12th Workshop
Recent advances in design and modelling of PPB photobioreactors
6 – 7th July 2026
Narbonne – France
KEY DATES
- Due date for Abstract Submission: 15th May 2026
- Final date to apply for funding: 15th May 2026
- Communication, confirmation and funding (if applicable in the form of reimbursement): 1st June 2026.
- Early bird registration: 15th June 2026
Presentation
This is a call for participating at the 12th Workshop in the frame of WG3 of the COST action (CA21146) – PURPLEGAIN.
12th Workshop (WG2), 6-7 July 2026, Narbonne– France
Title: “Recent advances in design and modelling of PPB photobioreactors”
Organizing committee: Dr. Gabriel Capson Tojo (Working Group 2 co-Leader), Dr. Luis Diaz Allegue (Working Group 2 co-Leader), Dr. Raul Muñoz Torre (Grant Awarding Coordinator), Dr. Joana Fradinho (Vice Chair), Dr. Ioanna Vasiliadou (Training Schools Coordinator), Dr. Daniel Puyol (Chair).
Key dates
- Due date for Abstract Submission: 15th May 2026
- Final date to apply for funding: 15th May 2026
- Communication, confirmation and funding (if applicable in the form of reimbursement): 1st June 2026.
- Early bird registration: 15th June 2026
COST Action
COST Action CA21146
COST Action CA21146 is a four-year networking action that aims at creating a European network to share information, facilitating technology and knowledge transfer between the academic and industrial sectors, related to Purple Photosynthetic Bacteria (PPB) applications for resource recovery from organic waste sources. Resource recovery includes wastewater or organic waste, open or closed environments, in single or chain processes.
The network associates fundamental-focused and applied research groups, improving lab-scale technology optimization through mechanistic modelling. It benefits the technology transfer from applied-research groups to industry, considerably improving process design. PURPLEGAIN also aims to create a database for techno- economic, social and environmental impacts studies, which facilitates the marketability of both the PPB-based technologies and the products to extract. Some focused products are polyhydroxyalkanoates, single-cell proteins, biomass for energy, biohydrogen, biomass as fertilizer, carotenoids, terpenoids, organic acids, coenzyme Q10, and 5-aminolevulinic acid.
COST
COST is an intergovernmental framework for European Cooperation in Science and Technology established to initiate networking and coordination of nationally funded research activities on a European level. It facilitates bringing good scientists together under light strategic guidance based on networks, called COST Actions, centred around research projects in fields that are of interest to COST countries and cooperating countries.
12th Workshop – Recent advances in design and modelling of PPB photobioreactors
Call for participating
This is a call for participating in the 12th Workshop
We invite participations as well as abstract contributions (for Oral and Pitches presentations) to this interdisciplinary workshop from:
- PhD students & post-doctoral researchers working on PPB-related technologies.
- Professors & academic researchers exploring PPB applications.
- Start-ups & entrepreneurs developing PPB-based products and processes.
- Technology developers & innovators working on PPB solutions for resource recovery.
We are looking for a broad range of PPB-based innovations, including but not limited to:
- Design and operation of photobioreactors for resource recovery and/or food and nutraceutical production
- State-of-the-art results from upscaled reactors in PPB
- Novel reactor configurations and illumination strategies (light distribution, LED optimization, spectral tailoring, light-dark cycling, optimization of gas-liquid mass transfer, biomass retention)
- Modelling approaches for PPB systems, including mechanistic, hybrid, and data-driven models, dynamic modelling, and parameter estimation and identification
- Model-based scenario simulation and multi-objective optimization
- Process control, monitoring, and automation for stable and efficient PPB operation
If you have a breakthrough concept, a lab-scale prototype, or a commercial pilot, we want to hear from you!
Abstracts should be maximum 350 words (see Abstract Template) outlining your work, technology, or business case, including:
- Technology/solution description (process, application, or product focus).
- Key technical, regulatory, or investment challenges.
- Potential market impact and sustainability benefits.
Contributors and attendees may apply for financial support (see financial support section).
