Related Experiment Video
Updated: Aug 7, 2025
05:58
Deposition of Porous Sorbents on Fabric Supports
Published on: June 12, 2018
6.6K
Mechanical compression assisted heat drying of space solid waste: Dewatering performance and volatile pollutants
Hui Jiang1, Xiang Liu2, Junfeng Zhang1
1School of Resources and Environment, Xiangtan University, Xiangtan, 411105, Hunan, China.
Environmental Research
|March 10, 2023
Summary
Hot melt compression effectively dewaters space waste by combining heat and pressure, reducing moisture by 95.5%. The recovered water is reusable, though halohydrocarbons are identified as pollutants.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Space missions generate solid waste, posing challenges for resource management and crew safety.
- Traditional dewatering methods for space waste are often energy-intensive and inefficient.
Purpose of the Study:
- To investigate the efficacy of hot melt compression for dewatering space solid waste.
- To analyze the characteristics of the dewatered product and condensed water.
- To assess gaseous emissions and identify potential pollutants.
Main Methods:
- A novel hot press experimental setup was designed and utilized.
- Space solid waste was treated at temperatures ranging from 130-180 °C and mechanical loads of 0-8 MPa.
- Dewatering efficiency, product distribution, water reusability, and chemical evolution of gaseous products were analyzed.
Main Results:
- Hot melt compression achieved a maximum moisture content reduction of 95.5%.
- Optimal dewatering was observed at 160 °C, 6 MPa, with a 100-minute residence time.
- Condensed water showed potential for reuse as drinking water; oxygen-containing functional groups were primary gas products, with halohydrocarbons identified as key pollutants.
Conclusions:
- Hot melt compression is a promising low-energy technology for space solid waste treatment.
- The process facilitates efficient water recovery and potential water reuse.
- Understanding gaseous emissions is crucial for process optimization and environmental safety in space.
Related Concept Videos
01:10Volatilization
428
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
428
01:03Sublimation
796
Sublimation is the direct transformation of a solid to a gaseous state. For instance, at standard pressure and room temperature, solid carbon dioxide sublimes to gaseous carbon dioxide. The phase diagram depicts the conditions required for sublimation. This process occurs at the solid-gas phase boundary and is not observed above the triple point of the substance. The reverse of sublimation is called deposition, where a gaseous substance condenses directly into a solid. Sublimation and...
796