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  2. Diepkloof Rock Shelter - Wikipedia

    en.wikipedia.org/wiki/Diepkloof_Rock_Shelter

    General view of the excavation during 2009 field season Excavation of the upper part of the deposit. Diepkloof Rock Shelter is a rock shelter in Western Cape, South Africa in which has been found some of the earliest evidence of the human use of symbols, in the form of patterns engraved upon ostrich eggshell water containers.

  3. Ultraviolet germicidal irradiation - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet_germicidal...

    The UV dose is measured in light energy per area, i.e. radiant exposure or fluence. The fluence a microbe is exposed to is the product of the light intensity, i.e. irradiance and the time of exposure, according to: UV dose (μJ/cm 2) = UV intensity (μW/cm 2) × exposure time (seconds) [76]

  4. Aponogeton distachyos - Wikipedia

    en.wikipedia.org/wiki/Aponogeton_distachyos

    A. distachyos, habit, showing aerial and submerged parts. It is an aquatic plant growing from a tuberous rhizome.The often mottled leaves float on the water surface from a petiole up to 1 m long from the rhizome; the leaf blade is narrow oval, 6–25 cm long and 1.5–7.7 cm broad, with an entire margin and parallel veins.

  5. City of Johannesburg Metropolitan Municipality - Wikipedia

    en.wikipedia.org/wiki/City_of_Johannesburg...

    Region C - Roodepoort and parts of Randburg (previously, Region 5) Region D - Soweto, Doornkop, Diepkloof and Meadowlands (previously Regions 6 and 10) Region E - Alexandra and parts of Sandton and Rosebank (previously Region 7 and parts of Region 3) Region F - inner city and Johannesburg South (previously Regions 8 and 9)

  6. Sedimentation (water treatment) - Wikipedia

    en.wikipedia.org/wiki/Sedimentation_(water...

    Settling basins and clarifiers can be designed as long rectangles (Figure 1.a), that are hydraulically more stable and easier to control for large volumes. Circular clarifiers (Fig. 1.b) work as a common thickener (without the usage of rakes), or as upflow tanks (Fig. 1.c). [citation needed] Sedimentation efficiency does not depend on the tank ...

  7. Waste stabilization pond - Wikipedia

    en.wikipedia.org/wiki/Waste_stabilization_pond

    The system may consist of a single pond or several ponds in a series, each pond playing a different role in the removal of pollutants. After treatment, the effluent may be returned to surface water or reused as irrigation water (or reclaimed water ) if the effluent meets the required effluent standards (e.g. sufficiently low levels of pathogens ).

  8. Lamella clarifier - Wikipedia

    en.wikipedia.org/wiki/Lamella_clarifier

    Lamella clarifiers are also used in the municipal wastewater treatment processes. [5] The most common wastewater application for lamella clarifiers is as part of the tertiary treatment stage. Lamella clarifiers can be integrated into the treatment process or stand-alone units can be used to increase the flow through existing water treatment ...

  9. Nagarjuna Sagar tail pond - Wikipedia

    en.wikipedia.org/wiki/Nagarjuna_Sagar_tail_pond

    200 Tmcft surplus water annually from the Godavari River is planned to be fed into this tail pond by the Dummugudem Lift Irrigation Scheme which is under execution. The water transferred to this tail pond will be pumped to the upstream 410 Tmcft gross water storage capacity Nagarjuna Sagar reservoir to feed its right and left bank canals.

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