sewage is mostly water, you can treat it if you need to. Canterbury tratment plant puts the treated waste back in to the River Stour, when it gets to Plucks Gutter they pump it back out.
Thanet takes it to Foreness Point, then pumps it to Richborough treats it a Little bit then pumps it back to Foreness Point, then dumps it in the sea through a new longer outfall pipe. Ask yourselve why does the pipe have to be longer, have they really treated it at all. Why waste all this water when were are so short of it.