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Start-up of a nutrient removal system using Scenedesmus vacuolatus and Chlorella vulgaris biofilms
Ist Teil von
Bioresources and bioprocessing, 2019-07, Vol.6 (1), p.1-16, Article 27
Ort / Verlag
Singapore: Springer Singapore
Erscheinungsjahr
2019
Link zum Volltext
Quelle
EZB Free E-Journals
Beschreibungen/Notizen
Microalgal biofilm-based technologies are of strong interest due to their high biomass concentrations and ability to remove nutrients from wastewater, utilize CO
2
and produce secondary valuable products. This study investigated the biomass production and nutrient removal efficiency of the microalgae
Scenedesmus vacuolatus
ACUF_053 and
Chlorella vulgaris
ACUF_809 from a synthetic wastewater, describing a start-up process in a new biofilm photobioreactor (PBR) configuration. Two sets of experiments were performed. The first one compared the performance of a suspended and attached cell system under batch conditions. The second set of experiments was addressed under semi-batch conditions to study the microalgae biofilm development in the PBR. Five stages in the development of the biofilm were identified for
S. vacuolatus
: attachment, biofilm formation, maturation I, adaptation and maturation II. The biofilm development phases had a different nutrient removal efficiency.
S. vacuolatus
biofilm showed a higher phosphate demand during the first attachment and formation phases, while it had a higher nitrate demand during the subsequent phases.
C. vulgaris
biofilm formation was affected by the pH increase (up to 10.6). The biofilm PBR design using both
S. vacuolatus
and
C. vulgaris
showed potential for wastewater treatment due the higher nutrient removal rates.