Open AccessFILTRATION TECHNIQUE FOR RECIRCULATING AQUACULTURE SYSTEMS
Author(s) -
Poole Bruce M.
Publication year - 1983
Publication title -
journal of the world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0735-0147
DOI - 10.1111/j.1749-7345.1983.tb00100.x
Subject(s) - aquaculture , recirculating aquaculture system , trickling filter , biofilter , polyculture , biology , wastewater , filtration (mathematics) , reuse , fishery , suspended solids , sewage treatment , competition (biology) , water quality , total suspended solids , waste management , environmental science , environmental engineering , ecology , fish <actinopterygii> , engineering , chemical oxygen demand , statistics , mathematics
The use of biological filters in closed systems to maintain salmonids and crustaceans is becoming more common as commercial aquaculture ventures approach the urban marketplace. Competition for land and water resources makes the capital costs for equipment, tanks, and material economically feasible. The advantages of intensive closed system aquaculture are greater control over water quality, more production per unit area, and controllable growth rates. The feeding techniques and high loadings generally produce a concentrated wastewater that must be treated by physical, chemical, and biological processes before reuse. Treatment of ammonia, nitrite, and suspended solids are the primary concerns of the culturist. This paper describes the removal efficiencies of biological sand filters in commercial service for various loading parameters. Design factors and the ranges of operation for different systems and organisms are related to data collected over two years of culture. Particular attention is paid to the various soluble and solid forms of nitrogenous waste and their removal in prefiltration, submerged, and trickling biological oxidation systems. The recycled water is returned to many different tanks for polyculture production of fish and crustaceans.