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

The influence of nitrogen concentration and precipitation on fertilizer production from urine using a trickling filter

Bornemann, Gerhild and Waßer, Kai and Hauslage, Jens (2018) The influence of nitrogen concentration and precipitation on fertilizer production from urine using a trickling filter. Life Sciences in Space Research (18), pp. 12-20. Elsevier. DOI: 10.1016/j.lssr.2018.04.003 ISSN 2214-5524

[img] PDF
2MB

Official URL: https://doi.org/10.1016/j.lssr.2018.04.003

Abstract

Planetary habitation requires technology to maintain natural microbial processes, which make nutrients from biowaste available for plant cultivation. This study describes a 646 day experiment, in which trickling filters were monitored for their ability to mineralize nitrogen when loaded with artificial urine solutions of different concentrations (40, 60, 80 and 100% v/v). Former studies have indicated that increasing urine concentrations slow nitrogen conversion rates and induce growing instability. In the current experiment, nitrogen conversion rates, measured as nitrate production/day, did not differ between concentration levels and increasing instability was not observed. Instead, the buffering capacity of the mussel shells added as buffer system (∼75% calcium carbonate) increased with increasing concentrations of synthetic urine possibly due to the higher phosphate content. The intensified precipitation of calcium phosphates seems to promote carbonate dissolution leading to improved buffering. For space applications, the precipitation of calcium phosphates is not desirable as for the phosphate to be available to the plants the precipitate must be treated with hazardous substances. With regard to terrestrial agriculture the process-integrated phosphate precipitation is a possibility to separate the macronutrients nitrogen and phosphate without addition of other chemicals. Thus, the described process offers a simple and cost-effective approach to fertilizer production from biogenic residues like slurry.

Item URL in elib:https://elib.dlr.de/120009/
Document Type:Article
Title:The influence of nitrogen concentration and precipitation on fertilizer production from urine using a trickling filter
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bornemann, Gerhildgerman aerospace centre (dlr), institute of aerospace medicine, gravitational biology, cologne, germanyUNSPECIFIED
Waßer, Kaigerman aerospace centre (dlr), institute of aerospace medicine, gravitational biology, cologne, germanyUNSPECIFIED
Hauslage, Jensgerman aerospace centre (dlr), institute of aerospace medicine, gravitational biology, cologne, germanyhttps://orcid.org/0000-0003-2184-7000
Date:2 May 2018
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
DOI :10.1016/j.lssr.2018.04.003
Page Range:pp. 12-20
Publisher:Elsevier
ISSN:2214-5524
Status:Published
Keywords:Life support, Urine, 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
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Gravitational Biology
Deposited By: Duwe, Helmut
Deposited On:03 Jul 2018 13:49
Last Modified:23 Feb 2019 00:22

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.