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En un experimento a escala piloto desarrollado en Brasil, se cultivaron juveniles de tilapia genéticamente mejorada en efluente de tanque séptico seguido de laguna de alta tasa (LAT). Durante las 22 semanas de la investigación se evaluó la combinación de tres tasas de aplicación superficial de nitrógeno amoniacal total (NAT) (0,6; 1,2 y 2,4 kg NAT.ha-1.d-1) y tres densidades de cultivo (3; 6 y 12 peces.m-2). Los tanques de cultivo funcionaron como unidades de pulimento para tratamiento de las aguas residuales, adicionando (con los mejores resultados, alcanzados con la menor densidad de cultivo y 1,2 kg NAT.ha-1.d-1) las siguientes eficiencias de remoción adicionales a las obtenidas mediante el uso de la LAT: 78,3% para nitrógeno total Kjeldahl; 89,1% para nitrógeno amoniacal; 63,9% para fósforo total; 57,2% para demanda química de oxígeno; 2,36 unidades logarítmicas para E. coli. La productividad de los peces se estimó del orden de 2,67 ton.ha-1 para cultivo durante seis meses por año para climas templados, utilizando la población de plancton natural del agua residual doméstica tratada como la única fuente de alimento.

Iván A. Sánchez-Ortiz, Departamento de Recursos Hidrobiológicos, Universidad de Nariño, Pasto, Colombia

https://orcid.org/0000-0001-7579-5969 

Rafael Bastos, Departamento de Engenharia Civil, Universidade Federal de Viçosa, Viçosa-Minas Gerais Brazil

https://orcid.org/0000-0001-6781-9617

Eduardo A. Lanna, Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa-Minas Gerais, Brazil

https://orcid.org/0009-0002-0730-7999

Adriana B. Sales-Magalhães, Centro Universitário de Caratinga (UNEC). Caratinga-Minas Gerais, Brazil

https://orcid.org/0000-0003-3473-4996

1.
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Recibido 2023-01-18
Aceptado 2024-01-17
Publicado 2024-02-26