scholarly journals Influence of Liquid-to-Gas Ratio on the Syngas Fermentation Efficiency: An Experimental Approach

2020 ◽  
Vol 7 (4) ◽  
pp. 138
Author(s):  
Spyridon Achinas ◽  
Sytse Jelmer Mulder ◽  
Gerrit Jan Willem Euverink
Keyword(s):  
Microbial Community ◽  
Carbon Source ◽  
Sole Carbon Source ◽  
Experimental Approach ◽  
Complete Conversion ◽  
Fed Batch ◽  
Syngas Fermentation ◽  
Fermentation Efficiency ◽  
Anaerobic Microbial Community ◽  
Gas Ratio

Syngas fermentation by methanogens is a novel process to purify biogas. Methanogens are able to ferment non-desirable CO2, H2, and CO to methane. However, to use methanogens on an industrial scale, more research has to be done. There are studies that discuss the growth of methanogens on syngas in combination with acetate. In this research, growth of methanogens on syngas as sole carbon source is discussed. Effluent of an anaerobic fed-batch was selectively cultivated with syngas in 400 mL Eppendorf© bioreactors. After a period of 7 days, fifteen 120 mL flasks were filled with three different liquid-to-gas ratios (1:1, 1:3, 1:5). Results showed that different liquid-to-gas ratios change the metabolic preference of the anaerobic microbial community. Moreover, complete conversion in a four-to-eight-day period, via the carboxidotrophic pathway, was observed in all three liquid-to-gas ratios.

scholarly journals Enhanced lipid production by Rhodosporidium toruloides using different fed-batch feeding strategies with lignocellulosic hydrolysate as the sole carbon source

2016 ◽  
Vol 9 (1) ◽  
Author(s):  
Qiang Fei ◽  
Marykate O’Brien ◽  
Robert Nelson ◽  
Xiaowen Chen ◽  
Andrew Lowell ◽  
...  
Keyword(s):  
Carbon Source ◽  
Sole Carbon Source ◽  
Lipid Production ◽  
Rhodosporidium Toruloides ◽  
Feeding Strategies ◽  
Fed Batch ◽  
Lignocellulosic Hydrolysate

scholarly journals Effects of ammonia on propionate degradation and microbial community in digesters using propionate as a sole carbon source

2017 ◽  
Vol 92 (10) ◽  
pp. 2538-2545 ◽  
Author(s):  
Ying Li ◽  
Yue Zhang ◽  
Xiaoying Kong ◽  
Lianhua Li ◽  
Zhenhong Yuan ◽  
...  
Keyword(s):  
Microbial Community ◽  
Carbon Source ◽  
Sole Carbon Source ◽  
Propionate Degradation

scholarly journals Functional Diversity of the Microbial Community in Healthy Subjects and Periodontitis Patients Based on Sole Carbon Source Utilization

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e91977 ◽  
Author(s):  
Yifei Zhang ◽  
Yunfei Zheng ◽  
Jianwei Hu ◽  
Ning Du ◽  
Feng Chen
Keyword(s):  
Microbial Community ◽  
Carbon Source ◽  
Functional Diversity ◽  
Healthy Subjects ◽  
Sole Carbon Source ◽  
Carbon Source Utilization ◽  
Sole Carbon Source Utilization

The use of babassu oil as substrate to produce bioemulsifiers byCandida lipolytica

1999 ◽  
Vol 45 (5) ◽  
pp. 423-426 ◽  
Author(s):  
L A Sarubbo ◽  
ALF Porto ◽  
G M Campos-Takaki
Keyword(s):  
Carbon Source ◽  
Sole Carbon Source ◽  
Candida Lipolytica ◽  
Fed Batch ◽  
Emulsification Activity ◽  
Babassu Oil

Candida lipolytica IA 1055 produced an extracellular emulsifier when using babassu oil as its sole carbon source during batch and fed batch fermentations at 27°C. Emulsification activity was detected after 60 h of growth in all conditions studied. The bioemulsifier was isolated after 144 h of fermentation from the best condition studied. The biopolymer seems to be a polysaccharide-protein-lipid complex.Key words: bioemulsifiers, biopolymer, Candida lipolytica, babassu oil, fermentation.

