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Evaluation of the Efficiency of Duckweeds, Lemna sp. and Spirodela sp., in the Treatment of Tilapia Effluents

Author

Listed:
  • Itzel Galaviz-Villa
  • Cinthya Sosa-Villalobos
  • Alicia Garcia-Sanchez
  • Ma. Refugio Chavez
  • Fabiola Lango-Reynoso
  • Isabel Amaro-Espejo

Abstract

Farming aquatic plants can be used as an alternative in the treatment of effluents from aquaculture production units and in turn, in the production of biomass plant for feeding terrestrial and aquatic organisms. This research aims to evaluate the efficiency of duckweeds Spirodela sp. and Lemna sp. in the treatment of tilapia effluents (Oreochromis niloticus). The experiment was performed in triplicate and was conducted under natural environmental conditions within the facilities of the Laboratory of Applied Aquaculture Research (LAAR) of the Technological Institute of Boca del Río (ITBOCA). Each treatment contained 230 liters of effluent in each tube, with a water column of 40 cm and a seeding density of 400 g/m2 of vegetative biomass. The evaluation of the efficiency of Spirodela sp. and Lemna sp., in the removal of dissolved nutrients, was performed in 7 monitoring times; 12, 24, 36, 48, 72, 96 and 120 h. The results showed an efficiency in nutrient removal at 120 h of 75, 74 and 66% of N-NH3; 96, 92 and 75% N-NO2; 93, 88 and 75% N-NO3; 75, 72 and 64% N-NTK; 73, 60 and 58% of N-org., and 73, 63 and 68% of P. On the other hand, the removal of TSS and BOD5, during the first 24 h, was 83, 54, 58% and 65, 59, 33%, in the treatments. The efficiency in nutrient removal of both duckweeds, showed that both plants can be used in the treatment of effluents, being a sustainable and economical alternative for the aquaculture industry.

Suggested Citation

  • Itzel Galaviz-Villa & Cinthya Sosa-Villalobos & Alicia Garcia-Sanchez & Ma. Refugio Chavez & Fabiola Lango-Reynoso & Isabel Amaro-Espejo, 2016. "Evaluation of the Efficiency of Duckweeds, Lemna sp. and Spirodela sp., in the Treatment of Tilapia Effluents," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 8(12), pages 188-188, November.
    • Handle: RePEc:ibn:jasjnl:v:8:y:2016:i:12:p:188
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    References listed on IDEAS

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    1. Oron, Gideon, 1994. "Duckweed culture for wastewater renovation and biomass production," Agricultural Water Management, Elsevier, vol. 26(1-2), pages 27-40, September.
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    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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