What to do with astronaut's excrement

The disposal of astronauts' excreta in space is a very important issue, because the disposal of human excreta in space must rely on technical means. The following is how to deal with astronaut excreta:

1. Urine treatment: astronauts' urine is treated by a device called "water recovery system". The device uses a series of filters and chemical reactors to remove pollutants in urine, and finally convert it into reusable water. This water recovery system can enable astronauts to live in space for a long time without needing a large amount of water supply.

2. Stool handling: astronauts' stool handling needs more complex technology. At present, NASA uses a device called "human waste disposal system" to deal with astronauts' feces. The device uses high-temperature and high-pressure steam to decompose feces into water and organic matter. These organics are then converted into fertilizers and used in plant growth experiments. This technology can enable astronauts to live in space for a long time without having to discharge waste.

3. Garbage disposal: Other wastes generated by astronauts in space, such as food packaging, paper towels and other sundries, also need to be disposed. These wastes are usually compressed into solid blocks and stored in space or dropped back to Earth. Some wastes can also be converted into fertilizer or other useful substances.

In a word, the disposal of astronaut excreta in space needs to rely on highly technical equipment and technical means. These technologies can enable astronauts to live in space for a long time without needing a lot of supplies and waste discharge.