What's Going on In this Basement?

[Seyi A.]

I came across this the other day, looks like the contractor/previous owner has just abandoned his/her renovation of this property. I'm not too familiar with construction, so can anyone help me figure out what they were trying to do with this pipe?  What would it take to finish whatever it was they were trying to do?  Thanks in advance!

https://www.dropbox.com/s/7xz9...

[Account Closed]

The black tank is a sewage ejector pump. The large pipe on the side of the tank is the inlet. One pipe on the top is a vent and the 2nd pipe is attached to the pump. It looks like the large pipe going through the wall on the left side of the sink is the sewer pipe. The sewer is higher than the concrete floor. So, any drains below the sewer pipe going through the wall must be drains into the sewage ejector. 

The sewage water going into the sewage ejector is pumped out of the ejector up high and connected to the pipe going through the wall.

I looks like the sink drain is connected to the pipe going through the wall. If not, it connects to the large pipe going into the sewage ejector.

Not matter how I look at it, the pipe going downward into the concrete floor is not connected properly and sewage water would have to travel uphill and backwards to get into the sewage ejector.  don't have a clue where the pipe goes. It looks like the fittings are installed backwards.

The work overall looks very sloppy and unprofessional.

Is there something that does not work.

Maybe, the basement floors with rain water and they tried to install a hokey system to drain the water to the sewer. I will guess that you will find out when there is a rain storm or after the snow melts.