Ammonium and urea removal by Spirulina platensis.
Identifieur interne : 001819 ( Main/Exploration ); précédent : 001818; suivant : 001820Ammonium and urea removal by Spirulina platensis.
Auteurs : A. Converti [Italie] ; S. Scapazzoni ; A. Lodi ; J C M. CarvalhoSource :
- Journal of industrial microbiology & biotechnology [ 1367-5435 ] ; 2006.
English descriptors
- KwdEn :
- 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:
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Le document en format XML
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Lodi</name></author><author><name sortKey="Carvalho, J C M" sort="Carvalho, J C M" uniqKey="Carvalho J" first="J C M" last="Carvalho">J C M. 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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><wicri:noRegion>Genoa</wicri:noRegion></affiliation></author><author><name sortKey="Scapazzoni, S" sort="Scapazzoni, S" uniqKey="Scapazzoni S" first="S" last="Scapazzoni">S. Scapazzoni</name></author><author><name sortKey="Lodi, A" sort="Lodi, A" uniqKey="Lodi A" first="A" last="Lodi">A. Lodi</name></author><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></author></analytic><series><title level="j">Journal of industrial microbiology & biotechnology</title><idno type="ISSN">1367-5435</idno><imprint><date when="2006" type="published">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ammonia (metabolism)</term><term>Bacterial Proteins (metabolism)</term><term>Cyanobacteria (drug effects)</term><term>Cyanobacteria (growth & development)</term><term>Cyanobacteria (metabolism)</term><term>Industrial Microbiology</term><term>Kinetics</term><term>Nitrates (metabolism)</term><term>Nitrogen (metabolism)</term><term>Spirulina</term><term>Urea (metabolism)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Ammonia</term><term>Bacterial Proteins</term><term>Nitrates</term><term>Nitrogen</term><term>Urea</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Cyanobacteria</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Cyanobacteria</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Cyanobacteria</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Industrial Microbiology</term><term>Kinetics</term><term>Spirulina</term></keywords></textClass></profileDesc></teiHeader><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></front></TEI><affiliations><list><country><li>Italie</li></country></list><tree><noCountry><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><name sortKey="Lodi, A" sort="Lodi, A" uniqKey="Lodi A" first="A" last="Lodi">A. Lodi</name><name sortKey="Scapazzoni, S" sort="Scapazzoni, S" uniqKey="Scapazzoni S" first="S" last="Scapazzoni">S. Scapazzoni</name></noCountry><country name="Italie"><noRegion><name sortKey="Converti, A" sort="Converti, A" uniqKey="Converti A" first="A" last="Converti">A. Converti</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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