Nitrification rates in a saline medium at different dissolved oxygen concentrations
A kinetic study was carried out in a saline medium to assess the effect of O^sub 2^ on the two-step nitrification process: for the first nitritation step, 2-26 mg dissolved O^sub 2^ (DO) l^sup -1^ was used and for the second nitratation step, 0.5-24 mg DO l^sup -1^ was used. Nitritation rate was mea...
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| Veröffentlicht in: | Biotechnology letters 2001-10, Vol.23 (19), p.1597-1602 |
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| creator | SANCHEZ, Omar MARTI, Maria C ASPC, Estrella ROECKEL, Marlene |
| description | A kinetic study was carried out in a saline medium to assess the effect of O^sub 2^ on the two-step nitrification process: for the first nitritation step, 2-26 mg dissolved O^sub 2^ (DO) l^sup -1^ was used and for the second nitratation step, 0.5-24 mg DO l^sup -1^ was used. Nitritation rate was measured in the presence of sodium azide so as to inhibit nitratation. Ammonia-oxidizing (AOB) and nitrite-oxidizing (NOB) bacterial in the mixed culture were determined by 16 S rRNA hybridization. The affinity constants for oxygen O^sub 2^ of the AOB and the NOB were 1.66 mg O^sub 2^ l^sup -1^ and 3 mg O^sub 2^ l^sup -1^ respectively. The larger than the previously reported values of these constants might be due to the high salt content in the medium. High O^sub 2^ concentrations did inhibit the nitrification rate.[PUBLICATION ABSTRACT] |
| doi_str_mv | 10.1023/A:1011977629398 |
| format | Article |
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Nitritation rate was measured in the presence of sodium azide so as to inhibit nitratation. Ammonia-oxidizing (AOB) and nitrite-oxidizing (NOB) bacterial in the mixed culture were determined by 16 S rRNA hybridization. The affinity constants for oxygen O^sub 2^ of the AOB and the NOB were 1.66 mg O^sub 2^ l^sup -1^ and 3 mg O^sub 2^ l^sup -1^ respectively. The larger than the previously reported values of these constants might be due to the high salt content in the medium. High O^sub 2^ concentrations did inhibit the nitrification rate.[PUBLICATION ABSTRACT]</description><identifier>ISSN: 0141-5492</identifier><identifier>EISSN: 1573-6776</identifier><identifier>DOI: 10.1023/A:1011977629398</identifier><identifier>CODEN: BILED3</identifier><language>eng</language><publisher>Dordrecht: Springer</publisher><subject>ammonia ; Biological and medical sciences ; Biological treatment of waters ; Biotechnology ; Dissolved oxygen ; Environment and pollution ; Fundamental and applied biological sciences. Psychology ; Industrial applications and implications. 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Nitritation rate was measured in the presence of sodium azide so as to inhibit nitratation. Ammonia-oxidizing (AOB) and nitrite-oxidizing (NOB) bacterial in the mixed culture were determined by 16 S rRNA hybridization. The affinity constants for oxygen O^sub 2^ of the AOB and the NOB were 1.66 mg O^sub 2^ l^sup -1^ and 3 mg O^sub 2^ l^sup -1^ respectively. The larger than the previously reported values of these constants might be due to the high salt content in the medium. High O^sub 2^ concentrations did inhibit the nitrification rate.[PUBLICATION ABSTRACT]</description><subject>ammonia</subject><subject>Biological and medical sciences</subject><subject>Biological treatment of waters</subject><subject>Biotechnology</subject><subject>Dissolved oxygen</subject><subject>Environment and pollution</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Industrial applications and implications. 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Psychology</topic><topic>Industrial applications and implications. 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Nitritation rate was measured in the presence of sodium azide so as to inhibit nitratation. Ammonia-oxidizing (AOB) and nitrite-oxidizing (NOB) bacterial in the mixed culture were determined by 16 S rRNA hybridization. The affinity constants for oxygen O^sub 2^ of the AOB and the NOB were 1.66 mg O^sub 2^ l^sup -1^ and 3 mg O^sub 2^ l^sup -1^ respectively. The larger than the previously reported values of these constants might be due to the high salt content in the medium. High O^sub 2^ concentrations did inhibit the nitrification rate.[PUBLICATION ABSTRACT]</abstract><cop>Dordrecht</cop><pub>Springer</pub><doi>10.1023/A:1011977629398</doi><tpages>6</tpages></addata></record> |
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| subjects | ammonia Biological and medical sciences Biological treatment of waters Biotechnology Dissolved oxygen Environment and pollution Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Nitrification rRNA 16S sodium azide |
| title | Nitrification rates in a saline medium at different dissolved oxygen concentrations |
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