Microwave Enhanced Freeze Drying of Solid Waste Project

Metadata Updated: July 8, 2015

Development of technology for Microwave Enhanced Freeze Drying of Solid Waste (MEFDSW) is proposed. The present state of the art for solid waste stabilization using lyophilization is very effective at removing water (up to 99.9[HTML_REMOVED]), but suffers from long processing times and high specific energy, because system equipment must operate continuously over the duration of the process. For conventional freeze drying operations, the system vacuum pump and the heat transfer system are in continuous operation. By utilizing microwave power to provide the necessary phase change energy to convert solid water to water vapor via sublimation at low pressure and temperature, the conductive heat transfer rate limitation that plagues conventional freeze dryers can be short-circuited. In addition, since the product quality of the dried solid waste is less of an issue than for food and pharmaceutical products, the sublimation envelope can be pushed. If the eutectic temperature is exceeded in localized regions in the solid waste during processing and partial melting to liquid water occurs in these regions, little significant impact, if any, will be made on the final state of the dried solid waste, but the rate of drying may be greatly accelerated, making the overall process more efficient.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date April 9, 2015
Metadata Updated Date July 8, 2015

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date April 9, 2015
Metadata Updated Date July 8, 2015
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_5212
Richard Wheeler
Maintainer Email
Id {$oid: 55942a90c63a7fe59b4988ad}
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id bec95d32-f67d-4098-9b0b-03f788c44289
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2004-01-01T00:00:00Z
Homepage URL http://techport.nasa.gov/view/5212
Language en-US
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2015-03-12
Program Code 026:027
Publisher Hierarchy National Aeronautics and Space Administration > Space Technology Mission Directorate
Related Documents http://techport.nasa.gov/home, http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf, http://techport.nasa.gov/fetchFile?objectId=6561, http://techport.nasa.gov/fetchFile?objectId=3456, http://techport.nasa.gov/fetchFile?objectId=3447, http://techport.nasa.gov/fetchFile?objectId=6584, http://techport.nasa.gov/fetchFile?objectId=6560, http://techport.nasa.gov/fetchFile?objectId=3448
Source Datajson Identifier True
Source Hash 60ecdb5f2d197f7eca2f76c605b0cb4f09873780
Source Schema Version 1.1
Temporal 2004-01-01T00:00:00Z/2004-07-01T00:00:00Z

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