Using fly larvae to convert food waste for growing Oujiang color common carps: Health risk assessment of polycyclic aromatic hydrocarbons

Meng GAO, Zhan-Biao YANG, Xiao-Xun XU, Jun-Ren XIAN, Yuan-Xiang YANG, Song YANG, Yu Bon MAN, Zhang CHENG

Research output: Contribution to journalArticlespeer-review

Abstract

The present study used Chrysomya megacephala larvae (CML) to transform food waste into safe and high-quality fish feed to substitute fish meal as a source of protein for growing Oujiang color common carps followed by a human health risk assessment of polycyclic aromatic hydrocarbons (PAHs). The results showed the ∑PAH concentration in the CML fed with food waste ranged from 50 to 370 μg kg⁻¹, and the most abundant PAH compound in the CML was BaP, contributing 59–84% of ∑PAHs. The Pearson correlation analysis results indicated no correlation between the ∑PAH concentrations and the culture substrate ratio (p > 0.05). Concentrations of BaP in the CML decreased with the increase of breeding density (p  < 0.01). The residues as organic fertilizers have no potential ecological risk for PAHs. The biotransformed larva meal was used to partially or completely replace the fish meal as supplementary protein in the experimental feeds (T₀, 0%; T₅₀, 50%; T₁₀₀, 100%). No significant difference (p  < 0.05) of survival rate, lipid, and protein content in Oujiang color common carp was noted among T₀, T₅₀, and T₁₀₀ fish feeds. Concentrations of ∑PAHs in Oujiang color common carp fed with the CML fish feeds all met the food safety standards in the European Union (EU). Furthermore, the consumption of Oujiang color common carps fed with the CML feed does not pose any health risks of PAHs for humans. Copyright © 2023 The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Original languageEnglish
JournalEnvironmental Science and Pollution Research
Early online date19 Jan 2023
DOIs
Publication statusE-pub ahead of print - 19 Jan 2023

Citation

Gao, M., Yang, Z.‑B., Xu, X.‑X., Xian, J.‑R., Yang, Y.‑X., Yang, S., . . . Cheng, Z. (2023). Using fly larvae to convert food waste for growing Oujiang color common carps: Health risk assessment of polycyclic aromatic hydrocarbons. Environmental Science and Pollution Research. Advance online publication. doi: 10.1007/s11356-023-25372-3

Keywords

  • Food waste
  • Chrysomya megacephala larvae
  • PAHs
  • Bioaccumulation
  • Health risk assessment

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