Rainbows in the Lehigh Valley Gorge

[TMo]

Sewage treatment....  There's a lot more to pooh gas than you'd think...

I've been working on some basics for the sewage treatment plant which is located between the ACME and the river.  From the satellite pictures, it looks like there was an older plant located to the south of the new one, but I'll only be focusing on the new one which has three "clarifiers".  Clarifiers are the biggest items you see in most sewage treatment plants and are the large circular bins that allow solids to settle out of sewage and allow for oxygenation and some breakdown through biological decomoposition.  There are motors in each clarifier that stir up the wastewater and encourage settling.  Here's a typical cutaway...

   

So, building clarifiers...  I found a piece of 3.75" OD plastic tubing a few years ago and thought it might be useful for something.  Today's the day when I took a handsaw to it and cut three inch and a quarter sections out of it.  Sanded the edges and the exterior and interior surfaces and I think I'll paint them a base coat of light gray and add some additional concrete details later.  They are a bit smaller in scale than the prototype, but I need to start saving some space anyway.


   

Here's a shot from the Rt 940 bridge approaching town and looking south - it's really the only ground level shot I have of the tanks.  My thought is to model the top walkways and the feedwell, but keep each clarifier "full" of liquidish stuff to the scum baffle.  I'm not really sure how I'm going to do this - trial and error once again...