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Ammonium and urea removal by Spirulina platensis.

Identifieur interne : 000476 ( PubMed/Checkpoint ); précédent : 000475; suivant : 000477

Ammonium and urea removal by Spirulina platensis.

Auteurs : A. Converti [Italie] ; S. Scapazzoni ; A. Lodi ; J C M. Carvalho

Source :

Journal of industrial microbiology & biotechnology [ 1367-5435 ] ; 2006.

RBID : pubmed:16175408

English descriptors

KwdEn :
- Ammonia (metabolism), Bacterial Proteins (metabolism), Cyanobacteria (drug effects), Cyanobacteria (growth & development), Cyanobacteria (metabolism), Industrial Microbiology, Kinetics, Nitrates (metabolism), Nitrogen (metabolism), Spirulina, Urea (metabolism).
MESH :
- chemical , metabolism : Ammonia, Bacterial Proteins, Nitrates, Nitrogen, Urea.
- drug effects : Cyanobacteria.
- growth & development : Cyanobacteria.
- metabolism : Cyanobacteria.
- Industrial Microbiology, Kinetics, Spirulina.

Abstract

Different concentrations either of ammonium chloride or urea were used in batch and fed-batch cultivations of Spirulina platensis to evaluate the possibility of substituting nitrate by cheaper reduced nitrogen sources in wastewaters biotreatment. The maximum nitrogen concentration able to sustain the batch growth of this microalga without inhibition was 1.7 mM in both cases. Ammonium chloride was limiting for the growth at lower concentrations, whereas inhibition took place at higher levels. This inhibition effect was less marked with urea, likely because the enzymatic hydrolysis of this compound by urease controlled the ammonia transfer into the cell. Fed-batch experiments carried out by pulse-feeding either ammonium or urea proved that the use of these compounds as nitrogen sources can sustain the long term-cultivation of S. platensis, provided that the conditions for their feeding are accurately optimized.

DOI: 10.1007/s10295-005-0025-8
PubMed: 16175408

Affiliations:

Italie

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Le document en format XML

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<author><name sortKey="Converti, A" sort="Converti, A" uniqKey="Converti A" first="A" last="Converti">A. Converti</name>
<affiliation wicri:level="1"><nlm:affiliation>Department of Chemical and Process Engineering, G.B. Bonino, Via Opera Pia 15, 16145, Genoa, Italy. converti@unige.it</nlm:affiliation>
<country xml:lang="fr">Italie</country>
<wicri:regionArea>Department of Chemical and Process Engineering, G.B. Bonino, Via Opera Pia 15, 16145, Genoa</wicri:regionArea>
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<author><name sortKey="Scapazzoni, S" sort="Scapazzoni, S" uniqKey="Scapazzoni S" first="S" last="Scapazzoni">S. Scapazzoni</name>
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<author><name sortKey="Lodi, A" sort="Lodi, A" uniqKey="Lodi A" first="A" last="Lodi">A. Lodi</name>
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<author><name sortKey="Carvalho, J C M" sort="Carvalho, J C M" uniqKey="Carvalho J" first="J C M" last="Carvalho">J C M. Carvalho</name>
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<front><div type="abstract" xml:lang="en">Different concentrations either of ammonium chloride or urea were used in batch and fed-batch cultivations of Spirulina platensis to evaluate the possibility of substituting nitrate by cheaper reduced nitrogen sources in wastewaters biotreatment. The maximum nitrogen concentration able to sustain the batch growth of this microalga without inhibition was 1.7 mM in both cases. Ammonium chloride was limiting for the growth at lower concentrations, whereas inhibition took place at higher levels. This inhibition effect was less marked with urea, likely because the enzymatic hydrolysis of this compound by urease controlled the ammonia transfer into the cell. Fed-batch experiments carried out by pulse-feeding either ammonium or urea proved that the use of these compounds as nitrogen sources can sustain the long term-cultivation of S. platensis, provided that the conditions for their feeding are accurately optimized.</div>
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<ArticleTitle>Ammonium and urea removal by Spirulina platensis.</ArticleTitle>
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<Abstract><AbstractText>Different concentrations either of ammonium chloride or urea were used in batch and fed-batch cultivations of Spirulina platensis to evaluate the possibility of substituting nitrate by cheaper reduced nitrogen sources in wastewaters biotreatment. The maximum nitrogen concentration able to sustain the batch growth of this microalga without inhibition was 1.7 mM in both cases. Ammonium chloride was limiting for the growth at lower concentrations, whereas inhibition took place at higher levels. This inhibition effect was less marked with urea, likely because the enzymatic hydrolysis of this compound by urease controlled the ammonia transfer into the cell. Fed-batch experiments carried out by pulse-feeding either ammonium or urea proved that the use of these compounds as nitrogen sources can sustain the long term-cultivation of S. platensis, provided that the conditions for their feeding are accurately optimized.</AbstractText>
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Ammonium and urea removal by Spirulina platensis.

Ammonium and urea removal by Spirulina platensis.

Source :

English descriptors

Abstract

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