Growth and nitrogen uptake by Arthrospira platensis cultured in aquaculture wastewater from Nile tilapia reared in biofloc system

Laenne Barbara Silva de  Moraes; Géssica Cavalcanti Pereira  Mota; Renata  da Silva  Farias; Yllana Ferreira  Marinho; Luis Otávio Brito  Silva; Alfredo Olivera  Gálvez

doi:10.4025/actascibiolsci.v43i1.57549

Growth and nitrogen uptake by Arthrospira platensis cultured in aquaculture wastewater from Nile tilapia reared in biofloc system

Laenne Barbara Silva de Moraes Universidade Federal Rural de Pernambuco https://orcid.org/0000-0001-6987-7685
Géssica Cavalcanti Pereira Mota Universidade Federal Rural de Pernambuco https://orcid.org/0000-0002-6007-8091
Renata da Silva Farias Universidade Federal Rural de Pernambuco https://orcid.org/0000-0003-4082-3186
Yllana Ferreira Marinho Universidade Federal do Maranhão https://orcid.org/0000-0002-1790-1337
Luis Otávio Brito Silva Universidade Federal Rural de Pernambuco https://orcid.org/0000-0002-6971-3020
Alfredo Olivera Gálvez Universidade Federal Rural de Pernambuco https://orcid.org/0000-0001-5149-2605

DOI: https://doi.org/10.4025/actascibiolsci.v43i1.57549

Keywords: bioremediation; BFT; nitrogen compounds; growth rate; mixotrophic; spirulina.

Abstract

This study aimed to evaluate the growth of Arthrospira (Spirulina) platensis cultivated in Zarrouk culture medium and effluent from Nile tilapia (Oreochromis niloticus) reared in biofloc system. Four treatments were used: Control (100% Zarrouk), E50 (50% Zarrouk + 50% Tilapia effluent), E75 (25% Zarrouk + 75% Tilapia effluent), and E100 (100% Tilapia effluent), and the experiment lasted 10 days. Growth parameters such as maximum cell density (MCD), doubling time (DT), and growth rate (K) were daily evaluated, as well as pH and water temperature. In addition, the concentrations of total ammonia nitrogen (TAN), nitrite-N (NO₂-N), and nitrate-N (NO₃-N) were analyzed in order to compare nitrogen absorption. Among treatments, E50 and E75 obtained higher maximum cell densities and presented an exponential growth rate similar to the control treatment. Regarding the concentrations of nitrogen compounds, a significant reduction was observed in all treatments, with an NO₃-N uptake of 99%, followed by 80% of TAN and 90% of NO₂-N. Thus, giving the results obtained, besides being able to grow in wastewater, A. platensis can also be used in bioremediation processes, confirming the potential of this species.

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Published

2021-11-30

How to Cite

Moraes, L. B. S. de, Mota, G. C. P., Farias, R. da S., Marinho, Y. F., Silva, L. O. B., & Gálvez, A. O. (2021). Growth and nitrogen uptake by Arthrospira platensis cultured in aquaculture wastewater from Nile tilapia reared in biofloc system . Acta Scientiarum. Biological Sciences, 43(1), e57549. https://doi.org/10.4025/actascibiolsci.v43i1.57549

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Issue

Vol 43 (2021): Publicação contínua

Section

Biotechnology

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0.6

2019CiteScore

31st percentile

0.6

2019CiteScore

31st percentile