Cirkulär näringsåtervinning: Kväve och fosfor från avloppsvatten till fiskfoder genom mikroalger och bakterier
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Publicerad
Typ
Examensarbete på kandidatnivå
Bachelor Thesis
Bachelor Thesis
Program
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This thesis examines the implementation of fish feed production through growth of
bacterial and micro algal biomass with nutrients from wastewater at a treatment
facility. In order to investigate this, a study with supporting calculations was con ducted to determine the energy and land usage necessary for the introduction of
such a production processes. This was achieved through analysing relevant articles
and studies. Furthermore the study examines the optimal point in a wastewater tre atment facility at which such a production process should be implemented. This was
done by experimentally determining which form of nitrogen bacteria and microalgae
prefer for optimal growth.
The results of this study show that the application of bacterial growth using nutrients
from wastewater is significantly more efficient in terms of land and energy use. The
experimental results show that this type of system should be implemented after the
nitrification step in the wastewater treatment process to ensure optimal bacterial
growth.
The findings of the study highlight the future potential of using bacterial biomass
for fish feed production. Its low energy and land requirements make implementation
of bacterial biomass production a relevant focus for future research in recycling of
wastewater nutrients.
Beskrivning
Ämne/nyckelord
Wastewater treatment, Fish feed, Microalgae cultivation, Bacteria cultivation