elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Natural microbial populations in a water-based biowaste management system for space life support

Bornemann, Gerhild and Waßer, Kai and Tonat, Tim and Moeller, Ralf and Bohmeier, Maria and Hauslage, Jens (2015) Natural microbial populations in a water-based biowaste management system for space life support. Life Sciences in Space Research, 7, pp. 39-52. Elsevier. DOI: 10.1016/j.lssr.2015.09.002 ISSN 2214-5524

[img] PDF
2MB

Official URL: http://dx.doi.org/10.1016/j.lssr.2015.09.002

Abstract

The reutilization of wastewater is a key issue with regard to long-term space missions and planetary habitation. This study reports the design, test runs and microbiological analyses of a fixed bed biofiltration system which applies pumice grain (16–25 mm grain size, 90 m²/m³ active surface) as matrix and calcium carbonate as buffer. For activation, the pumice was inoculated with garden soil known to contain a diverse community of microorganisms, thus enabling the filtration system to potentially degrade all kinds of organic matter. Current experiments over 194 days with diluted synthetic urine (7% and 20%) showed that the 7% filter units produced nitrate slowly but steadily (max. 2191 mg NO₃–N/day). In the 20% units nitrate production was slower and less stable (max. 1411 mg NO₃–N/day). 84% and 76% of the contained nitrogen was converted into nitrate. The low conversion rate is assumed to be due to the high flow rate, which keeps the biofilm on the pumice thin. At the same time the thin biofilm seems to prevent the activity of denitrifiers implicating the existence of a trade off between rate and the amount of nitrogen loss. Microbiological analyses identified a comparatively low number of species (26 in the filter material, 12 in the filtrate) indicating that urine serves as a strongly selective medium and filter units for the degradation of mixed feedstock have to be pre-conditioned on the intended substrates from the beginning.

Item URL in elib:https://elib.dlr.de/99908/
Document Type:Article
Title:Natural microbial populations in a water-based biowaste management system for space life support
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bornemann, GerhildGerman Aerospace Center, Institute of Aerospace Medicine, Gravitational Biology, Linder Hoehe, 51147 Cologne, Germany; gerhild.bornemann (at) dlr.deUNSPECIFIED
Waßer, KaiGerman Aerospace Center, Institute of Aerospace Medicine, Gravitational Biology, Linder Hoehe, 51147 Cologne, GermanyUNSPECIFIED
Tonat, TimGerman Aerospace Center, Institute of Aerospace Medicine, Gravitational Biology, Linder Hoehe, 51147 Cologne, GermanyUNSPECIFIED
Moeller, RalfGerman Aerospace Center, Institute of Aerospace Medicine, Radiation Biology, Linder Hoehe, 51147 Cologne, GermanyUNSPECIFIED
Bohmeier, MariaGerman Aerospace Center, Institute of Aerospace Medicine, Radiation Biology, Linder Hoehe, 51147 Cologne, GermanyUNSPECIFIED
Hauslage, JensGerman Aerospace Center, Institute of Aerospace Medicine, Gravitational Biology, Linder Hoehe, 51147 Cologne, GermanyUNSPECIFIED
Date:2015
Journal or Publication Title:Life Sciences in Space Research
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:7
DOI :10.1016/j.lssr.2015.09.002
Page Range:pp. 39-52
Publisher:Elsevier
ISSN:2214-5524
Status:Published
Keywords:Life support; Urine; Nutrient recycling; Waste management; Biofilter; Nitrification
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Projekt :envihab, R - Project eu:cropis, R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Biomedical Research
Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:02 Dec 2015 14:16
Last Modified:31 Jul 2019 19:56

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.