Linn Solli
Forsker
Biografi
Utdanning/kompetanse: Doktorgrad (PhD) (2017) i mikrobiologi ved Universitetet for miljø- og biovitenskap, NMBU.
Min forskning omhandler:
- Blå/grønn bioøkonomi (landbruk / havbruk / akvakultur)
- Klima- og miljøvennlig håndtering av organiske restfraksjoner
- Anaerob nedbrytning av organiske fraksjoner (husdyrgjødsel, fiskeslam, slakteriavfall etc)
- Biogassprosess og metanproduksjon
- Dynamikk i anaerobe mikrobiologiske samfunn
- Toleranse for nitrogen (ammoniakk) og fettsyrer (LCFA / VFA) i anaerobe mikrobiologiske samfunn
- Syntrofiske forhold mellom ulike grupper bakterier og metanogene Arker
På Ås har vi Norges største biogasslaboratorie, med utstyr og instrumenter for ulike typer biogassforsøk (eks. potensialtester, langvarige kontinuerlige biogassforsøk, analyser av gass og organisk materiale). Laboratoriet har også fasiliteter for mikroalgeforsøk, komposteringsforsøk og en rekke forskjellige analyser.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Marine aquaculture sludge is a significant side stream from the aquaculture industry and represents a promising substrate for biogas production. In this study, the performance of two lab-scale continuous biogas reactors was investigated when feeding increased amounts of marine aquaculture sludge (MAS) in mix with cow manure (CM) over a period of 340 days. The MAS volume was gradually increased from 20% to 100%, increasing the biogas yield from approx. 200 to 400 mL/g COD/d. The content of NaCl in the feedstock was 25 g/L when feeding 100% MAS. Microbial community analysis (16S rRNA gene amplicon sequencing) revealed that most archaeal OTUs detected at high MAS loading were associated with acetoclastic Methanothrix and Methanosarcina genera. Increasing the MAS load was associated with reduced microbial diversity, yet no distinct MAS-specific species emerged as key drivers in the recovered microbial community. Our results highlight the great potential of MAS as a substrate for biogas production and the possibility to establish biogas systems with salinity conditions corresponding to sea water.
Forfattere
Abdullah Bugra Senol Linn Solli John Morken Wietske Annechien Stel Nazli Pelin Kocatürk SchumacherSammendrag
Aquaculture sludge from recirculating aquaculture systems (RAS) represents a growing waste stream with potential for biogas recovery; however, elevated salinity can inhibit anaerobic digestion (AD). This study evaluated the biochemical methane potential (BMP) of RAS sludge under freshwater (0%), brackish (1.2%), and marine (3.3%) conditions and assessed the effectiveness of biochar and zeolite. Batch BMP assays were conducted under mesophilic conditions at an inoculum-to-substrate ratio of 2:1, with additives applied at 0.8 g/g VS. Increasing salinity significantly reduced methane yields (p < 0.05), from 533.6 ± 3.4 NmL CH4/g VS in freshwater to 478.1 ± 10.2 and 341.3 ± 0.6 NmL CH4/g VS in brackish and marine conditions, respectively. Biochar enhanced methane production by 5.9–11.3% across all salinities, while zeolite increased yields by 7.7% and 15.7% under brackish and marine conditions, respectively, but had no effect in freshwater. Methane production kinetics were well described by the modified Gompertz model (R2 = 0.983–0.999). Overall, biochar was more effective at low salinity levels, whereas zeolite mitigated salinity-induced inhibition, indicating that targeted additive application can enhance methane recovery from saline aquaculture sludge and support sustainable RAS waste management.
Divisjon for miljø og naturressurser
CIRCULIZER - Biorest fra marine restråstoffer
I dette prosjektet undersøker vi biorest produsert fra marine restråstoffer. Hvordan påvirker fiskeslam og fiskeensilasje biogassprosessen, gjødseleffekten, miljøgevinster og hva skal til for at biorest faktisk blir tatt i bruk som gjødsel?
Divisjon for miljø og naturressurser
SUFFICIENT
SUFFICIENT is a highly innovative and industry driven collaboration project which brings together Norwegian industries from aquaculture (Cermaq), agriculture (Woolero and Terramarine) and biorefinery (Greentech) to develop new circular bioprocess routes, comprising anaerobic digestion, hydrolysis and fungal fermentation, for efficient conversion of selectively processed biowastes into products for fish & animal feed and biostimulant fertilizers.