Methodology for the ecoconception of an innovative process: a bioelectrosynthesis for organic waste

Méthodologie d'éconconception pour un procédé innovant: la bioélétrosynthèse des déchets organiques

Giard, L. ; Bouchez, T. ; Renvoise, L. ; Aissani, L.

Type de document
Communication scientifique avec actes
Langue
Anglais
Affiliation de l'auteur
IRSTEA RENNES UR OPAALE FRA ; IRSTEA ANTONY UR HBAN FRA ; SUEZ ENVIRONNEMENT CIRSEE LE PECQ FRA ; IRSTEA RENNES UR OPAALE FRA
Année
2014
Résumé / Abstract
ACV de production de bioéthanol par bioélectrosynthèse de déchets organiques.
Bulk chemicals and liquid fuels are currently produced almost exclusively from petrochemical feedstock. In the light of emission reduction targets and the dependence on non renewable resources, the production of the same or functionally equivalent chemicals from renewable resources may play an important role [1, 2]. The project BIORARE (Bioelectrosynthesis for the refinery of residual waste) was set up to contribute to this objective. Its purpose is to use microbial electrosynthesis for the direct production of fuels and chemicals from organic waste and CO2 (see figure 1). Ecoconception is used to help to make choices. This is this work which is study. In a first step, we had to determine which parameters of the Bioelectrosynthesis (BES) could be the most impacting ones to define the priorities to be considered to minimize the potential impacts of the entire process. Some flows could be sensitive: the nature and the quantity of outputs, the nature and the quantity of materials, and the amount of energy used. The inventory of these flows had to be the first step. Thanks to databases and literature four have been identified as sensitive: electrodes, membrane, energy and chemicals produced. After determining this, we have to design the model for coupling anaerobic digestion to the BES. This was realized using Life Cycle Assessment approach. The goal of this assessment is to determine the relative influence of various target parameters on the impacts of the process. For example, results will allow assessing if the choice of a material for the electrode could have a significant influence on total impacts. Our methodology illustrates to what extend Life Cycle Assessment could help for the conception of a process, through the evaluation of the contribution of various parameters to the impacts. After, it is possible to integrate them into a model to determine what impacts they could have on the whole production chemicals or fuels from organic waste system.
Congrès
5th International Conference on Engineering for Waste and Biomass Valorisation , 25/08/2014 - 28/08/2014, Wasteng, Rio de Janeiro, BRA

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