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Analysis of the buffer system of the C.R.O.P.® -process

Dyck, Birte (2021) Analysis of the buffer system of the C.R.O.P.® -process. Bachelor's, Ruhr-Universität Bochum (RUB), Bochum, Germany.

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Abstract

The C.R.O.P.® -process (Combined Regenerative Organic food Production) was developed at the German Aerospace Center (DLR) as a subsystem for biological regenerative life support systems (BRLSS) and can also be applied on Earth in the sustainable production of fertiliser. The filter is a simply constructed fixed-bed biological filter and is used to recycle nutrients from wastewater such as urine. The microbial process of nitrification provides the basis for the reutilisation of nutrients by plants. The aim of this thesis was the optimization of the operating procedure of the C.R.O.P.® -process. Nitrification is related to the lime-carbon dioxide equilibrium and due to the acidic pH of the C.R.O.P.® -process, the lime-carbon dioxide equilibrium is shifted to the side of carbon dioxide. The insufficiency leads to an incomplete buffering of the process. Despite the incomplete buffering, the process achieves a production of about 80 % nitrate-N. Even without a buffer system, the production of nitrate-N only dropped by 6.84 % during the observed time.

Item URL in elib:https://elib.dlr.de/139823/
Document Type:Thesis (Bachelor's)
Additional Information:First Supervisor: Prof. Dr. Raphael Stoll, Ruhr-Universität Bochum (RUB); Second Supervisor: Dr. rer. nat. Gerhild Bornemann, German Aerospace Center (DLR), Institute of Aerospace Medicine, Gravitational Biology, Cologne
Title:Analysis of the buffer system of the C.R.O.P.® -process
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Dyck, BirteGerman Aerospace Center (DLR), Institute of Aerospace Medicine, Gravitational Biology, CologneUNSPECIFIEDUNSPECIFIED
Date:September 2021
Refereed publication:Yes
Open Access:No
Number of Pages:97
Status:Published
Keywords:C.R.O.P., BRLSS (biological regenerative life support systems), recycling, biowaste, fertilizer, nitrification, buffering systems, pH, mussle shells, marble gravel
Institution:Ruhr-Universität Bochum (RUB), Bochum, Germany
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 - Project C.R.O.P.(R) (:envihab - Live Support Systems IV)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Gravitational Biology
Deposited By: Chiodo, Annette
Deposited On:04 Nov 2021 09:02
Last Modified:04 Nov 2021 09:02

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