Lara Resman (Avtor), Maja Berden Zrimec (Avtor), Vid Žitko (Avtor), Borut Lazar (Avtor), Robert Reinhardt (Avtor), Ana Cerar (Avtor), Rok Mihelič (Avtor)

Povzetek

In a one-and-a-half-year study conducted in the ALS6 region in Europe (Ljubljana, Slovenia), the cultivation of microalgae in anaerobic digestate from food waste, mainly Scenedesmus dimorphus and Scenedesmus quadricauda, was investigated in three ponds (1260 L each) under a greenhouse. The effects of changing digestate quality and quantity as well as seasonal fluctuations on the productivity of the microalgae were investigated in three stages: Learning/Design (SI), Testing (SII), and Verification/Calibration (SIII). A decision support tool (DST) was developed using easy-to-measure parameters such as pH, temperature, electrical conductivity, mineral nitrogen forms and physical, biological parameters (OD, delayed fluorescence intensity). To control optimal pond operation, we proposed the photosynthetic culture index (PCI) as an early indicator for necessary interventions. Flocculation and nitrite levels (above 3 mg NO$_{2-}N$L$^{−1}$) were signals for the immediate remediation of the algae culture. Under optimal conditions in summer SIII, an average algal biomass production of 11 ± 1.5 g m$^{−2}$ day$^{−1}$ and a nitrogen use efficiency of 28 ± 2.6 g biomass/g N-input were achieved with the developed DST. The developed DST tool was, in this study, successfully implemented and used for the cultivation of microalgae consortia predominated by Scenedesmus dimorphus and S. quadricauda with biogas digestate. DST offers the possibility to be modified according to producers’ specific needs, facility, digestate and climate conditions, and as such, could be used for different microalgae cultivation processes with biogas digestate as a food source.

Ključne besede

circular economy;anaerobic digestion;food waste digestate;microalgae Scenedesmus;open ponds;decision support tool;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL BF - Biotehniška fakulteta
UDK: 63
COBISS: 179545603 Povezava se bo odprla v novem oknu
ISSN: 2071-1050
Št. ogledov: 198
Št. prenosov: 17
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: krožno gospodarstvo;anaerobna presnova;digestat živilskih odpadkov;živilski odpadki;mikroalge;Scenedesmus;odprti ribniki;orodja za podporo odločanju;
Vrsta dela (COBISS): Članek v reviji
Strani: 25 str.
Letnik: ǂVol. ǂ15
Zvezek: ǂIss. ǂ24 (16948)
Čas izdaje: 2023
ID: 22289811