Simultaneous use of urea and potassium nitrate for Arthrospira (Spirulina) platensis cultivation

被引：14
|
作者：
Vieira, Denise C. M. [1 ]
Matsudo, Marcelo C. [1 ]
Sato, Sunao [1 ]
Converti, Attilio [2 ]
de Carvalho, Joao C. M. [1 ]
机构：
[1] Univ Sao Paulo, Fac Pharmaceut Sci, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, Brazil
[2] Univ Genoa, Dept Chem & Proc Engn GB Bonino, Genoa, Italy
来源：
BIOTECHNOLOGY JOURNAL | 2012年 / 7卷 / 05期
基金：
巴西圣保罗研究基金会;
关键词：
Arthrospira (Spirulina) platensis; Fed-batch process; Microbial biomass; Potassium nitrate; Urea; FED-BATCH CULTIVATION; NITROGEN-SOURCE; AMMONIUM-CHLORIDE; GREEN; LIGHT; PH; ALGAE; CO2;
D O I：
10.1002/biot.201100203
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
Urea has been considered as a promising alternative nitrogen source for the cultivation of Arthrospira platensis if it is possible to avoid ammonia toxicity; however, this procedure can lead to periods of nitrogen shortage. This study shows that the addition of potassium nitrate, which acts as a nitrogen reservoir, to cultivations carried out with urea in a fed-batch process can increase the maximum cell concentration (Xm) and also cell productivity (PX). Using response surface methodology, the model indicates that the estimated optimum Xm can be achieved with 17.3 mM potassium nitrate and 8.9 mM urea. Under this condition an Xm of 6077 +/- 199 mg/L and a PX of 341.5 +/- 19.1 mg L1day1 were obtained.
引用
收藏
页码：649 / 655
页数：7
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