A1 Journal article (refereed)
Microalgae technology for polishing chemically-treated fish processing wastewater (2024)

Khalatbari, S., Sotaniemi, V.-H., Suokas, M., Taipale, S., & Leiviskä, T. (2024). Microalgae technology for polishing chemically-treated fish processing wastewater. Groundwater for Sustainable Development, 24, Article 101074. https://doi.org/10.1016/j.gsd.2023.101074

JYU authors or editors

Publication details

All authors or editors: Khalatbari, Saba; Sotaniemi, Ville-Hermanni; Suokas, Marko; Taipale, Sami; Leiviskä, Tiina

Journal or series: Groundwater for Sustainable Development

eISSN: 2352-801X

Publication year: 2024

Publication date: 26/12/2023

Volume: 24

Article number: 101074

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.gsd.2023.101074

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published: https://oulurepo.oulu.fi/handle/10024/47356

Abstract

The development of cost-effective treatment methods for nutrient-rich effluents is of great importance. In this study, microalgal-based technology was investigated as a final polishing stage for fish processing wastewater (FPWW) after fat and oil removal, with the purpose of facilitating wastewater reuse and nutrient recovery. First, the effect of FPWW filtration on the growth of two microalgal species (Chlorella sorokiniana and Selenastrum sp.) was investigated under batch mode. For both microalgae, the final biomass concentration and nutrient removal levels were higher in unfiltered FPWW than in filtered FPWW. Chlorella sorokiniana growth was notably greater than that of Selenastrum sp. Chlorella sorokiniana was further cultivated in a semi-continuous mode, which lead to stable microalgae growth and high nutrient uptake in unfiltered wastewater with no need to eliminate indigenous microorganisms and contamination. However, based on biochemical analysis, filtration increased the availability of essential fatty acids and carotenoids from Chlorella sorokiniana, thus increasing the commercial value of the algal biomass.

Keywords: sewage; waste water treatment; nutrients (plants); nutrient cycle; nitrogen; phosphorus; microalgae; bacteria

Free keywords: Chlorella sorokiniana; Selenastrum sp.; nutrient removal; nitrogen; microalgal-bacterial interaction; 16S rRNA gene sequencing

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2024

Preliminary JUFO rating: 1