D 3.3. Screening solvents

Main objectives

The extraction of 1,3-propanediol from its aqueous solutions mimicking fermentation broths, and then from the actual fermentation broths produced by biocatalytic treatment of glycerol, has been targeted.

 Main outcomes

The capability of different classes of media of extracting 1,3-propanediol out of its water solutions, mimicking the fermentation broths, was tested. Among them, ionic liquids were proven to be the best media for the purpose. A thorough investigation of the capability of a wide range of ionic liquids to extract 1,3-propanediol from its water solution, mimicking the glycerol fermentation broths, and then out of the actual fermentation broths produced and delivered to QUB by STUBA, has been carried out. A range of hydrophobic ionic liquids were synthesised and tested: some of them exhibited promising extraction behaviour. Both high extraction efficiency and stability was achieved. Employing ionic liquids for real fermentation broth extraction, more than 40 % of 1,3-propanediol could be removed after consecutive extractions.


  • Review of technical glycerol potential from biodiesel production and availability for improved cascading in Europe

    May 2, 2017

    The article entitled: “Review of technical glycerol potential from biodiesel production and availability for improved cascading in Europe” has been published and is available online. Authors: André Brosowski (DBFZ), Stephanie Hauschild (DBFZ), Karin Naumann (DBFZ), Jens Hösel (DBFZ), Daniela Thrän (Helmholtz Centre for environmental research), Type of publication: Article – Research Paper Date: April 2017 Publication: […]


  • 42M Progress Meeting – April 26 to 28, 2017 – Leipzig (Germany)

    April 11, 2017

    All the project partners will be hosted by DBFZ in Leipzig (Germany) from April 26 to 28, 2017. This is a good opportuny to discuss about the project advancement after the last Consortium Meeting which took place from October 12 to 14, 2016 in Hurtigruten, Bergen – Trondheim, Norway. Agenda available here: GRAIL_42M_Agenda     […]


  • GRAIL e-NEWSLETTER #5 – February 2017

    February 22, 2017

    PROJECT SUMMARY GRAIL : GLYCEROL BIOREFINERY APPROACH FOR THE PRODUCTION OF HIGH QUALITY PRODUCTS OF INDUSTRIAL VALUE GRAIL is a 48-months collaborative project funded by the European Commission, under the FP7 Programme for Knowledge Based Bio-Economy. The topic of GRAIL project is “Preventing and valorizing bio-waste in biorefineries optimal and cost-effective industrial biocatalysts”. What’s inside […]


  • D2-2 – Operating parameters for batch experiments

    January 5, 2017

    Main Objectives To provide information about operational parameters at batch configurations such as, the effect of inoculum, addition of nutrients, pH control and substrate concentration to improve hydrogen and ethanol production  Main Outcomes According to the results, the selected inoculum was sludge from an aerobic wastewater treatment plant and an aerobic pretreatment. Also, it was […]