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  2. Koi pond - Wikipedia

    en.wikipedia.org/wiki/Koi_pond

    Bottom drains are not required in water gardens but are very beneficial for Koi Ponds. When used in a pond that does or does not have rocks on the bottom, a bottom drain allows the heavy solids to be carried to the mechanical filter. In addition, many bottom drains are equipped with air diffusers, adding much needed oxygen to a pond. And ...

  3. Waste stabilization pond - Wikipedia

    en.wikipedia.org/wiki/Waste_stabilization_pond

    Anaerobic ponds allow solids to settle down at the bottom as sludge. This settling removes a portion of the particulate organic material. [14] A large fraction of the settled solids will accumulate close to the point where wastewater enters the pond. Therefore, anaerobic ponds must be designed to be far deeper than either aerobic or facultative ...

  4. 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.

  5. Sanitary sewer - Wikipedia

    en.wikipedia.org/wiki/Sanitary_sewer

    Stoneware sanitary sewer (bottom) submerged in trash and fecalia. Sanitary sewer overflow can occur due to blocked or broken sewer lines, infiltration of excessive stormwater or malfunction of pumps. In these cases untreated sewage is discharged from a sanitary sewer into the environment prior to reaching sewage treatment facilities. To avoid ...

  6. Anabas cobojius - Wikipedia

    en.wikipedia.org/wiki/Anabas_cobojius

    Anabas cobojius, the Gangetic koi, popularly known as Koi in Bengali, is a species of climbing gourami native to Bangladesh and India, where it occurs in many types of standing water bodies. This species reaches a total length of 30 cm (12 in) and is carnivorous, feeding on water invertebrates and their larvae.

  7. Retention basin - Wikipedia

    en.wikipedia.org/wiki/Retention_basin

    Storm water is typically channeled to a retention basin through a system of street and/or parking lot storm drains, and a network of drain channels or underground pipes.. The basins are designed to allow relatively large flows of water to enter, but discharges to receiving waters are limited by outlet structures that function only during very large storm eve

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