps and interceptors by grease pumping trucks. Unlike the collected yellow grease, the majority of brown grease goes to landfill sites. New ...

  5. Pit latrine - Wikipedia

    en.wikipedia.org/wiki/Pit_latrine

    A pit latrine, also known as pit toilet, is a type of toilet that collects human waste in a hole in the ground. [2] Urine and feces enter the pit through a drop hole in the floor, which might be connected to a toilet seat or squatting pan for user comfort. [2]

  6. Mound system - Wikipedia

    en.wikipedia.org/wiki/Mound_system

    The mound system was designed in the 1930s by the North Dakota College of Agriculture. [1] and was known as the Nodak Disposal System.In 1976, the University of Wisconsin studied the design of mound systems as part of the university's Waste Management Project.

  7. Flush toilet - Wikipedia

    en.wikipedia.org/wiki/Flush_toilet

    A washout toilet which holds fecal matter in a shallow depression until flushed. Washout, or Flachspüler ("shallow flush"), toilets have a flat platform with a shallow pool of water. They are flushed by a jet of water from the back that drives waste into the trap below. From there, the water flow removes it into the sewage system.