By treating the waste before letting the water go back into the environment. the reason this is not done properly is because the average person will not vote for the officials that would make them pay to have this done because everyone wants a free ride.
You could do that but you would need a trap to stop sewer gas from coming in. The toilet has the trap integrated into it. If you have access to underneath then you could add one.
A toilet is used for getting rid of body waste.
The laundry waste pipe is fitted to the main drain near the toilet and the main pipe down the line past toilet is partly plugged, forcing the laundry waste up the toilet waste tube. You need to auger the pipe from toilet to outside. If all the piping is in ground you will have to remove toilet from floor to do this properly.
Only human waste and toilet paper. NOTHING else.
The problem of having waste accumulating in the toilet.
Flush it down the toilet, or you can throw it out.
Water and waste
recycle
Most people recommend getting a toilet that does not have splashback in order to prevent a person's waste and waste filled water from splashing on them when they use the toilet.
they pee in the ship with no toilet
to get rid of body waste
Yes, you can.