RISK ASSESSMENT OF SURFACE WATERS ASSOCIATED WITH WATER CIRCULATION TECHNOLOGIES ON TROUT FARMS
 
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1
Department of Land Reclamation and Environmental Management, Faculty of Environmental Managementand Agriculture, University of Warmia and Mazury in Olsztyn, Plac Łódzki 2, 10-756 Olsztyn, Poland
2
Department of Security Rudiments, Faculty of Technical Sciences, University of Warmia and Mazury in Olsztyn, Heweliusza 10, 10-719 Olsztyn, Poland
3
Department of Fish Biology and Breeding. Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Oczapowskiego 14, 10-719 Olsztyn, Poland
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Department of Pathophysiology, Forensic Veterinary Medicine and Administration, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13, 10-719 Olsztyn, Poland
Publish date: 2014-07-01
 
J. Ecol. Eng. 2014; 15(3):76–81
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ABSTRACT
Dynamic development of aquaculture has led to an increasing impact on the status of surface waters. Fish production generates wastes that, at high concentrations, may present a serious risk to the aquatic environment. Studies on the assessment of the impact of water management technologies in trout production on the quality of surface waters were conducted in 2011. Six farms were selected for the studies and were divided into two groups based on water management solutions (n = 3): farms with a flow through system (FTS) and farms with a recirculation aquaculture system (RAS). On all farms, water measurement points were set and they depicted the quality of inflow water, the quality of water in ponds and the quality of outflow water. The studies did not demonstrate any impact of applied technology on electrolyte conductivity or calcium and magnesium concentrations in outflow water from a trout operation. In addition, it was found that the use of water for production purposes resulted in a slight increase in phosphorus and total nitrogen concentrations in waste waters.