Influence of feed ingredients on water quality parameters in RAS

Publication: ResearchConference abstract in proceedings – Annual report year: 2011

Standard

Influence of feed ingredients on water quality parameters in RAS. / Pedersen, Per Bovbjerg; Pedersen, Lars-Flemming; Suhr, Karin Isabel; Dalsgaard, Anne Johanne Tang; Arvin, Erik.

Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011. ed. / Anne Johanne Tang Dalsgaard. Vol. No. 31 Charlottenlund : DTU Aqua. Institut for Akvatiske Ressourcer, 2011. (DTU Aqua Report; No. 237-2011).

Publication: ResearchConference abstract in proceedings – Annual report year: 2011

Harvard

Pedersen, PB, Pedersen, L-F, Suhr, KI, Dalsgaard, AJT & Arvin, E 2011, 'Influence of feed ingredients on water quality parameters in RAS'. in AJT Dalsgaard (ed.), Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011. vol. No. 31, DTU Aqua. Institut for Akvatiske Ressourcer, Charlottenlund. DTU Aqua Report, no. 237-2011

APA

Pedersen, P. B., Pedersen, L-F., Suhr, K. I., Dalsgaard, A. J. T., & Arvin, E. (2011). Influence of feed ingredients on water quality parameters in RAS. In A. J. T. Dalsgaard (Ed.), Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011. (Vol. No. 31). Charlottenlund: DTU Aqua. Institut for Akvatiske Ressourcer. (DTU Aqua Report; No. 237-2011).

CBE

Pedersen PB, Pedersen L-F, Suhr KI, Dalsgaard AJT, Arvin E. 2011. Influence of feed ingredients on water quality parameters in RAS. Dalsgaard AJT, editor. In Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011. Charlottenlund: DTU Aqua. Institut for Akvatiske Ressourcer. (DTU Aqua Report; No. 237-2011).

MLA

Pedersen, Per Bovbjerg et al. "Influence of feed ingredients on water quality parameters in RAS". Dalsgaard, Anne Johanne Tang (editors). Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011. Charlottenlund: DTU Aqua. Institut for Akvatiske Ressourcer. 2011. (DTU Aqua Report; Journal number 237-2011).

Vancouver

Pedersen PB, Pedersen L-F, Suhr KI, Dalsgaard AJT, Arvin E. Influence of feed ingredients on water quality parameters in RAS. In Dalsgaard AJT, editor, Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011. Vol. No. 31. Charlottenlund: DTU Aqua. Institut for Akvatiske Ressourcer. 2011. (DTU Aqua Report; No. 237-2011).

Author

Pedersen, Per Bovbjerg; Pedersen, Lars-Flemming; Suhr, Karin Isabel; Dalsgaard, Anne Johanne Tang; Arvin, Erik / Influence of feed ingredients on water quality parameters in RAS.

Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011. ed. / Anne Johanne Tang Dalsgaard. Vol. No. 31 Charlottenlund : DTU Aqua. Institut for Akvatiske Ressourcer, 2011. (DTU Aqua Report; No. 237-2011).

Publication: ResearchConference abstract in proceedings – Annual report year: 2011

Bibtex

@inbook{c1ca00a1c7a4400bafe085f1fa9ad8aa,
title = "Influence of feed ingredients on water quality parameters in RAS",
publisher = "DTU Aqua. Institut for Akvatiske Ressourcer",
author = "Pedersen, {Per Bovbjerg} and Lars-Flemming Pedersen and Suhr, {Karin Isabel} and Dalsgaard, {Anne Johanne Tang} and Erik Arvin",
year = "2011",
editor = "Dalsgaard, {Anne Johanne Tang}",
volume = "No. 31",
isbn = "978-87-7481-136-7",
series = "DTU Aqua Report",
booktitle = "Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011",

}

RIS

TY - ABST

T1 - Influence of feed ingredients on water quality parameters in RAS

A1 - Pedersen,Per Bovbjerg

A1 - Pedersen,Lars-Flemming

A1 - Suhr,Karin Isabel

A1 - Dalsgaard,Anne Johanne Tang

A1 - Arvin,Erik

AU - Pedersen,Per Bovbjerg

AU - Pedersen,Lars-Flemming

AU - Suhr,Karin Isabel

AU - Dalsgaard,Anne Johanne Tang

AU - Arvin,Erik

PB - DTU Aqua. Institut for Akvatiske Ressourcer

CY - Charlottenlund

PY - 2011

Y1 - 2011

N2 - Although feed by far is providing the major input to RAS, relatively little is published about the correlation between feed composition and the resulting water quality in such systems. In a set-up with 6 identical RAS, each consisting of a fish tank (0.5 m3), a swirl separator, a submerged biofilter (0.67 m3/100 m2) and a trickling filter (0.17 m3/33 m2), two different feed types were tested in a triplicate set-up. The two feed types used were identical recipes (44% protein, 30% fat) except for the inclusion of 0.2 % guar gum (Grindsted Guar, Danisco) in one of the types. The inclusion level of plant-based protein in the diets was relatively high (68% of protein). Growth performance (SGR, FCR) was not different between the feed types. Fish in each system - and thereby the system itself - were fed 500 g feed/day. After 8 weeks on the same commercial feed type, test feed was administered to the systems for 49 consecutive days. Each week, 24h-water samples (1 sample/hour) were collected from each system. The sludge collected in the swirl separator that day was also collected. Water and sludge were subsequently analysed for nitrogen, phosphorous and organic matter content. Inclusion of guar gum had impact on water quality in the systems as well as on matter removed by the swirl separators. In the RAS water, phosphorous (Ptot and Pdiss) concentrations were reduced by guar gum. Organic matter content (CODdiss) in the water was also reduced. Corresponding to this, more dry matter, more COD and more phosphorous were removed by the swirl separators. As might be expected from the high protein digestibility (determined in a separate study), no effects were generally observed on nitrogen compounds

AB - Although feed by far is providing the major input to RAS, relatively little is published about the correlation between feed composition and the resulting water quality in such systems. In a set-up with 6 identical RAS, each consisting of a fish tank (0.5 m3), a swirl separator, a submerged biofilter (0.67 m3/100 m2) and a trickling filter (0.17 m3/33 m2), two different feed types were tested in a triplicate set-up. The two feed types used were identical recipes (44% protein, 30% fat) except for the inclusion of 0.2 % guar gum (Grindsted Guar, Danisco) in one of the types. The inclusion level of plant-based protein in the diets was relatively high (68% of protein). Growth performance (SGR, FCR) was not different between the feed types. Fish in each system - and thereby the system itself - were fed 500 g feed/day. After 8 weeks on the same commercial feed type, test feed was administered to the systems for 49 consecutive days. Each week, 24h-water samples (1 sample/hour) were collected from each system. The sludge collected in the swirl separator that day was also collected. Water and sludge were subsequently analysed for nitrogen, phosphorous and organic matter content. Inclusion of guar gum had impact on water quality in the systems as well as on matter removed by the swirl separators. In the RAS water, phosphorous (Ptot and Pdiss) concentrations were reduced by guar gum. Organic matter content (CODdiss) in the water was also reduced. Corresponding to this, more dry matter, more COD and more phosphorous were removed by the swirl separators. As might be expected from the high protein digestibility (determined in a separate study), no effects were generally observed on nitrogen compounds

SN - 978-87-7481-136-7

VL - No. 31

BT - Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011

T2 - Workshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011

A2 - Dalsgaard,Anne Johanne Tang

ED - Dalsgaard,Anne Johanne Tang

T3 - DTU Aqua Report

T3 - en_GB

ER -