Launder channel cover with independently openable panel members

1. A cover arrangement for a launder channel of a clarifier tank, said clarifier tank having a tank wall, a launder channel and a weir wall, said cover arrangement comprising:

at least one mounting section attachable to the clarifier tank near the launder channel; and

a plurality of cover panel members, each panel member having a horizontal planar surface and two perpendicular stiffening flanges located on opposing lateral edges of said surface extending downwardly at a substantially 90 degree angle, said stiffening flanges of said cover panel members forming planar surfaces for facing opposing stiffening flanges on adjacent cover panel members in a substantially parallel manner, where each of said cover panel members further includes a light seal either one of attached to or attached near one of said stiffening flanges,

wherein said cover arrangement includes arranging said plurality of cover panels around the clarifier tank over said launder channel such that said light seal attached to or near one of said planar surfaces facing opposing stiffening flanges of a said stiffening flange of a first panel member among said plurality of panel members abuts against a planar surfaces of a stiffening flange of an adjacent second panel member among said plurality of panel members.

2. The cover arrangement as claimed in claim 1 , further comprising a plurality of mounting sections coupled to the clarifier tank near the launder channel.

3. The cover arrangement as claimed in claim 2 , wherein said plurality of mounting sections are coupled to the clarifier tank on the tank wall near the launder channel.

4. The cover arrangement as claimed in claim 2 , wherein said plurality of mounting sections are coupled to the clarifier tank on the weir wall near the launder channel.

5. The cover arrangement as claimed in claim 2 , wherein each of said plurality of panel members is mounted each to its own one of said plurality′ of mounting sections.

6. The cover arrangement as claimed in claim 1 , wherein said stiffening flanges located on opposing lateral edges of said surface extend downward approximately 2″.

7. The cover arrangement as claimed in claim 1 , wherein said light seal is selected from the group consisting of a rubber bulb gasket, a rubber flap and a rubber, shaped gasket.

8. The cover arrangement as claimed in claim 1 , wherein a plurality of adjacent cover panels entirely surround the launder channel of the clarifier tank.

9. The cover arrangement as claimed in claim 8 , wherein, between each of said cover panels, there is a gap between a first edge of said first panel at one of its stiffening flanges, and a second edge of a second adjacent panel at one of its stiffening flanges.

10. The cover arrangement as claimed in claim 9 , wherein said light seal on said first cover panels at said stiffening flange substantially seals said gap between said first edge of said first panel and said second edge of a second adjacent panel.

11. A cover arrangement for a launder channel of a clarifier tank, said clarifier tank having a tank wall, a launder channel and a weir wall, said cover arrangement comprising:

at least one mounting section attachable to the clarifier tank near the launder channel; and

a plurality of cover panel members, each panel member having a horizontal planar surface and two perpendicular stiffening flanges located on opposing lateral edges of said surface extending downwardly at a substantially 90 degree angle, said stiffening flanges of said cover panel members forming a planar surfaces for facing opposing stiffening flanges on adjacent cover panel members in a substantially parallel manner, where each of said cover panel members further includes light seals, either one of attached to or attached near each of said stiffening flanges,

wherein said cover arrangement includes arranging said plurality of cover panels around the clarifier tank over said launder channel such that said light seals attached to or near one of said planar surfaces facing opposing stiffening flanges of a said stiffening flanges of a first panel member among said plurality of panel members abuts against said light seals on said planar surfaces of stiffening flanges of an adjacent second panel member among said plurality of panel members.