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Microbial communities in full-scale woodchip bioreactors treating aquaculture effluents - Tutkimusportaali - Converis - Jyväskylän yliopisto
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Microbial communities in full-scale woodchip bioreactors treating aquaculture effluents (2022)
Aalto, S. L., Suurnäkki, S., von Ahnen, M., Tiirola, M., & Bovbjerg Pedersen, P. (2022). Microbial communities in full-scale woodchip bioreactors treating aquaculture effluents. Journal of Environmental Management, 301, Article 113852. https://doi.org/10.1016/j.jenvman.2021.113852
Julkaisun kaikki tekijät tai toimittajat: Aalto, Sanni L.; Suurnäkki, Suvi; von Ahnen, Mathis; Tiirola, Marja; Bovbjerg Pedersen, Per
Lehti tai sarja: Journal of Environmental Management
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/78357
Woodchip bioreactors are being successfully applied to remove nitrate from commercial land-based recirculating aquaculture system (RAS) effluents. In order to understand and optimize the overall function of these bioreactors, knowledge on the microbial communities, especially on the microbes with potential for production or mitigation of harmful substances (e.g. hydrogen sulfide; H2S) is needed. In this study, we quantified and characterized bacterial and fungal communities, including potential H2S producers and consumers, using qPCR and high throughput sequencing of 16S rRNA gene. We took water samples from bioreactors and their inlet and outlet, and sampled biofilms growing on woodchips and on the outlet of the three full-scale woodchip bioreactors treating effluents of three individual RAS. We found that bioreactors hosted a high biomass of both bacteria and fungi. Although the composition of microbial communities of the inlet varied between the bioreactors, the conditions in the bioreactors selected for the same core microbial taxa. The H2S producing sulfate reducing bacteria (SRB) were mainly found in the nitrate-limited outlets of the bioreactors, the main groups being deltaproteobacterial Desulfobulbus and Desulfovibrio. The abundance of H2S consuming sulfate oxidizing bacteria (SOB) was 5–10 times higher than that of SRB, and SOB communities were dominated by Arcobacter and other genera from phylum Epsilonbacteraeota, which are also capable of autotrophic denitrification. Indeed, the relative abundance of potential autotrophic denitrifiers of all denitrifier sequences was even 54% in outlet water samples and 56% in the outlet biofilm samples. Altogether, our results show that the highly abundant bacterial and fungal communities in woodchip bioreactors are shaped through the conditions prevailing within the bioreactor, indicating that the bioreactors with similar design and operational settings should provide similar function even when conditions in the preceding RAS would differ. Furthermore, autotrophic denitrifiers can have a significant role in woodchip biofilters, consuming potentially produced H2S and removing nitrate, lengthening the operational age and thus further improving the overall environmental benefit of these bioreactors.
YSO-asiasanat: vesiviljely (kalatalous); jäteveden käsittely; denitrifikaatio; bioreaktorit; hake; mikrobisto; sienet; sulfidit
Vapaat asiasanat: aquaculture; denitrification; fungi; microbiome; sulfate reduction
1183 Kasvibiologia, mikrobiologia, virologia (118 Biotieteet)
219 Ympäristön bioteknologia (Tekniikka)
Bio- ja ympäristötieteiden laitos
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Kiertovesiviljelyn poistoveden ravinteiden ja orgaanisen aineen innovatiivinen poisto
Micro-RIP Functional analysis of uncultivated microbes using radioisotope probing
Nanoscience Center (Fysiikan laitos PHYS, JYFL) (Matemaattis-luonnontieteellinen tiedekunta) (Kemian laitos CHEM) (Bio- ja ympäristötieteiden laitos BIOENV) NSC
Viimeisin päivitys 2022-20-09 klo 15:18
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