Open Access Research Article

Improving wastewater Quality of a Fish farm in Itacuruba, Northeastern Brazil

Érika Alves Tavares Marques1*, Gilberto Queiroz De Lima Filho2, Cláudia Ricardo De Oliveira1, Maristela Casé Costa Cunha3, Silvana Carvalho De Souza Calado4 and Maria Do Carmo Martins Sobral1

1Department of Civil Engineering, Brazil

2Department of Development and Environment, Brazil

3Department of Education, Brazil

4Department of Chemistry Engineering, Brazil

Corresponding Author

Received Date: April 24, 2019;  Published Date: May 10, 2019

Abstract

Itacuruba has ideal climate to install fish farms with a production capacity of about 100,000 tonnes per year. Located in the semiarid region where rainfall regime is extremely irregular, it is necessary to adopt strategies to improve the water use efficiency. The objective of this paper is to discuss about the efficiency of a constructed wetland (CW) on outlet water quality of a fish farm located in the Brazilian semiarid region. The system consists of an excavated tank using two aquatic macrophytes: Eichhornia crassipes and Egeria densa, which are endemic in the region. Water samples were taken from April 2015 to March 2016 for physical and chemical analysis of parameters during dry and rainy seasons. The results were compared with current legislation. During the rainy season, the maximum removal efficiency for total phosphorus was 78%, while for total nitrogen it was 35%. During the dry season, the maximum removal efficiency for phosphorus was 43% while for total nitrogen it was 53%. These results reveal that a constructed wetland is a viable alternative to improve the outlet quality of a fish farm, but it requires a complementary treatment system to achieve a satisfactory result.

Keywords: Constructed wetland; Removal efficiency; Phytoremediation; Water quality; Sub-middle

Abbreviations: RW, Wwin And Wwout-Sampling Points; RG-Ranges; AT-Air Temperature; WT-Water Temperature; Rain-Rainfall; EC-Electrical Conductivity; TDS-Total Dissolved Solids; TP-Total Phosphorus; SRP-Soluble Reactive Phosphorus; AN-Ammoniacal Nitrogen; TN-Total Nitrogen; DO-Dissolved Oxygen; NTU- Turbidity). MPV: Maximum Permissible Values; SD-Standard Deviation; Daily Air Temperatures On The Day Of The Monitoring (Between 08:00H And 10:00H).

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