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In a zero-waste framework organic wastes are considered a valuable resource. In such a system, the residues from biorefinery processes following organic waste exploitation have to be valorised as organic fertilizer within an eco-friendly approach. Up to now, the design and operation of processes are mainly focused on the first objective but a new perspective is rising: how to integrate and to adapt the organic residues treatment processes into a sustainable agro-system management. The core idea of the present proposal is to fit the best process conditions to maximize both targets. Indeed, Julie JIMENEZ’s research topic at INRA-LBE is focussed on the rationalization of the treatment plant configuration through reverse engineering in order to optimize the overall process design according the targeted services (eg. anaerobic digestion for energy production (biogas) together with organic fertilizer production (digestate)). In this light, the first step is the characterization of the organic fertilizers targeted according to both soil and crop demands in terms of organic matter and nutrients (eg. nitrogen and phosphorus). In this context, this project aims to apply practical physico-chemical indicators to describe available nutrients from organic residues for both waste treatment process modelling and plant nutrient uptake after land spreading. These indicators come from both laboratories (e.g. INRA-LBE and DipSA characterization strategy to describe nutrients plant availability). The application of both approaches, applied on different typology of digestates and investigating the relationships with biological indicators (from both biological process and plant pot trials), is the strategy proposed to solve this issue.
Julie Jimenez is a process engineer who worked in the water treatment research center of VEOLIA during 6 years. In parallel, she had her PhD in 2012 on organic matter characterization for anaerobic digestion modelling. During her career, she got expertise in process engineering, process modelling and organic matter characterization in waste and wastewater treatment fields. She was recruited as a permanent researcher at INRA in 2015. She is in charge the following research topic “Integration and adaptation of organic residues treatment process for a sustainable agrosystems management”. This research topic is focused on the rationalization of the waste treatment plant configuration through reverse engineering in order to optimize all the process design according to the targeted services (eg. energy production by anaerobic digestion and organic fertilizer production). Her research aims (i) to define quality of organic fertilizers according both soils and plants demands, (ii) to study the process treatment impact on the organic fertilizer quality and to model the involved processes in order to optimize the whole treatment chain (iii) based on the two previous issues, to optimize and design the whole treatment chain by considering compromise between all the targeted services and the environmental constraints.
Jimenez, J., Lei, H., Steyer, J.-P., Houot, S., Patureau, S., 2017. Methane production and fertilizing value of organic waste: Organic matter characterization for a better prediction of valorization pathways. Bioresource Technology, 241, 1012-1021.
Aemig Q., Chéron C., Delgenès N., Jimenez J., Houot S., Steyer JP., Patureau P., 2016. Distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in sludge organic matter pools as a driving force of their fate during anaerobic digestion. Waste Management, 48, 389-396.
Jimenez, J., Aemig, Q., Doussiet, N., Steyer, J.-P., Houot, S., Patureau, D., 2015. A new organic matter fractionation methodology for organic wastes: Bioaccessibility and complexity characterization for treatment optimization. Bioresource technology, 194, 344-353.
Jimenez, J., Latrille, E., Harmand, J., Robles Martinez, A., Ferrer, J., Gaida, D., Wolf, C., Mairet, F., Bernard, O., Alcaraz-Gonzalez, V., Mendez-Acosta, H., Zitomer, D., Totzke, D., Spanjers, H., Jacobi, F., Guwy, A., Dinsdale, R., Premier, G., Mazhegrane, S., Ruiz-Filippi, G., Seco, A., Ribeiro, T., Pauss, A., Steyer, J.-P., 2015. Instrumentation and control of anaerobic digestion processes: a review and some research challenges. Reviews in Environmental Science and Bio-Technology, 14 (4), 615-648.
Jimenez, J., Gonidec, E., Cacho Rivero, J. A., Latrille, E., Vedrenne, F., Steyer, J.-P., 2014. Prediction of anaerobic biodegradability and bioaccessibility of municipal sludge by coupling sequential extractions with fluorescence spectroscopy: towards ADM1 variables characterization. Water Research, 50, 359-372.