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Production of rhamnolipids by integrated foam adsorption in a bioreactor system

Overview of attention for article published in AMB Express, July 2018
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2 tweeters

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56 Mendeley
Title
Production of rhamnolipids by integrated foam adsorption in a bioreactor system
Published in
AMB Express, July 2018
DOI 10.1186/s13568-018-0651-y
Pubmed ID
Authors

Iva Anic, Ines Apolonia, Pedro Franco, Rolf Wichmann

Abstract

Biosurfactants offer environmental as well as health benefits over traditionally used chemical surfactants and heterologous production from engineered microorganisms has been demonstrated, offering containable as well as scalable production of these alternative chemicals. Low product titers and cost intensive downstream processing are the main hurdles for economical biosurfactant production at industrial scales. Increased biosurfactant concentrations are found in the liquid fraction of the foam formed during fermentation of producing microbes. Adsorption of biosurfactants from foam fractions in cultivations may offer a simple concentration and purification method which could enable their cost-effective production. Here, foam adsorption was applied as an in situ method for separation of the rhamnolipid biosurfactants during fermentation of Pseudomonas putida EM383. An integrated process was designed to capture the produced rhamnolipids on hydrophobic adsorbent in packed bed units while minimizing the impact of adsorption on the productivity of the system by recirculating cell-containing collapsed foam flow-through back into the reactor vessel. A stable rhamnolipid production by P. putida EM383 on glucose was performed coupled to this adsorption strategy for 82 h, after which no remaining rhamnolipids were found in the cultivation broth and 15.5 g of rhamnolipids could be eluted from the adsorbent. Rhamnolipid yield from glucose feed was 0.05 g g-1, when up to 2 g L-1 glucose pulse feeding was applied. After solvent evaporation, a product purity of 96% was obtained. The results indicate that the integrated adsorption method can be efficient for simultaneous production and recovery of rhamnolipid biosurfactants from microbial fermentations.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 56 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 56 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 13 23%
Researcher 9 16%
Student > Bachelor 7 13%
Student > Ph. D. Student 4 7%
Student > Doctoral Student 3 5%
Other 7 13%
Unknown 13 23%
Readers by discipline Count As %
Agricultural and Biological Sciences 11 20%
Biochemistry, Genetics and Molecular Biology 9 16%
Chemical Engineering 8 14%
Engineering 4 7%
Environmental Science 2 4%
Other 4 7%
Unknown 18 32%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 26 July 2018.
All research outputs
#10,577,723
of 13,285,014 outputs
Outputs from AMB Express
#657
of 845 outputs
Outputs of similar age
#200,460
of 268,304 outputs
Outputs of similar age from AMB Express
#14
of 16 outputs
Altmetric has tracked 13,285,014 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 845 research outputs from this source. They receive a mean Attention Score of 2.2. This one is in the 16th percentile – i.e., 16% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 268,304 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 13th percentile – i.e., 13% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 16 others from the same source and published within six weeks on either side of this one. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.