Effect of lactate on bacterial cellulose production from fructose in continuous culture

Naritomi, Takaaki; Kouda, Tohru; Yano, Hisato; Yoshinaga, Fumihiro

doi:10.1016/s0922-338x(97)80360-1

Cited by 80 publications

(41 citation statements)

References 26 publications

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“…According to Naritomi, the ATP content of viable cells growing on the lactate-supplemented medium was maintained at a higher level than that of cells growing on the no-lactate-supplemented medium (Naritomi et al 1998). In this study, The quantity of used nitrogen source corresponds to nitrogen content of 25.0 g l -1 yeast extract.…”

Section: Fed-batch Culture With Lactate Supplementationmentioning

confidence: 85%

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Lactate increases coenzyme Q10 production by Agrobacterium tumefaciens

Kim

Seo

et al. 2007

World J Microbiol Biotechnol

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Section: Fed-batch Culture With Lactate Supplementationmentioning

confidence: 85%

“…Lactate has been reported to influence the content of some metabolites (Matsuoka et al 1996;Naritomi et al 1998), is economical and easy to deliver during liquid fermentation. However, its effect on CoQ 10 production has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Lactate increases coenzyme Q10 production by Agrobacterium tumefaciens

Kim

Seo

et al. 2007

World J Microbiol Biotechnol

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“…Of all, adding appropriate stimulatory factors has received much attention for its simplicity and already observed significant effects on BC production. At present, studies on stimulatory factors mainly focus on ethanol (Naritomi et al 1998a), organic acids (Embuscado et al 1994;Toda et al 1997;Naritomi et al 1998b), Water-Soluble Polysaccharides (Bae et al 2004;Ishida et al 2003), and lignin sulfonate (Keshk and Sameshima 2006). Among them, ethanol has been shown to be a good stimulatory factor for BC production, and the underlying mechanism has also been investigated (Yunoki et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Effects of alcohols on bacterial cellulose production by Acetobacter xylinum 186

Zhang

Chi

et al. 2011

World J Microbiol Biotechnol

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To improve the yield of cellulose production in bacteria, we investigated the stimulatory effects of six different alcohols during fermentation of Acetobacter xylinum 186. Our study showed that after static fermentation at 30°C for 6 days, bacterial culture with 1.0% (v/v) of methanol added in the medium produced the highest bacterial cellulose (BC) yield at 103.5 mg/100 ml, which was 21.8% higher than the control group. Addition of 0.5% of ethylene glycol in the culture yielded 105.5 mg/100 ml BC, 24.1% higher than the control group. Adding 0.5% of n-propanol yielded 96.4 mg/100 ml BC, 13.4% higher; 3.0% of glycerol yielded 108.3 mg/100 ml BC, 27.4% higher; 0.5% of n-butanol yielded 132.6 mg/100 ml BC, 56.0% higher; and 4.0% of mannitol in the culture yielded 125.2 mg/100 ml BC, 47.3% higher, respectively. The rate of bacterial cellulose production increased with the growth rate of the bacteria. The stimulatory effects of these alcohols that we observed were significant in the later stage of fermentation, which was considered to be important for the biosynthesis of bacterial cellulose.

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“…For this reason, the static culture method has been used to obtain BC in spite of low productivity, long culture time, and great labor power. To overcome these problems and to produce BC on an industrial scale, various studies have been conducted, such as the selection of microbes which are genetically stable, developing the culture medium, and adding lactate, pyruvate, ethanol, etc., to the culture medium [4,5]. Studies on the microbial culture and on the control of operating conditions to reduce BC production cost are still continuing.…”

Section: Introductionmentioning

confidence: 99%

Properties of bacterial cellulose produced in a pilot-scale spherical type bubble column bioreactor

Choi

Song

Kim

et al. 2009

Korean J. Chem. Eng.

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The saccharogenic liquid obtained by the enzymatic saccharification of food wastes was used as a medium for production of bacterial cellulose (BC). The enzymatic saccharification of food wastes (SFW) was carried out by the cultivation supernatant of Trichoderma inhamatum KSJ1. 5.6 g/L of BC was produced in a new modified 50 L bubble column bioreactor by Acetobacter xylinum KJ1. The productivity was similar to that of a modified 10 L bubble column bioreactor (5.8 g/L). When pure oxygen was supplied into the scaled-up culture conditions, 6.8 g/L (12% enhancement) of BC was produced, indicating a very useful method for BC mass production. The oxygen uptake rate (OUR) and q O2 (specific oxygen uptake rate) were 0.214 mg-DO/L·min and 0.257 mg-DO/g-cell·min, respectively. The physical properties, such as morphology, molecular weight, crystallinity, and tensile strength of BCs produced in static culture (A), 10 L (B) and 50 L (C) modified bubble column cultures were investigated. All BCs showed fibrils with highly networking structure. The number average molecular weight of BCs in A, B and C was 2,314,000, 1,878,000, and 1,765,000, respectively. All of the BCs had a form of cellulose I representing pure cellulose. The relative degree of crystallinity showed the range of 79.6-86.0%. Tensile strengths of BC sheet in A, B and C were 1.75, 1.21, and 1.19 kg/mm 2 , respectively. In conclusion, BC production by the modified bubble column culture mode of 50 L brought more favorable results in terms of the physical properties and its ease of scale-up.

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Effect of lactate on bacterial cellulose production from fructose in continuous culture

Cited by 80 publications

References 26 publications

Lactate increases coenzyme Q10 production by Agrobacterium tumefaciens

Lactate increases coenzyme Q10 production by Agrobacterium tumefaciens

Effects of alcohols on bacterial cellulose production by Acetobacter xylinum 186

Properties of bacterial cellulose produced in a pilot-scale spherical type bubble column bioreactor

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