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  2. Aerobic treatment system - Wikipedia

    en.wikipedia.org/wiki/Aerobic_treatment_system

    The aeration stage and the disinfecting stage are the primary differences from a traditional septic system; in fact, an aerobic treatment system can be used as a secondary treatment for septic tank effluent. [1] These stages increase the initial cost of the aerobic system, and also the maintenance requirements over the passive septic system.

  3. Water aeration - Wikipedia

    en.wikipedia.org/wiki/Water_aeration

    Coarse bubble aeration is a type of subsurface aeration wherein air is pumped from an on-shore air compressor. [ 6 ] through a hose to a unit placed at the bottom of the water body. The unit expels coarse bubbles (more than 2mm in diameter), [ 7 ] which release oxygen when they come into contact with the water, which also contributes to a ...

  4. Wastewater treatment - Wikipedia

    en.wikipedia.org/wiki/Wastewater_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. [5]

  5. Activated sludge - Wikipedia

    en.wikipedia.org/wiki/Activated_sludge

    Surface aerator for aeration tank at activated sludge sewage treatment plant (at Morro Alto Treatment Plant, Vespasiano, Brazil) Vertically mounted tubes of up to 1-metre (3.3 ft) diameter extending from just above the base of a deep concrete tank to just below the surface of the sewage liquor. A typical shaft might be 10 metres (33 ft) high.

  6. Pregnant Woman Reportedly Stabbed 14 Times by Pizza Delivery ...

    www.aol.com/pregnant-woman-reportedly-stabbed-14...

    A pregnant woman is recovering in the hospital after she was stabbed multiple times by a pizza delivery driver over the size of her tip, according to reports. The incident happened on Sunday, Dec ...

  7. The gambling industry's sly new way to suck money from ... - AOL

    www.aol.com/news/gambling-industrys-sly-way-suck...

    The gambling industry, much like AI, is in the middle of an unprecedented gold rush. In 2018, a US Supreme Court ruling allowed states to legalize sports betting; nearly 40 states since did ...

  8. Missing hiker attempting to climb Mount Whitney in California ...

    www.aol.com/missing-hiker-attempting-climb-mount...

    A hiker, who was reported missing in California's Sierra Nevada mountains in the last week of December, was found dead at an elevation of 12,000 feet, officials say. "At this time, no further ...

  9. Sewage sludge treatment - Wikipedia

    en.wikipedia.org/wiki/Sewage_sludge_treatment

    However, the operating costs are characteristically much greater for aerobic digestion because of energy used by the blowers, pumps and motors needed to add oxygen to the process. However, recent technological advances include non-electric aerated filter systems that use natural air currents for the aeration instead of electrically operated ...

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