scholarly journals Potentials of utilizing renewable resources of agriculture residues for the biosynthesis of bacterial cellulose nanofibers

2021 ◽  
Author(s):  
Amir Jalal Sani
Keyword(s):  
Bacterial Cellulose ◽  
Shake Flask ◽  
Draft Tube ◽  
Cellulose Nanofibers ◽  
Maximum Yield ◽  
Agricultural Residues ◽  
Stirred Tank ◽  
Culture Methods ◽  
Sugar Mixtures ◽  
Airlift Bioreactors

In the present study, production of bacterial cellulose nanofibers from single sugars and sugar mixtures in feedstock was investigated using different culture methods. This includes production in shake flask, stirred tank and draft tube airlift bioreactors. There has been no previous work done other than this reported work concerning production of bacterial cellulose nanofibers using sugar mixtures. Fructose was found to be the top producer with 5.65 g/L of bacterial cellulose nanofibers. The different compositions of sugar mixtures tested in this study were identical to acid hydrolyzates of agricultural residues. Maximum yield of 17.72 g/L was observed with mixture that resembles the acid hydrolyzate of wheat straw. Modified stirred tank and airlift bioreactors showed higher production of bacterial cellulose nanofibers compared to shake flask. In general, results obtained in the present study demonstrate potential of improving production of nanofibers solely based on agricultural residues and using draft tube airlift bioreactors.

scholarly journals Potentials of utilizing renewable resources of agriculture residues for the biosynthesis of bacterial cellulose nanofibers

2021 ◽  
Author(s):  
Amir Jalal Sani
Keyword(s):  
Bacterial Cellulose ◽  
Shake Flask ◽  
Draft Tube ◽  
Cellulose Nanofibers ◽  
Maximum Yield ◽  
Agricultural Residues ◽  
Stirred Tank ◽  
Culture Methods ◽  
Sugar Mixtures ◽  
Airlift Bioreactors

In the present study, production of bacterial cellulose nanofibers from single sugars and sugar mixtures in feedstock was investigated using different culture methods. This includes production in shake flask, stirred tank and draft tube airlift bioreactors. There has been no previous work done other than this reported work concerning production of bacterial cellulose nanofibers using sugar mixtures. Fructose was found to be the top producer with 5.65 g/L of bacterial cellulose nanofibers. The different compositions of sugar mixtures tested in this study were identical to acid hydrolyzates of agricultural residues. Maximum yield of 17.72 g/L was observed with mixture that resembles the acid hydrolyzate of wheat straw. Modified stirred tank and airlift bioreactors showed higher production of bacterial cellulose nanofibers compared to shake flask. In general, results obtained in the present study demonstrate potential of improving production of nanofibers solely based on agricultural residues and using draft tube airlift bioreactors.

scholarly journals Influence of biological origin on the tensile properties of cellulose nanopapers

Cellulose ◽  
2021 ◽  
Author(s):  
Katri S. Kontturi ◽  
Koon-Yang Lee ◽  
Mitchell P. Jones ◽  
William W. Sampson ◽  
Alexander Bismarck ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cell Wall ◽  
Bacterial Cellulose ◽  
Raw Materials ◽  
Cellulose Nanofibers ◽  
Nanofibrillated Cellulose ◽  
Primary Cell Wall ◽  
Biological Origin ◽  
Basic Principles ◽  
Fiber Mats

Abstract Cellulose nanopapers provide diverse, strong and lightweight templates prepared entirely from sustainable raw materials, cellulose nanofibers (CNFs). Yet the strength of CNFs has not been fully capitalized in the resulting nanopapers and the relative influence of CNF strength, their bonding, and biological origin to nanopaper strength are unknown. Here, we show that basic principles from paper physics can be applied to CNF nanopapers to illuminate those relationships. Importantly, it appeared that ~ 200 MPa was the theoretical maximum for nanopapers with random fibril orientation. Furthermore, we demonstrate the contrast in tensile strength for nanopapers prepared from bacterial cellulose (BC) and wood-based nanofibrillated cellulose (NFC). Endemic amorphous polysaccharides (hemicelluloses) in NFC act as matrix in NFC nanopapers, strengthening the bonding between CNFs just like it improves the bonding between CNFs in the primary cell wall of plants. The conclusions apply to all composites containing non-woven fiber mats as reinforcement. Graphic abstract

Surface Modification of Bacterial Cellulose Nanofibers for Property Enhancement of Optically Transparent Composites:  Dependence on Acetyl-Group DS

