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[[Image:Arcata-60ft clarifier.jpg|thumb|400px|left|[fig.1] The 60ft diameter primary clarifier tank at the Arcata plant.]]
[[Image:Arcata-60ft clarifier.jpg|thumb|400px|left|[fig.1] The 60ft diameter primary clarifier tank at the Arcata plant.]]
Wastewater treatment clarifiers, also known as sedimentation tanks, are used in wastewater treatment plants to remove solid materials from the water being processed. The waste water treatment plant at the  [http://www.appropedia.org/Arcata_marsh#Arcata.27s_Wastewater_Plant Arcata Marsh] uses two clarifiers, one 26ft diameter tank and one 60ft diameter tank.
Wastewater treatment clarifiers, also known as sedimentation tanks, are used in wastewater treatment plants to remove solid materials from the water being processed. The waste water treatment plant at the  [http://www.appropedia.org/Arcata_marsh#Arcata.27s_Wastewater_Plant Arcata Marsh] uses two clarifiers, one 26ft diameter tank and one 60ft diameter tank[http://www.appropedia.org/Image:Arcata-60ft_clarifier.jpg [Fig.1]].
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Revision as of 20:14, 18 April 2008

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Introduction

[fig.1] The 60ft diameter primary clarifier tank at the Arcata plant.

Wastewater treatment clarifiers, also known as sedimentation tanks, are used in wastewater treatment plants to remove solid materials from the water being processed. The waste water treatment plant at the Arcata Marsh uses two clarifiers, one 26ft diameter tank and one 60ft diameter tank[Fig.1].


Description

[fig.2] The surface skimmer in the 60ft tank.

Clarification tanks work by allowing waste water become still enough for solids to settle to the bottom or float to the surface. Floating solids and oils are skimmed off of the surface by a large rotating arm called the surface skimmer. On the bottom of the tank, which tapers down towards the center, there are rotating arms called scrapers that collect sludge and move it to the outlet at the center of the tank.

File:Clarifier Drawing (800pix).gif
[fig.3] Cross-sectional diagram of a primary clarifier.
[fig.4] Floating solids and oils are deposited into this dumpster after being skimmed off of the surface.


Resources

http://www.humboldt.edu/~smg59/clarifier.html


References

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