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Plants and Environment

E-ISSN: 2582-3744
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2019, Vol. 1, Issue 1

Treatment of frog farming effluent with Eichhornia crassipes (Mart.) Solms


Author(s): Lúcia Helena Sipaúba-Tavares*, Lorena Regina da Silva Peres and Bruno Scardoeli-Truzzi

Affiliation: *Laboratory of Limnology and Plankton Production, São Paulo State University, Aquaculture Center, Jaboticabal, SP, 14884-900, Brazil

Abstract: Water, sediment, phytoplankton and Protozoa fauna from a constructed wetland used for the treatment of bullfrog farming effluent in southeastern Brazil, were sampled. The first sample was retrieved from the adult frog breeding area, fed on 16 kg day-1 feed and the second was retrieved from the tadpoles breeding, fed on 4 kg day-1 feed. Each period corresponded to 35 days (5 weeks each) of weekly sampling. The hydrological regime and decomposition processes had strong impact on the water quality in the wetland and on the composition of phytoplankton and Protozoa communities. Removal rate was lower than 42%, except thermo-tolerant coliforms, over 90%, due to flow in the wetland and the highest load in the inlet water. Plants and sediment had a strong effect on reducing nutrients in the wetland. Protozoa comprised three taxa, whilst phytoplankton comprised 36 taxa, with Bacillariophyceae featuring the highest relative abundance. Current study revealed relative removal of residue from the frog farm using the wetland in waste water treatment with floating plant (Eichhornia crassipes). The treatment system may be a tool in amphifarms due to management of frog framing.

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