scholarly journals Stable acetate production in extreme-thermophilic (70°C) mixed culture fermentation by selective enrichment of hydrogenotrophic methanogens

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Fang Zhang ◽  
Yan Zhang ◽  
Jing Ding ◽  
Kun Dai ◽  
Mark C. M. van Loosdrecht ◽  
...  
Keyword(s):  
Mixed Culture ◽  
Acetate Production ◽  
Mixed Culture Fermentation ◽  
Selective Enrichment ◽  
Hydrogenotrophic Methanogens

scholarly journals Improving Ethyl Acetate Production in Baijiu Manufacture by Wickerhamomyces anomalus and Saccharomyces cerevisiae Mixed Culture Fermentations

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Guangsen Fan ◽  
Chao Teng ◽  
Dai Xu ◽  
Zhilei Fu ◽  
Pengxiao Liu ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Ethyl Acetate ◽  
Mixed Culture ◽  
Nutrient Competition ◽  
Acetate Production ◽  
Mixed Fermentation ◽  
Wickerhamomyces Anomalus ◽  
Flavor Perception ◽  
Positive Effect

Ethyl acetate content has strong influence on the style and quality of Baijiu. Therefore, this study investigated the effect of Saccharomyces cerevisiae Y3401 on the production of ethyl acetate by Wickerhamomyces anomalus Y3604. Analysis of cell growth showed that Y3401 influences Y3604 by nutrient competition and inhibition by metabolites, while the effect of Y3604 on Y3401 was mainly competition for nutrients. Mixed fermentation with two yeasts was found to produce more ethyl acetate than a single fermentation. The highest yield of ethyl acetate was 2.99 g/L when the inoculation ratio of Y3401:Y3604 was 1:2. Synergistic fermentation of both yeasts improved ethyl acetate production and increased the content of other flavor compounds in liquid and simulated solid-state fermentation for Baijiu. Saccharomyces cerevisiae had a positive effect on ethyl acetate production in mixed culture and provides opportunities to alter the aroma and flavor perception of Baijiu.

Metabolic Products of Mixed Culture Fermentation

2020 ◽  
pp. 75-92
Author(s):  
Siddhartha Pandey ◽  
Nitin Kumar Singh ◽  
Tara Chand Yadav ◽  
Ankur Kumar Bansal ◽  
Arti Thanki ◽  
...  
Keyword(s):  
Mixed Culture ◽  
Mixed Culture Fermentation ◽  
Metabolic Products

scholarly journals Enhanced Anaerobic Mixed Culture Fermentation with Anion-Exchange Resin for Caproate Production

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 404 ◽  
Author(s):  
Jiangnan Yu ◽  
Jialin Liao ◽  
Zhenxing Huang ◽  
Peng Wu ◽  
Mingxing Zhao ◽  
...  
Keyword(s):  
Mixed Culture ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Feedback Inhibition ◽  
Control Group ◽  
Low Grade ◽  
Mixed Culture Fermentation ◽  
Strong Base ◽  
Desorption Efficiency

The bioproduction of caproate from organic waste by anaerobic mixed culture is a very attractive technology for upgrading low-grade biomass to a high-value resource. However, the caproate production process is markedly restricted by the feedback inhibition of caproate. In this study, four types of anion-exchange resin were investigated for their enhancing capability in caproate fermentation of anaerobic mixed culture. The strong base anion-exchange resin D201 showed the highest adsorption capacity (62 mg/g), selectivity (7.50), and desorption efficiency (88.2%) for caproate among the test resins. Subsequently, the optimal desorption temperature and NaOH concentration of eluent for D201 were determined. The adsorption and desorption efficiency of D201 remained stable during eight rounds of the adsorption–desorption cycle, indicating a satisfactory reusability of D201. Finally, performances of caproate fermentation with and without resin adsorption for carboxylate were evaluated. The results demonstrated that the final concentration of caproate was improved from 12.43 ± 0.29 g/L (without adsorption) to 17.30 ± 0.13 g/L (with adsorption) and the maximum caproate production rate was improved from 0.60 ± 0.01 g/L/d to 2.03 ± 0.02 g/L/d. In the group with adsorption, the cumulative caproate production was increased to 29.10 ± 0.33 g/L broth, which was 134% higher than that of the control group. Therefore, this study provides effective approaches to enhance caproate production.

Mixed-culture fermentation for enhanced C21-hydroxylation of glucocorticoids

2020 ◽  
Vol 314-315 ◽  
pp. 14-24
Author(s):  
Lisa König ◽  
Sabine Szczesny ◽  
Simone Brixius-Anderko ◽  
Rita Bernhardt ◽  
Frank Hannemann
Keyword(s):  
Mixed Culture ◽  
Mixed Culture Fermentation

scholarly journals Metabolic modeling for predicting VFA production from protein‐rich substrates by mixed‐culture fermentation

2019 ◽  
Vol 117 (1) ◽  
pp. 73-84 ◽  
Author(s):  
Alberte Regueira ◽  
Juan M. Lema ◽  
Marta Carballa ◽  
Miguel Mauricio‐Iglesias
Keyword(s):  
Mixed Culture ◽  
Metabolic Modeling ◽  
Mixed Culture Fermentation ◽  
Protein Rich
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