Data/hora: 03/07/2024 11:38:11

Biblioteca(s): 	Epagri-Sede.	
Tipo da produção científica: 	Resumo em Anais de Congresso	
Data corrente: 	09/12/2015	
Data da última atualização: 	09/12/2015	
Autoria: 	LAPA, K. R.; WOJCIKIEWICZ, C. A.; SILVA, E.; BONETTI, C. V. D. H. C.; VIEIRA, F. N.; SEIFFERT, W. Q.; GARBOSSA, L. H. P.	
Título: 	WATER QUALITY LOAD DURING THE DRAIN HARVESTING OF TWO SHRIMP PONDS OF Litopenaeus vannamei.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	In: FEIRA NACIONAL DO CAMARÃO & LACQUA/SARA (WAS)?15, 12., 2015, Fortaleza. Resumos... Fortaleza: WAS, 2015. p. 269	
Idioma: 	Inglês	
Conteúdo: 	To advance with the shrimp farming activities in Brazil it is essential to guarantee the compliance with the water quality national standards for water discharge and receiving water bodies. Besides, working on maintaining the water quality should be a concern for aquaculture farmers because of its evident dependency on it. The project was carried out in a Shrimp farm with 18 ponds, located in the Northeast region of the Santa Catarina State. The water flow of the shrimp farm was accompanied on two shrimp ponds, number 2 and 5 (P2 and P5) during the drain harvest. The studied ponds were operated with, approximatively, 9,290 m3 and 9,329 m3 of water. The drain harvest was executed with an average discharge flow of 210 L.s-1. Water samples were collected in the water gate to analyze water quality parameters. The parameters pH, dissolved oxygen, temperature, conductivity and turbidity were sampled with a multiprobe sonde. Water samples were analyzed for settleable solids and stored to suspended solids series. At the same time of water sampling, water levels were monitored until the ponds were empty. Preliminary results indicate that the water parameters related to the presence of solid particles are influenced by water speed and the turbulence on the bottom of the ponds. Most part of the total water volume 7,633 m3 and 7,641 m3 for P2 and P5, respectively presented adequate characteristics for settleable solids and turbidity. It corresponds to more than 80% of the total used water. The resulting water, about 1,700 m3 may need some kind of treatment. Some of the monitored parameters started to vary before the ones direct related to solid contents, like temperature due to night operation and DO, probably related to the interruption of the mechanical aeration. Both Ponds presented similar behavior in terms of water quality variation. The figure 1 presents the results obtained in P2. The next step is to calculate the exact variation of water volume and the corresponding water quality loads to the receiving water bodies in terms of total solids and total suspended solids as other parameters. These results may help to subsidize decisions about economically scale treatment utilities for shrimp farms.	
Palavras-Chave: 	pond; quality; shrimp; Water.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_37149.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
Exemplares: 	Epagri-Sede - (99696-1) - UPC - PL - DD -  -  -  - DIS