Program Day
July 6th
| Time | Title | Speaker |
|---|---|---|
| Session I: WG2 biannual meeting | ||
| 9:00–9:30 | Presentation of events and deliverables | Gabriel Capson Tojo, Luis Diaz Allegue |
| 9:30–11:00 | Round table | Moderators: Gabriel Capson Tojo, Luis Diaz Allegue |
| 11:00–11:30 | Coffee Break | |
| Session II: Seminar – Introduction to PPB mechanistic modelling and control | ||
| 11:30–12:30 | Linking metabolism and modelling in PPB systems | Daniel Puyol |
| 12:30–13:30 | Lunch Break | |
| 13:30–14:30 | TBD | Ioanna Vasiliadou |
| 14:30–15:30 | Lessons learnt from 20 years of instrumentation, modelling and control of anaerobic systems | Jean-Philippe Steyer |
| 15:30–16:00 | Coffee Break | |
| 16:00–17:00 | Specificities of modelling PPB systems | Gabriel Capson-Tojo |
| 17:00–18:00 | Practicum: definition and implementation of a simple mechanistic model for autotrophic PPB growth | Gabriel Capson-Tojo |
| Evening | Dinner: La Cambuse du Saunier, Gruissan (Website) – 30-40€ per person Having dinner in front of a purple lake seems appropriate! | |
July 7th
| Time | Title | Speaker |
|---|---|---|
| 8:30–9:00 | Registration | |
| 8:45–9:00 | Opening Remarks | Gabriel Capson Tojo, Luis Diaz Allegue and Daniel Puyol |
| Session III | ||
| 9:00–10:00 | Keynote: Modelling light transfer in phototrophic systems | Andrea Turolla |
| 10:00–11:00 | Presentations from selected speakers (each 20 min: 15 min talk, 5 min Q&A) | |
| 11:00–11:20 | Coffee Break | |
| 11:20–12:20 | Presentations from selected speakers (each 20 min: 15 min talk, 5 min Q&A) | |
| 12:20–12:30 | Concluding remarks | Gabriel Capson Tojo, Luis Diaz Allegue and Daniel Puyol |
| 12:30–13:30 | Lunch Break | |
| Session IV | ||
| 13:30–14:00 | Keynote: Novel reactors for effective light and gas transfer | Raquel Lebrero |
| 14:00–15:00 | Presentations from selected speakers (each 20 min: 15 min talk, 5 min Q&A) | |
| 15:00–15:30 | Coffee Break | |
| 15:30–16:30 | Presentations from selected speakers (each 20 min: 15 min talk, 5 min Q&A) | |
| 16:30–18:00 | Round table discussion: What are the most pressing needs in reactor design and how can models help? | Moderators: Gabriel Capson Tojo, Luis Diaz Allegue and Daniel Puyol |
Venue
Laboratory of Environmental Biotechnology INRAE-LBE
Address: 102 Avenue des Étangs, 11100 Narbonne, France
Location code: 5X4V+MX Narbonne
Accommodation and Transportation information
Accommodation information
Transportation information
INRAE-LBE can be access by car: 10-minute ride from the center of Narbonne. Parking available on site.
It can also be easily reached from the center of Narbonne by public transport (bus):
- Line C: 18-minute ride; bus stop (Quatourze) right in front of the venue
- Line E: 12-minute ride; bus stop (Cinémas) 15 minutes walking from the venue
More information on bus schedule: https://www.citibus.fr/se-deplacer/lignes/ligne-bus-c
Getting to Narbonne
There is no airport in the city, but Narbonne can be easily reached by train from Carcassone (30min), Toulouse (1h10min), Montpellier (1h2min), or Barcelona (2h9min). Carcassone airport is the closest one, but there are not many flight options. Toulouse and Barcelona are well connected airports.
Financial Support – Application procedure for reimbursement
Documentation for applying
The documentation needed for applying for reimbursement are as follows:
- Applicants must upload a short Curriculum Vitae (in English).
- Applicants must upload a motivation letter (in English).
- Applicants must upload a scanned copy of their passport (if applicants do not have a passport, they can upload their national ID card)
Please, check the General Rules to be reimbursed.
Selection criteria
The selection criteria for participants that will be eligible for reimbursement will comply with the COST Excellence and Inclusiveness Policy, in the implementation of the Action and will encourage attendance by a diverse selection of participants in consideration of:
1. Underrepresented groups, including those with disabilities. Priority will be given to underrepresented groups, including those with disabilities.
2. Gender balance.
3. The level of involvement of Inclusiveness Target Countries (ITCs). Priority will be given to participants form Inclusiveness Target Countries. The current list of ITCs include: Albania, Armenia, Bosnia and Herzegovina, Bulgaria, Cyprus, Czech Republic, Estonia, Croatia, Georgia, Greece, Hungary, Lithuania, Latvia, Malta, Moldova, Montenegro, Poland, Portugal, Romania, Slovenia, Slovakia, Republic of North Macedonia, Republic of Serbia, Turkey and Ukraine.
