Question

----- is used in space travel to get rid of CO2 and decompose human wastes.​

Answer 1

Answer:

They found the process could produce 290 liters of methane per crew per day, all produced in a week, Pullammanappallil said. Their results led to the creation of a process that uses an anaerobic digester. That process kills pathogens from human waste, and produces biogas -- a mixture of methane and carbon dioxide.

Answer 2

Answer:

In space travel, chlorella pyrenoidosa is used to remove carbon dioxide and decompose human waste.

Explanation:

• Chlorella pyrenoidosa, a type of freshwater green algae, can help astronauts get rid of $CO_2$ and recycle other wastes while in space. The algae reproduce quickly, utilising $CO_2$ and liberating $O_2$ during photosynthesis. It produces $N_2$ for protein synthesis by decomposing human urine and faeces.
• Algae's main function is to produce oxygen, consume carbon dioxide exhaled by humans, and convert nitrogen-rich wastes.