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Use of Zeolite (Chabazite) Supplemented with Effective Microorganisms for Wastewater Mitigation of a Marine Fish Farm

Author

Listed:
  • Mauro Lenzi

    (Lagoon Ecology and Aquaculture Laboratory (LEALab), Via G. Leopardi 9, 58015 Orbetello, Italy)

  • Marco Leporatti Persiano

    (Lagoon Ecology and Aquaculture Laboratory (LEALab), Via G. Leopardi 9, 58015 Orbetello, Italy)

  • Maurizio Ciarapica

    (Lagoon Ecology and Aquaculture Laboratory (LEALab), Via G. Leopardi 9, 58015 Orbetello, Italy)

  • Antonella D’Agostino

    (Department of Economics and Statistics, University of Siena, 53100 Siena, Italy)

Abstract

A study was conducted to assess the efficacy of chabazite zeolite in mitigating ammonia levels in wastewater from a land-based marine fish farm in southern Tuscany (Italy). The fish farm discharges effluent into a lagoon, constituting an important eutrophication source. The experimental setup involved a pond/canal that received wastewater from three sea bream tanks (40 L/s). A 50 m canal section was divided into two parallel halves (T and B), each about 3 m wide. In T, a chabazite bed (granules about 3 cm ϕ) was placed that was about 6 cm thick; B was untreated and used as a control. Five sampling trials were conducted in both T and B to determine N-NH 4 , N-NO 3 , and P-PO 4 levels, in surface and near-bottom waters at both input and output. Prior to the zeolite addition, T and B sediments were sampled for TN and TP determination. Results indicated the not-managed canal system released nutrients and the output values were higher than the input, overshadowing the zeolite effects. Significant zeolite effects were observed by comparing B and T for differences between input and output: in T, nitrate increased ( p = 0.05), demonstrating a resumption of nitrification, and ammonium ( p = 0.07) and SRP ( p = 0.06) decreased, in contrast to B.

Suggested Citation

  • Mauro Lenzi & Marco Leporatti Persiano & Maurizio Ciarapica & Antonella D’Agostino, 2024. "Use of Zeolite (Chabazite) Supplemented with Effective Microorganisms for Wastewater Mitigation of a Marine Fish Farm," Sustainability, MDPI, vol. 16(4), pages 1-12, February.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:4:p:1353-:d:1334002
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