4. The level of involvement of Early Career Investigators (ECIs). Priority will be given to PhD students and young post-doctoral researchers, followed by senior post-doctoral researchers and professors.
5. In addition, workshop organizers may also consider other special attributes such as:
i) type, or level of expertise in the field of the Workshop based on the curriculum vitae,
ii) appropriate core knowledge and understanding
iii) willingness to participate based on the motivation letter,
iv) demonstrated interest based on the motivation letter,
v) the positive impact that the participation will have on applicant’s future carrier and
vi) willingness to make a presentation in the Workshop session.
Financial contribution
Financial support through reimbursement does not necessarily cover all expenses. A fixed daily allowance of EUR 200 is available for participants. In addition, for travel:
- Up to a maximum of EUR 600 in total can be afforded to each successful applicant from ITC country.
- Up to a maximum of EUR 450 in total can be afforded to each successful applicant from non-ITC country.
- Up to a maximum of EUR 200 in total can be afforded to each successful applicant from France (for travel over a distance of 100 km).
Note that locals (from Narbonne) cannot claim travel reimbursement. This financial contribution must be understood as financial aid aimed to help applicants to cover the expenses of their participation in the Workshop. This financial aid does not aim to cover 100% of the expenses. When claiming costs in e-COST, please consider that claims higher than the values provided above will be asked for modifications, so please make your claim as accurate as possible to avoid unnecessary delays in the payment.
Evaluation process and result announcement
Evaluation process
The selection committee, composed of the Action Chair, the Vice Chair, the Grant Awarding coordinator, the Training Schools Coordinator and the WG3 Leaders, and the local organizers will evaluate the applications within a short time period (after the abstract submission deadline) and will inform all the applicants for their evaluation results. The successful applicants will then receive an e-mail from the grant holder (Grant Letter Notification), stating the official approval of the reimbursement, the granted budget and a payment request form which has to be completed after the completion of the Workshop.
Criteria of reimbursement
If the amount of reimbursement by all applications within a call does not exceed the available budget, the applications are handled by the selection committee. If there are more applications than funding is available, the following procedure takes place.
- A list of all applications (containing an informative summary) is distributed to all members of the selection committee in form of a table in which every evaluator can mark which applications he or she can evaluate according to their field of expertise.
- To guarantee a fair and objective evaluation, an evaluator should have no affiliation with neither the home nor the host institution of the application in question.
- All applications are evaluated by two members of the selection committee. The Grant Awarding coordinator distributes the proposals to the individual evaluators.
- The criteria given in the table below shall be applied for evaluation. The first criterion (a) is assessed by the Grant Awarding coordinator prior to the evaluation process.
| Criterion | max. points |
| a) Before any further criteria are considered | |
| Application is complete and fulfils all formal requirements | pass/no pass |
| The application will be ranked last if the applicant was granted in previous call | pass/no pass |
| b) Evaluation of the proposal | |
| Applicant from ITC country | 0 or 20 |
| Applicant is ECI (or promotes gender balance) | 0 or 10 |
| Impact on the career of the applicant | 15 |
| Willingness to participate based on the motivation letter | 10 |
| Willingness to make a presentation in the scope of the Workshop | 20 |
| Participation in PurpleGain Activities | 40 |
| CV of the applicant | 10 |
| Relevance to the objectives of PurpleGain Action | 20 |
Willingness to attend the 2nd day of the workshop | 15 |
- The evaluators report their evaluations to the Grant Awarding coordinator.
- The Grant Awarding coordinator ranks all evaluations and then reports the final result to the selection committee to be discussed and accepted.
- The applicants are informed about the decision reached.
More information
- Website COST Action
- Online application form
- COST Annotated Rules
- PURPLEGAIN Quick Submission Guide
- PURPLEGAIN Best-Practices
For further information, you may contact the:
- Dr. Gabriel Capson Tojo, Working Group 2 co-Leader
- Dr Raul Muñoz Torre – Grant Awarding Coordinator
- Dr Daniel Melchor Puyol Santos – Chair
- Dr. Joana Fradinho – Vice-Chair
- Dr. Ioanna Vasiliadou – Training Schools Coordinator
