Topic "Nutrient recovery processes (N and P)"
A few words
Nutrient recovery processes for Nitrogen and Phosphorus
La récupération des nutriments des eaux usées est un enjeu majeur pour améliorer la durabilité de nos systèmes de gestion des eaux usées et pour produire des fertilisants, pour des produits alimentaires biosourcés. Ceci est d’autant plus nécessaire que la production traditionnelle d’engrais azotés est coûteuse en énergie, et que le phosphore est une ressource minière non renouvelable.
The SYMBIOSE team develops innovative processes to transform mineral forms into a valuable form and extract them at acceptable costs. Our ambition is to obtain processes with low energy requirements and reduced environmental impacts.
We work with sludge from biological treatment plants, digestates from anaerobic digestion, or specific effluents such as urine.
The transformation of wastewater treatment plants into resource recovery plants is studied both for metropolises (Paris and the MOCOPEE program) and for small and medium-sized wastewater treatment plants in rural areas (collaboration with Réseau31). Our approach aims to equip current small wastewater treatment plants with specific automatic control solutions to reduce costs, and to consider centralized recovery solutions.
Ongoing projects
OMIX Project
2017-2021
Fractionation of digestates into irrigation water and renewable fertilizers for a sustainable methanization.
The project is a winner of the GRAINE call for projects from ADEME and is co-financed by the Occitanie Region. The challenge of the project is to propose the experimental development and the demonstration of a total transformation of digestates, coming from a methanization site treating mainly biowaste, to obtain on the one hand various fertilizers (organic, organo-mineral, mineral) ensuring the return of nutrients to the soils, and on the other hand water for irrigation or reuse, at a territorial scale. The technical demonstration of the OMIX system will be carried out by the company CLER-VERTS, the company NEREUS and the laboratory TBI. The work carried out within the team is focused on transmembrane chemosorption (TMCS). This innovative and promising technology can be applied to digestate supernatants and urine from source separation (DESIGN project) where this technology is combined with phosphorus recovery by struvite precipitation.)
MOCOPEE Project
2017-2021
This project is financed by the SIAAP via the MOCOPEE research and innovation program. The aim is to develop phosphorus recovery processes in wastewater treatment plants in which iron salts are used.
The work includes (1) an analysis of the speciation of phosphorus and iron in sludge (2) an analysis of the kinetics of biological reduction of iron under anaerobic conditions, (3) a study of iron phosphate (vivianite) recovery processes.
Lauréat de l’appel à projets Interreg Sudoe, le projet ressemble des acteurs internationaux espagnols, portugais et français avec le principal défi d’entreprendre la conversion de petites et moyennes stations d’épuration des eaux usées (STEP) en zones rurales en installations destinées à la récupération des ressources. L’axe du projet développé dans l’équipe consiste à construire des algorithmes de contrôle automatique pour l’optimisation de l’élimination du phosphore et la consommation d’énergie dans des stations d’épuration de petite et moyenne taille.
The DESIGN project is funded by the French National Research Agency (ANR) on the main societal challenge: Mobility and sustainable urban systems. It aims to develop and evaluate innovative scenarios for source separation and wastewater recovery. The challenge of the project is to evaluate the real benefits and constraints of these alternative approaches by integrating different criteria:
- on the environmental level, by evaluating the different solutions through life cycle analysis;
- d’un point de vue technologique et économique : en développant des technologies clés pour les nouvelles filières, i.e. des toilettes à séparation sous vide qui n’existent pas actuellement, une nouvelle technologie de récupération de l’azote ammoniacal pour produire un fertilisant ;
- from a sociological point of view, by measuring the capacity of appropriation of these new devices of management of human discharges and decentralized systems by the communities, the users and the professionals of the urban environment;
- finally, from an urban planning point of view, by assessing the suitability of source separation scenarios for different urban typologies.
The DESIGN project brings together two research laboratories, two design offices specialized in the environment, and two companies developing innovative equipment.