Can’t you just dilute it with more sea water? Basically before releasing it back mix it with sea water at 1:10 or 1:100 ratio and it should not make that much

Can’t you just dilute it with more sea water? Basically before releasing it back mix it with sea water at 1:10 or 1:100 ratio and it should not make that much of a difference. And make the outlet pipe quite far away from the inlet directly into a current if possible so it will mix with the rest of the sea.