FN Archimer Export Format PT J TI Comparison of two methods for evaluating waste of a flow through trout farm BT AF ROQUE D'ORBCASTEL, Emmanuelle BLANCHETON, Jean-Paul BOUJARD, Thierry AUBIN, Joel MOUTOUNET, Yves PRZYBYLA, Cyrille BELAUD, Alain AS 1:1;2:1;3:2;4:3;5:4;6:1;7:5; FF 1:PDG-DOP-LER-LERPAC;2:PDG-DOP-DCM-BOME-LALR;3:;4:;5:;6:PDG-DOP-DCM-BOME-LALR;7:; C1 IFREMER, Stn Aquaculture Expt, Lab Rech Piscicole Mediterranee Chem Maguelone, F-34250 Palavas Les Flots, France. INRA, Unite Mixte INRA IFREMER, Equipe Nutr Aquaculture & Environm, Stn INRA, F-64310 St Pee Sur Nivelle, France. INRA, UMR SAS, Equipe Fields, F-35042 Rennes, France. BIOMAR SA, ZI Nersac, F-16440 Nersac, France. ENSAT, Ecole Natl Super Agron Toulouse, F-31326 Castanet Tolosan, France. C2 IFREMER, FRANCE INRA, FRANCE INRA, FRANCE BIOMAR SA, FRANCE ENSAT, FRANCE SI CORSE PALAVAS ST PEE SUR NIVELLE SE PDG-DOP-LER-LERPAC PDG-DOP-DCM-BOME-LALR PDG-DOP-DCB-PFOM-ARN IN WOS Ifremer jusqu'en 2018 copubli-france copubli-p187 IF 1.678 TC 34 UR https://archimer.ifremer.fr/doc/2008/publication-6822.pdf LA English DT Article DE ;Phosphorus;Nitrogen;Suspended solids;Trout farm;Waste AB European water legislation enforces increasingly restrictive measures with regards to reduction of water consumption and waste emission in order to minimise the potential environmental impact of the agro industry sector. Fish farms are particularly concerned, but legislation covering effluent discharge varies significantly from country to country. However, recommendations and directives from institutional, national or regional bodies suggest the enforcement of increasingly strict waste reduction measures and the development of waste treatment. Before treatment, it is necessary to evaluate waste production in terms of composition and quantity. The waste quantification methods used today for fish culture systems are either based on direct measurements of nutrient and suspended solid fluxes or on indirect evaluation based on the digestibility coefficients of the feed constituents. The objective of the present study is to evaluate the waste of a freshwater flow through farm using both approaches and to discuss their applicability, drawbacks and advantages from the viewpoints of fish farmers and control authorities. Waste production on the farm was monitored during several 24 hour cycles in order to characterise the effluents of the system. The predictions and measurements for the total nitrogen (TN) parameter were well correlated, but measured and predicted suspended solids (SS) and total phosphorus (TP) values presented a weaker correlation coefficient. The hydrobiological method gives details on the N and P forms of waste but this method is heavy and it is difficult to obtain representative samples and flow rate measurements. The nutritional method is the simplest to use, provided that feed data are available. (C) 2007 Elsevier B.V. All rights reserved.. PY 2008 SO Aquaculture SN 0044-8486 PU Elsevier VL 274 IS 1 UT 000252920700010 BP 72 EP 79 DI 10.1016/j.aquaculture.2007.10.053 ID 6822 ER EF