The company I work for is all residential service, some minor commercial work. The 2 or 3 times we worked on these was awful. Best way I can put it, imagine shitting into a garburator to break everthing down. Now imagine the garburator gets clogged. You clean the waste directly out of the garburator to unclog it. You do the exact same with macerators.

I have only seen my guys so disgusted that badly by one other thing and that was at a slaughterhouse that had cow ears stuck in the pipes.