Second generation bioethanol production at high gravity of pilot-scale pretreated wheat straw employing newly isolated thermotolerant yeast Kluyveromyces marxianus DBTIOC-35

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37485-37494 ◽  
Author(s):  
Jitendra Kumar Saini ◽  
Ruchi Agrawal ◽  
Alok Satlewal ◽  
Reetu Saini ◽  
Ravi Gupta ◽  
...  
Keyword(s):  
Kluyveromyces Marxianus ◽  
Biomass Concentration ◽  
Pilot Scale ◽  
Process Time ◽  
High Gravity ◽  
Thermotolerant Yeast ◽  
Second Generation Bioethanol ◽  
P Application ◽  
Pretreated Wheat Straw ◽  
High Biomass Concentration

Application of thermotolerant yeast Kluyveromyces marxianus DBTIOC-35 in SSF decreases overall process time, and increases productivity and yield by allowing elimination of presaccharification step and use of high biomass concentration, respectively.

scholarly journals Effect of magnetic field on biomass properties and their role in biodegradation under condition of low dissolved oxygen

2021 ◽  
Vol 11 (7) ◽  
Author(s):  
Nur Syamimi Zaidi ◽  
Johan Sohaili ◽  
Khalida Muda ◽  
Mika Sillanpää ◽  
Norelyza Hussein
Keyword(s):  
Magnetic Field ◽  
Dissolved Oxygen ◽  
Biomass Concentration ◽  
Aerobic Bacteria ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Great Chance ◽  
Sludge Bulking ◽  
The Magnetic Field ◽  
High Biomass Concentration

AbstractLow condition of dissolved oxygen (DO) is commonly associated with sludge bulking problem that was able to disrupt the efficiency of wastewater treatment performances. Relatively, very little attention was paid to the possibility of applying magnetic field in controlling the bulking problem. Hence, this study aims to investigate the performance of magnetic field on biomass properties and its effect on biodegradation under low condition of DO. Two continuous laboratory-scale sequencing batch reactors—Reactor A (SBRA) and Reactor B (SBRB)—were setup. SBRA was equipped with the magnetic device to exhibit magnetic field of 88 mT, while SBRB acted as a control system. The results showed that the biomass concentration in SBRA was higher compared to SBRB. High biomass concentration in SBRA resulted to better settleability with mean SVI of less than 30 mL/g. SBRA also showed consistently high removal performances of organic and inorganic contents compared to SBRB. These observations confirmed that the magnetic field was able to enhance the biomass properties, which further enhance the biodegradation ability of the aerobic bacteria under low DO condition. This also indicates that under the sludge bulking circumstances, the use of magnetic field stands a great chance in maintaining high biodegradation of the treatment system.

scholarly journals Correction to: Transcriptome analysis of the thermotolerant yeast Kluyveromyces marxianus CCT 7735 under ethanol stress

2021 ◽  
Author(s):  
Raphael Hermano Santos Diniz ◽  
Juan C. Villada ◽  
Mariana Caroline Tocantins Alvim ◽  
Pedro Marcus Pereira Vidigal ◽  
Nívea Moreira Vieira ◽  
...  
Keyword(s):  
Transcriptome Analysis ◽  
Kluyveromyces Marxianus ◽  
Ethanol Stress ◽  
Thermotolerant Yeast

scholarly journals Thermotolerant Yeast Kluyveromyces marxianus Reveals More Tolerance to Heat Shock than the Brewery Yeast Saccharomyces cerevisiae

2018 ◽  
Vol 23 (3) ◽  
pp. 133-138 ◽  
Author(s):  
IZUMI MATSUMOTO ◽  
TAKAHIRO ARAI ◽  
YUI NISHIMOTO ◽  
VICHAI LEELAVATCHARAMAS ◽  
MASAKAZU FURUTA ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Heat Shock ◽  
Kluyveromyces Marxianus ◽  
Thermotolerant Yeast ◽  
Brewery Yeast

Functional analysis of Mig1 and Rag5 as expressional regulators in thermotolerant yeast Kluyveromyces marxianus

2018 ◽  
Vol 103 (1) ◽  
pp. 395-410 ◽  
Author(s):  
Mochamad Nurcholis ◽  
Sukanya Nitiyon ◽  
Suprayogi ◽  
Nadchanok Rodrussamee ◽  
Noppon Lertwattanasakul ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Kluyveromyces Marxianus ◽  
Thermotolerant Yeast

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 Second-Generation Lignocellulosic Supportive Material Improves Atomic Ratios of C:O and H:O and Thermomechanical Behavior of Hybrid Non-Woody Pellets

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4219
Author(s):  
Bruno Rafael de Almeida Moreira ◽  
Ronaldo da Silva Viana ◽  
Victor Hugo Cruz ◽  
Anderson Chagas Magalhães ◽  
Celso Tadao Miasaki ◽  
...  
Keyword(s):  
Second Generation ◽  
Mechanical Stability ◽  
Pilot Scale ◽  
Preliminary Evidence ◽  
Thermomechanical Behavior ◽  
Wood Pellets ◽  
Residual Biomass ◽  
Second Generation Bioethanol ◽  
Solid Biofuels ◽  
And Storage

Pellets refer to solid biofuels for heating and power. The pellet’s integrity is of great relevant to ensure safe and effective transportation and storage, and comfort to stakeholders. Several materials that are supportive, whether organic and inorganic, to pellets exist. However, no work in the literature is linking making hybrid non-wood pellets with addition of residual biomass from distillation of cellulosic bioethanol, and this requires further investigations. Figuring out how effective this challenging agro-industrial residue could be for reinforcing non-wood pellets is accordingly the scientific point of this study focusing on management of waste and valorization of biomass. The pilot-scale manufacturing of hybrid pellets consisted of systematically pressing sugarcane bagasse with the lignocellulosic reinforcement at the mass ratios of 3:1, 1:1, and 1:3 on an automatic pelletizer machine at 200 MPa and 125 °C. Elemental contents of C and H, durability, and energy density all increased significantly from 50.05 to 53.50%, 5.95 to 7.80%, 95.90 to 99.55%, and 28.20 to 31.20 MJ kg−1, respectively, with blending the starting material with the reinforcement at 1:3. Preliminary evidence of residual biomass from distillation of second-generation bioethanol capable of highly improving molecular flammable/combustible properties, mechanical stability, and fuel power of composite non-wood pellets exist.

Some observations on the effects of accumulated benthic sludge on the behaviour of waste stabilisation ponds

2005 ◽  
Vol 51 (12) ◽  
pp. 217-226
Author(s):  
C.J. Banks ◽  
S. Heaven ◽  
E.A. Zotova
Keyword(s):  
Light Intensity ◽  
Dissolved Oxygen ◽  
Water Column ◽  
Suspended Solids ◽  
Biomass Concentration ◽  
Pilot Scale ◽  
Controlling Factor ◽  
Waste Stabilisation Ponds ◽  
Nutrient Levels ◽  
Complex Mechanisms

The effect of accumulated bottom sludge on water column characteristics was studied in two pilot-scale ponds. Parameters measured were ammonia, nitrate, phosphate, COD, suspended solids, dissolved oxygen (DO), temperature and light intensity. The de-sludged pond showed a stronger correlation between DO, light intensity, nutrients and suspended solids with the controlling factor being availability of nitrogen. This was less apparent in the pond with sludge where nutrient levels were higher and more complex mechanisms controlled biomass concentration. Water column characteristics in the two ponds converged rapidly in 7–10 weeks, however, due to accumulation of fresh sludge.

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