2007 ◽  
Vol 8 (6) ◽  
pp. 1973-1978 ◽  
Author(s):  
Shinsuke Ifuku ◽  
Masaya Nogi ◽  
Kentaro Abe ◽  
Keishin Handa ◽  
Fumiaki Nakatsubo ◽  
...  
Keyword(s):  
Surface Modification ◽  
Bacterial Cellulose ◽  
Cellulose Nanofibers ◽  
Optically Transparent ◽  
Acetyl Group ◽  
Transparent Composites

Comparative study of paper and nanopaper properties prepared from bacterial cellulose nanofibers and fibers/ground cellulose nanofibers of canola straw

2013 ◽  
Vol 43 ◽  
pp. 732-737 ◽  
Author(s):  
Hossein Yousefi ◽  
Mehdi Faezipour ◽  
Sahab Hedjazi ◽  
Mohammad Mazhari Mousavi ◽  
Yoshio Azusa ◽  
...  
Keyword(s):  
Comparative Study ◽  
Bacterial Cellulose ◽  
Cellulose Nanofibers ◽  
Canola Straw

Performance of airlift bioreactors with net draft tube

2003 ◽  
Vol 33 (4) ◽  
pp. 332-342 ◽  
Author(s):  
Chun-Chong Fu ◽  
Wen-Teng Wu ◽  
Shih-Yuan Lu
Keyword(s):  
Draft Tube ◽  
Airlift Bioreactors

scholarly journals Influence of Light Intensity and Temperature on Cultivation of Microalgae Desmodesmus Communis in Flasks and Laboratory-Scale Stirred Tank Photobioreactor

2015 ◽  
Vol 52 (2) ◽  
pp. 59-70 ◽  
Author(s):  
J. Vanags ◽  
L. Kunga ◽  
K. Dubencovs ◽  
V. Galvanauskas ◽  
O. Grīgs
Keyword(s):  
Light Intensity ◽  
Shake Flask ◽  
Scale Up ◽  
Biomass Concentration ◽  
Biomass Productivity ◽  
Pilot Scale ◽  
Laboratory Scale ◽  
Stirred Tank ◽  
Light Limitation ◽  
Maximum Biomass

Abstract Optimization of the microalgae cultivation process and of the bioprocess in general traditionally starts with cultivation experiments in flasks. Then the scale-up follows, when the process from flasks is transferred into a laboratory-scale bioreactor, in which further experiments are performed before developing the process in a pilot-scale reactor. This research was done in order to scale-up the process from a 0.4 1 shake flask to a 4.0 1 laboratory-scale stirred-tank photobioreactor for the cultivation of Desmodesmus (D.) communis microalgae. First, the effect of variation in temperature (21-29 ºC) and in light intensity (200-600 μmol m-2s-1) was studied in the shake-flask experiments. It was shown that the best results (the maximum biomass concentration of 2.72 g 1-1 with a specific growth rate of 0.65 g g-1d-1) can be achieved at the cultivation temperature and light intensity being 25 °C and 300 μmol m2s-1, respectively. At the same time, D. communis cultivation under the same conditions in stirred-tank photobioreactor resulted in average volumetric productivities of biomass due to the light limitation even when the light intensity was increased during the experiment (the maximum biomass productivity 0.25 g 1-1d-1; the maximum biomass concentration 1.78 g 1-1).

scholarly journals Nitrogen, Phosphorus and Sulfur Co-Doped Pyrolyzed Bacterial Cellulose Nanofibers for Supercapacitors

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1912
Author(s):  
Zheng Li ◽  
Yaogang Wang ◽  
Wen Xia ◽  
Jixian Gong ◽  
Shiru Jia ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
High Performance ◽  
Electrode Materials ◽  
Cellulose Nanofibers ◽  
Electrochemical Performances ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
Nitrogen Phosphorus ◽  
Co Doped

Heteroatom doping is an effective way to raise the electrochemical properties of carbon materials. In this paper, a novel electrode material including nitrogen, phosphorus, and sulfur co-doped pyrolyzed bacterial cellulose (N/P/S-PBC) nanofibers was produced. The morphologies, structure characteristics and electrochemical performances of the materials were investigated by Scanning electron microscopy, Fourier transform infrared spectra, X-ray diffraction patterns, X-ray photoelectronic spectroscopy, N2 sorption analysis and electrochemical measurements. When 3.9 atom% of nitrogen, 1.22 atom% of phosphorus and 0.6 atom% of sulfur co-doped into PBC, the specific capacitance of N/P/S-PBC at 1.0 A/g was 255 F/g and the N/P/S-PBC supercapacitors’ energy density at 1 A/g was 8.48 Wh/kg with a power density of 489.45 W/kg, which were better than those of the N/P-PBC and N/S-PBC supercapacitors. This material may be a very good candidate as the promising electrode materials for high-performance supercapacitors.

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