From the Sector

• Carbios’ biorecycling and biodegradation technologies internationally recognized by consumers as promising answers to their top environmental concerns
• Carbios’ innovations considered one of the best for solving recycling effectively and achieving a real plastic circularity
• Consumer research including qualitative and quantitative fields was conducted between March and August 2022. The research institute, Strategic Research, conducted 6000 interviews in Europe and USA

Carbios’ biorecycling and biodegradation technologies acclaimed by consumers
During the first research field study, respondents were exposed to Carbios’ biorecycling process; a new enzyme-based biotechnology that enables biological recycling of all types of PET plastic waste (including bottles, packaging and textiles), and pushes the boundaries of recycling in terms of the number of cycles.

The research results demonstrated that European and US respondents find Carbios’ biorecycling technology more unique and innovative than traditional PET recycling (i.e. thermo-mechanical recycling), as well as more relevant in its ability to address their concerns and challenges regarding recycling.

In the second research study, conducted in the US, respondents were also exposed to Carbios’ biodegradation technology: an innovative enzymatic solution by which an enzyme is incorporated into plastics during the production process of bio-sourced PLA plastics (corn, sugar cane). This approach makes the material made from plants 100% compostable at ambient temperatures and degradable like plants with the built-in enzyme biologically breaking the bioplastic down in less than eight weeks without microplastics or toxic residues; creating a fully organic circularity.

Similarly to Carbios’ biorecycling technology, Carbios’ PLA biodegradation innovation caught US respondents’ attention with 64% overall liking it. Additionally, 93% of the respondents sampled described the concept as innovative, unique, easy to understand (49%), and believable (43%). Up to 82% of the most environmentally engaged respondents declared they would definitely buy more products made with Carbios’ fully circular biodegradable bioplastic.

Consumers: No other choice but to make plastic fully circular
The research says 99% of the respondents consider it important to protect the environment, while plastic pollution is now ranked the third most-concerning environmental issues after climate change and ocean pollution.

This awareness brings most of these consumers to be environmentally active when it comes to purchasing goods and sorting. For the US respondents, eco-friendly packaging comes in the fourth place in terms of purchase drivers for packaged goods and 65% of them declare sorting plastic from general waste on a regular basis, which makes plastic the most sorted type of waste.

Nevertheless, for a vast majority of the respondents across geographies, even if they would like to reduce their plastic consumption most of the time there is no suitable alternative that is as convenient, light, and cost-efficient as plastics. Hence in an ideal world, consumers would like all plastic waste in landfills and oceans to be collected, cleaned, reused and recycled.

CO₂ as renewable carbon source
Carbon is the main element in numerous materials used in industrial processes and in our daily lives. It is currently mostly provided from fossil sources. But what if carbon could be used directly from CO₂ emissions? Biotechnology shows particularly great potential for the eco-effective conversion of climate-damaging CO₂ emissions into valuable basic chemicals. A consortium of 12 partners investigated this pathway in the EU-funded BioRECO₂VER project, examining the conversion of CO₂ emissions from refineries and the cement industry into the chemical building blocks isobutene (C₄H₈) and lactate (C₂H₆O₃).

Innovative chemo-enzymatic concept for CO₂ Capture
Project partner Luleå University of Technology (LTU) focused on the first process step of capturing and concentrating CO₂ from industrial point sources. Their team developed a hybrid chemo-enzymatic process consisting of a novel solvent blend and an ultrastable carbonic anhydrase (CA) enzyme. The solvent blend included an amino acid ionic liquid and a tertiary amine and displayed a good compromise between enzyme compatibility, absorption rate, capacity and desorption potential. In addition, LTU generated ultrastable enzyme mutants that showed 50% increased resistance to selected flue gas inhibitors compared to the original CA. This 3-component CO₂ capture process was scaled up in a pilot rig, and the set-up further used for real off gas pre-treatment in the project.

Two unique pilots for biotechnological CO₂ Conversion/Utilization
The biotechnological conversion of (captured) CO₂ and the co-substrate hydrogen by microorganisms poses technical and economic challenges because it takes place in the liquid phase and the substrates are gases which are poorly soluble. The BioRECO₂VER project investigated two approaches to address this: fermentation under elevated pressure and bio-electrochemistry with in situ production of hydrogen.

Pressurized fermenter
Project coordinator VITO designed a flexible and multifunctional high-pressure fermenter, customized for research activities with advanced online sensors, monitoring and control, and also including a membrane filtration unit to achieve high concentrations of the microbial biocatalysts. The set-up was broadly tested in the BioRECO₂VER project both with pure CO₂ and CO₂-rich off-gases but can also be used for investigations involving other poorly soluble gases, such as methane, oxygen, or synthesis gas. Pressures up to 10 bar can be applied.

First solely CO₂-based bio-electrochemical platform
University of Girona designed and tested a bio-electrochemical platform. The key differentiators of the pilot plant are:

• Two parallel lines to test engineered strains and bio-electrochemical systems
• Fully automated pilot plant capable to control key operational parameters (pCO₂, pO₂, pH₂, pH, Temperature) to intensify the process performance
• Solid-liquid separation unit (membrane) to recover the planktonic cells and return them into the bio-electrochemical systems.

This unique infrastructure will be used beyond the project to support further research and development activities in the broad area of CO₂ capture and conversion.