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Microalgae Cultivation at Spaceship EAC for Advanced Life Support Systems

Mauser, Julian (2017) Microalgae Cultivation at Spaceship EAC for Advanced Life Support Systems. Master's, University of Stuttgart.

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Efficient Life Support Systems (LSS) are essential for long-term crewed space missions. In this context, resupply mass is a crucial factor due to immense resulting costs. Resupply mass can be minimized by processing and recycling available goods using regenerative LSS technologies. A specific type of regenerative LSS, called bioregenerative LSS, utilizes biochemical processes. In this study, the C.R.O.P.® filter system and a Photobioreactor (PBR) as two potential parts of a bioregenerative LSS were investigated. The C.R.O.P.® filter system processes synthetic human urine into a fertilizer solution. The fertilizer solution can be used for algae cultivation in a PBR system. Algae conduct photosynthesis and produce edible biomass and oxygen, which can be provided to humans. Investigations in this study focused on the nitrogen supply to the microalgae Chlorella vulgaris by the C.R.O.P.® fertilizer solution. The aim of this study was to evaluate the cultivation of C. vulgaris by use of C.R.O.P.® solution as a nitrogen source. Herein, a fully operational PBR system was put into operation at the Gravitational Biology department of the German Aerospace Center’s Institute of Aerospace Medicine in Cologne. Results of two conducted cultivation experiments with approved nutrition served as data references. The feasibility of using the C.R.O.P.® solution as growth medium for algae cultivation was successfully proved during a third cultivation experiment. The results showed, that algae doubled their biomass within five days, using the C.R.O.P.® solution as a nitrogen source. Future research on algae cultivation using the C.R.O.P.® solution shall be facilitated by an automated interaction between PBR and C.R.O.P.® system. Therefore, a basic concept of automated interaction between the PBR and the C.R.O.P.® system was created.

Item URL in elib:https://elib.dlr.de/117915/
Document Type:Thesis (Master's)
Title:Microalgae Cultivation at Spaceship EAC for Advanced Life Support Systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mauser, Juliangerman aerospace centre (dlr), institute of aerospace medicine, gravitational biology, cologne, germanyUNSPECIFIEDUNSPECIFIED
Date:May 2017
Refereed publication:Yes
Open Access:No
Number of Pages:71
Keywords:Life Support Systems, C.R.O.P., Photobioreactor, Chlorella vulgaris, Algae cultivation, European Astronaut Center (EAC)
Institution:University of Stuttgart
Department:Institute of Space Systems
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Projekt :envihab (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Gravitational Biology
Deposited By: Duwe, Helmut
Deposited On:06 Feb 2018 08:55
Last Modified:06 Feb 2018 08:55

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