scholarly journals Efficient Removal of Butachlor and Change in Microbial Community Structure in Single-Chamber Microbial Fuel Cells

2019 ◽  
Vol 16 (20) ◽  
pp. 3897
Author(s):  
Xiaojing Li ◽  
Yue Li ◽  
Lixia Zhao ◽  
Yang Sun ◽  
Xiaolin Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Community Structure ◽  
Microbial Community ◽  
Carbon Source ◽  
Microbial Community Structure ◽  
Microbial Fuel Cells ◽  
Sodium Acetate ◽  
Sole Carbon Source ◽  
High Throughput Sequencing ◽  
Single Chamber

Microbial electrochemical technology provides an inexhaustible supply of electron acceptors, allowing electroactive microorganisms to generate biocurrent and accelerate the removal of organics. The treatment of wastewater contaminated by butachlor, which is a commonly used chloroacetamide herbicide in paddy fields, is a problem in agricultural production. In this study, butachlor was found to be removed efficiently (90 ± 1%) and rapidly (one day) in constructed single-chamber microbial fuel cells (MFCs). After the addition of sodium acetate to MFCs with butachlor as the sole carbon source, electricity generation was recovered instead of increasing the degradation efficiency of butachlor. Meanwhile, the microbial community structure was changed in anodic and cathodic biofilms after the addition of butachlor, following the bioelectrochemical degradation of butachlor. High-throughput sequencing showed the proliferation of Paracoccus and Geobacter in MFCs with butachlor as the sole carbon source and of Thauera butanivorans in MFCs with butachlor and sodium acetate as concomitant carbon sources. These species possess the ability to oxidize different substituents of butachlor and have important potential use for the bioremediation of wastewater, sediments, and soils.

scholarly journals Analysis of microbial community functional diversity using sole-carbon-source utilisation profiles – a critique

2002 ◽  
Vol 42 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Juliet Preston-Mafham ◽  
Lynne Boddy ◽  
Peter F. Randerson
Keyword(s):  
Microbial Community ◽  
Carbon Source ◽  
Functional Diversity ◽  
Sole Carbon Source ◽  
Carbon Source Utilisation

scholarly journals Batch and Fed-Batch Production of β-carotene by Rhodotorula Toruloides KP324973 Using Corn Steep Liquor As Sole Carbon Source

2021 ◽  
Author(s):  
Alireza Habibi ◽  
Samira Fallahi ◽  
Saeed Abbasi ◽  
Rouhallah Sharifi
Keyword(s):  
Carbon Source ◽  
Sole Carbon Source ◽  
Bubble Column ◽  
Corn Steep Liquor ◽  
Batch Cultivation ◽  
Bubble Column Reactor ◽  
Fed Batch ◽  
Haldane Model ◽  
Optimal Setting ◽  
Steep Liquor

Abstract Application of agro-industrial waste in microbial fermentation is interesting in economic and environmental aspects. Carotenoids production by Rhodotorula toruloides KP324973 was investigated using corn steep liquor (CSL) as sole carbon source. Haldane model with constants µmax = 0.056 h-1, KS = 1.54 vv-1%, and KI = 58.58 vv-1% showed best describe of cell growth kinetics on CLS. A same maximum carotenoid production rate (Rp) about 2.23 μg gcell-1 h-1 was obtained at initial CSL concentration of 5 v/v% after 72 h and 21 h in batch cultivation in shaken flasks and bubble column reactor (BCR), respectively. Further improvement of carotenogenesis was followed by fed-batch cultivation in BCR where the optimal setting of factors at feed flow rate of 5 mL h-1, pH of 5.66, and temperature 14 ˚C gained a highest Rp = 8.686 μg gcell-1 h-1. Chromatographic analysis showed more than 94% of produced carotenes was β-carotene.

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