The sewage ejector is a smaller number that is actually in the pit, something like a sump pump only the pit is sealed, in the basement that pumps, or ejects the water and waste up to the sewer line to then drain by gravity.
Many houses, like mine, that originally didn't have plumbing in the basement this is used to raise the water to the level of the sewer that is only about four feet under ground. All of the plumbing downstairs, washer, tub/shower, sink, toilet goes into the pit and the pump then ejects it into the sewer.
We are connected to the city sewer and I still wouldn't put paper towels down the toilet. In fact, downstairs I don't flush the T/P down.