A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Increased sulfate availability in saline water promotes hydrogen sulfide production in fish organic waste (2020)


Letelier-Gordo, C. O., Aalto, S. L., Suurnäkki, S., & Pedersen, P. B. (2020). Increased sulfate availability in saline water promotes hydrogen sulfide production in fish organic waste. Aquacultural Engineering, 89, 102062. https://doi.org/10.1016/j.aquaeng.2020.102062


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Letelier-Gordo, Carlos O.; Aalto, Sanni L.; Suurnäkki, Suvi; Pedersen, Per Bovbjerg

Lehti tai sarja: Aquacultural Engineering

ISSN: 0144-8609

eISSN: 1873-5614

Julkaisuvuosi: 2020

Volyymi: 89

Artikkelin sivunumerot: 102062

Kustantaja: Elsevier

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.aquaeng.2020.102062

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/67955


Tiivistelmä

The risk of hydrogen sulfide (H2S) production can be a challenge in marine land-based recirculating aquaculture systems (RAS). Hydrogen sulfide is a toxic gas that can cause massive fish mortality even at low concentrations, and in addition, serious odour problems in the surroundings. It is a bacterial by-product originating from the degradation of organic matter in sulfur-rich waters such as marine waters. In order to hinder H2S production in marine land-based RAS, more information on the H2S production conditions and the associated microbiology is needed. In this study, the production of H2S from rainbow trout (Oncorhynchus mykiss) organic waste was examined using a novel H2S measurement method under a range of salinities (0, 5, 10, 15, 25 and 35 g/L) in anaerobic mixed reactors, and the microbial communities as well as abundance of sulfate reducing bacteria (SRB) were characterized. The maximum H2S concentration increased from 23.1 ± 8.2 mg H2S/L at 0 g/L salinity to 153.9 ± 34.1 mg H2S/L at 35 g/L salinity. Similarly, the H2S production rate increased from 5.6 ± 0.2 at 0 g/L salinity to 26.4 ± 12.7 mg of H2S produced per day at 35 g/L salinity. The highest H2S production was recorded after increased availability of volatile fatty acids, which were produced by fermentative bacteria from phyla Firmicutes and Bacteroidetes that dominated the microbial communities after day 5. The traditional sulfate reducing bacteria (SRB) were found only at 0 and 5 g/L salinity, while at higher salinities, H2S production was carried out by novel unquantifiable SRB. The results demonstrate that H2S can be a pronounced problem in marine RAS, although it can be controlled through preventing anaerobic conditions within the system.


YSO-asiasanat: rikkivety; orgaaninen aines; merivesi; sulfaatit

Vapaat asiasanat: hydrogen sulfide; organic matter; seawater; sulfate; sulfate reducing bacteria


Liittyvät organisaatiot


OKM-raportointi: Kyllä

Raportointivuosi: 2020

JUFO-taso: 1


Viimeisin päivitys 2022-20-09 klo 15:19