The main objective of the SOLRESS project is to propose an integrated biorefinery system to replace the chemical origin of some of the most widely used solvents in the industry, such as ethyl acetate, ethyl lactate and butyl acetate with a bio-based origin from second generation sugars from post-consumer coffee grounds and lignocellulosic feedstocks. The aim is to reinforce the integration of bio-based research and innovation throughout industrial bio-based systems. Moreover, in the valorisation process of these feedstocks, not only the cellulose fraction will be valorised, but also the hemicellulose fraction to obtain 2 of the most notorious green solvents of today, 2-MeTHF and GVL, from an additional line dedicated to the processing of furfural. The challenges will lie in improving downstream purification (DSP) processes and the techniques employed to achieve a technology that is efficient and cost-competitive with current chemical production systems for solvents. At the end of the project, all solvents will be validated in at least 3 of the most relevant applications (productive processes, formulations and recycling technologies) & at least 3 of the sectors with the greatest use of solvents (paints & coatings, cosmetics & materials processing) with the aim of evaluating its performance in comparison with its fossil-based counterparts, but also as a replacement for other dangerous and toxic solvents, such as NMP, CCL4, THF or toluene. Thus, the ambition of the SOLRESS project is triple: To replace the use of fossil, non-renewable raw materials with specific bio-based feedstocks in the production of some of the most widely used solvents. Offer SSbD alternatives to controversial solvents in terms of danger & toxicity (including the ones under the SVHC & SoCs categories). To improve the competitiveness of these processes by incorporating new methods & technologies that increase efficiency & sustainability, demonstrating their scalability & industrial applicability.

LUCRA will exploit the EU’s underutilized and abundant, Municipal Solid Waste and Wood waste as feedstocks for the large scale production of platform building block biobased chemicals at high yield with significant industrial end-user interest using a circular bioeconomy biorefinery approach. It will provide optimized and scaleable ‘breakthrough first of a kind’ innovative technology to create a step change from pilot to large scale integrated fermentation with novel electrochemical extraction of succinic acid (SA) at TRL7 that will facilitate its industrial implementation, business models and market feasibility. This will be achieved by the circular utilization of the mentioned renewable resources as feedstocks which will reduce to a large extent the dependence on fossil resources and achieves at the same time a sustainable SA production route. To fit the needs of the industrial level, LUCRA will optimize the hydrolysis process of the different feedstocks to obtain efficient cellulose and hemicellulose conversion. Enzymatic cocktails will be demonstrated aiming to maximize hydrolysis of fermentable carbohydrate content with low inhibitors production. The crude sugar-rich hydrolysates will be used as fermentation feedstock in an electrochemical membrane bioreactor for efficient extraction and production of SA. In situ extraction of SA will be achieved through an anion exchange membrane resulting in simultaneous acidification, concentration, lower NaOH consumption for pH regulation and less unit operations for SA purification. To demonstrated the produced SA that will be able to compete directly their fossil-based counterparts from petrochemical processes, different polyurethane dispersions and resins will be produced at semi-industrial scale. The process implemented in LUCRA targeting to reduce the cost of bio-SA and will demonstrate an 50% GHG reduction against conventional SA.