Design and Initial Tests of a Denitrification Composter to Stabilize Space-Mission Trash Dynamac Corporation

Format:

Conference/Event

Author/Creator:

Strayer, Richard F., author.

Conference Name:

International Conference On Environmental Systems (2004-07-19 : Colorado Springs, Colorado, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2004

Summary:

The purpose of this research is to determine the feasibility of a unique denitrifying composter to stabilize trash from space-habitation (STS, ISS, ALS) life support activities. Design criteria were derived from variables to be manipulated and those to be held constant. A pre-existing aerobic composter was used and engineering tests run to ensure that requirements were met. Key experimental variables were identified: NO3- concentration and rate of addition, O2 concentration, mixing duration and frequency, and inoculum. Independent variables were pH, temperature, moisture, C:N ratio, feed material, size reduction, feed addition rate, and mode of operation. Important performance parameters included: maximization of desired outcomes BOD5 removal, CO2 production, waste stabilization, and denitrification and minimization of undesired products N2O, NH3, and volatile organic compounds. Baseline composter operation was with a known solid waste feed: one run was aerobic and two with denitrifying conditions. Inocula were soil or a mixed microbial community enriched under denitrifying conditions. The results indicated the absence of an adequate inoculum

Notes:

Vendor supplied data

Publisher Number:

2004-01-2465

Access Restriction:

Restricted for use by site license