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Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads

Incorporation of microalgae in recirculating aquaculture systems (RAS) would absorb the inorganic nitrogen and phosphorus, thus potentially contributing to water purification.Immobilization or entrapment of microalgal cells in spherical gels is a potential method to incor- porate microalgae in the...

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Main Authors: Mohamed Ramli, Norulhuda, Verdegem, M. C. J., Md Yusoff, Fatimah, Zulkifely, M. K., Verreth, J. A. J.
Format: Article
Language:English
Published: Inter Research 2017
Online Access:http://psasir.upm.edu.my/id/eprint/62953/1/Removal%20of%20ammonium%20and%20nitrate%20in%20recirculating.pdf
http://psasir.upm.edu.my/id/eprint/62953/
https://www.int-res.com/articles/aei2017/9/q009p213.pdf
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spelling my.upm.eprints.629532018-10-22T08:49:07Z http://psasir.upm.edu.my/id/eprint/62953/ Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads Mohamed Ramli, Norulhuda Verdegem, M. C. J. Md Yusoff, Fatimah Zulkifely, M. K. Verreth, J. A. J. Incorporation of microalgae in recirculating aquaculture systems (RAS) would absorb the inorganic nitrogen and phosphorus, thus potentially contributing to water purification.Immobilization or entrapment of microalgal cells in spherical gels is a potential method to incor- porate microalgae in the RAS. Filamentous microalgae are presumed to suit the immobilization technique because the gels can serve as substrates for the microalgae to attach. In the first experiment of this study, growth and nitrogen uptake of Stigeoclonium nanum, a filamentous micro-alga, was compared when cultured using an immobilization technique or in a normal suspension.In the second experiment, immobilized S. nanum was cultured in 4 media with different total ammonia nitrogen (TAN) and nitrate-nitrogen (NO3-N) concentrations. The results showed a significantly higher algal growth and TAN removal by S.nanum immobilized in alginate than for S.nanum in free suspension culture. When both TAN and NO3-N were added to the culture medium, the uptake of TAN by immobilized S.nanum was significantly more efficient than NO3-N uptake.Our results indicated that S.nanum was able to grow immobilized in a medium, exhibiting a higher growth and TAN uptake than when the algae were in free suspension. S.nanum preferred ammonium over nitrate, which is suitable for RAS that require removal of the total ammonia which is produced by fish and by organic decomposition in the system. Inter Research 2017-07-06 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/62953/1/Removal%20of%20ammonium%20and%20nitrate%20in%20recirculating.pdf Mohamed Ramli, Norulhuda and Verdegem, M. C. J. and Md Yusoff, Fatimah and Zulkifely, M. K. and Verreth, J. A. J. (2017) Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads. Aquaculture Environment Interactions, 9. 213 - 222. ISSN 1869-215X; ESSN: 1869-7534 https://www.int-res.com/articles/aei2017/9/q009p213.pdf 10.3354/aei00225
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Incorporation of microalgae in recirculating aquaculture systems (RAS) would absorb the inorganic nitrogen and phosphorus, thus potentially contributing to water purification.Immobilization or entrapment of microalgal cells in spherical gels is a potential method to incor- porate microalgae in the RAS. Filamentous microalgae are presumed to suit the immobilization technique because the gels can serve as substrates for the microalgae to attach. In the first experiment of this study, growth and nitrogen uptake of Stigeoclonium nanum, a filamentous micro-alga, was compared when cultured using an immobilization technique or in a normal suspension.In the second experiment, immobilized S. nanum was cultured in 4 media with different total ammonia nitrogen (TAN) and nitrate-nitrogen (NO3-N) concentrations. The results showed a significantly higher algal growth and TAN removal by S.nanum immobilized in alginate than for S.nanum in free suspension culture. When both TAN and NO3-N were added to the culture medium, the uptake of TAN by immobilized S.nanum was significantly more efficient than NO3-N uptake.Our results indicated that S.nanum was able to grow immobilized in a medium, exhibiting a higher growth and TAN uptake than when the algae were in free suspension. S.nanum preferred ammonium over nitrate, which is suitable for RAS that require removal of the total ammonia which is produced by fish and by organic decomposition in the system.
format Article
author Mohamed Ramli, Norulhuda
Verdegem, M. C. J.
Md Yusoff, Fatimah
Zulkifely, M. K.
Verreth, J. A. J.
spellingShingle Mohamed Ramli, Norulhuda
Verdegem, M. C. J.
Md Yusoff, Fatimah
Zulkifely, M. K.
Verreth, J. A. J.
Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads
author_facet Mohamed Ramli, Norulhuda
Verdegem, M. C. J.
Md Yusoff, Fatimah
Zulkifely, M. K.
Verreth, J. A. J.
author_sort Mohamed Ramli, Norulhuda
title Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads
title_short Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads
title_full Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads
title_fullStr Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads
title_full_unstemmed Removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte Stigeoclonium nanum immobilized in alginate beads
title_sort removal of ammonium and nitrate in recirculating aquaculture systems by the epiphyte stigeoclonium nanum immobilized in alginate beads
publisher Inter Research
publishDate 2017
url http://psasir.upm.edu.my/id/eprint/62953/1/Removal%20of%20ammonium%20and%20nitrate%20in%20recirculating.pdf
http://psasir.upm.edu.my/id/eprint/62953/
https://www.int-res.com/articles/aei2017/9/q009p213.pdf
_version_ 1643837717139685376
score 13.211869

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