When I worked at a place that had toilet silo, a bloke would come to suck it all out with a tanker. One day there was a blockage caused by sanitary products the had blocked the manhole leading to the tank.. Said bloke came, rolled up his shirt sleeve and stuck his arm full length int said manhole to stir it up and move the exit blockage. Most of the nearby workers ran off with their hands over their mouth. Can't see the problems myself.. Later in life I had to deal with the same stuff coming out of patients live and hot. somebody had to clear it up and tend to them at the same time.