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June 20, 2026

Microalgae Cultivation as a Method for Nutrient Removal and Valorisation of Liquid Digestate from Biogas

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Authors

MNMarianne NymarkCVCharlotte VolpeCBCansu Birgen

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Overview

Randomized trial investigates nutrient removal and biomass production using microalgae in fish sludge digestate, indicating environmental benefits.

Key Points

  • The study aims to evaluate the growth of Chlorella sorokiniana in fish sludge digestate for nutrient removal and biomass valorisation.
  • Conducted small-scale screening experiments with varying digestate concentrations and light intensities.
  • Cultivated microalgae in photobioreactors using 50% and 100% digestate at high light intensity.
  • Assessed growth, nutrient removal, and photosynthetic performance over a period of 5–10 days.
  • C. sorokiniana grew successfully in undiluted digestate with high ammonium concentrations.
  • Achieved reductions in ammonium (26–28%), chemical oxygen demand (43–53%), and total organic carbon (31–42%) within 5–10 days.
  • Biomass contained high total amino acid content (53–59% of dry weight).

Cite This Study

Nymark et al. (2026) studied this question.

synapsesocial.com/papers/6a363147db0793dc1a53843bhttps://doi.org/10.3303/cet26125002
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