Interest of electrodialysis to reduce potassium level in vinasses. Preliminary experiments

Decloux, Martine; Bories, A.; Lewandowski, Richard; Fargues, Claire; Mersad, Amel; Lameloise, Marie-Laure; Bonnet, Frédéric; Dherbecourt, Bertrand; Osuna, Leandro Nieto

doi:10.1016/s0011-9164(02)00520-9

Cited by 34 publications

(17 citation statements)

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“…On the other hand, it is of special significance that a salt incrustation during longer operating periods may occur at this temperature just as in vinasse evaporators [21]. Based on the stated analysis, electrodissolution tests were made to establish the performance of the anodic dissolution at 60 • C and 1 mA cm −2 current density.…”

Section: Equivalent Circuitmentioning

confidence: 99%

Impedance spectra of anodic dissolution of iron in distillery vinasse

Marriaga-Cabrales¹,

Martínez²

2014

Electrochimica Acta

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Section: Equivalent Circuitmentioning

confidence: 99%

Impedance spectra of anodic dissolution of iron in distillery vinasse

Marriaga-Cabrales¹,

Martínez²

2014

Electrochimica Acta

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“…For each of these co-products, alternative chains were designed according to local practices and the expertise of professionals from the region. The avoided production of mineral fertilisers was calculated based on the chemical composition of co-products and their mineralization rates, depending on the site and time of spreading (Decloux et al 2002;ITB 2002). The equivalent of pulp was silage maize, given the close dry matter contents (around 25% DM) and low protein values of the two products that leads farmers to use them indifferently in feeding rations (Comité National des Co-Produits/ADEME 2002).…”

Section: Goal and System Boundarymentioning

confidence: 99%

Using a crop model to account for the effects of local factors on the LCA of sugar beet ethanol in Picardy region, France

Bessou

Lehuger

Gabrielle

et al. 2012

Int J Life Cycle Assess

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Background. The results of published Life Cycle Assessments (LCAs) of biofuels are characterized by a large variability, arising from the diversity of both biofuel chains and the methodologies used to estimate inventory data. Here, we suggest that the best option to maximize the accuracy of biofuel LCA is to produce local results taking into account the local soil, climatic and agricultural management factors.Methods. We focused on a case-study involving the production of first-generation ethanol from sugar beet in the Picardy region in Northern France. To account for local factors, we first defined three climatic patterns according to rainfall from a 20-year series of weather data. We subsequently defined two crop rotations with sugar beet as a break crop, corresponding to current practice and an optimized management scenario, respectively. The six combinations of climate types and rotations were run with the process-based model CERES-EGC to estimate crop yields and environmental emissions. We completed the data inventory and compiled the impact assessments using Simapro v.7.1 and Ecoinvent database v2.0.Results. Overall, sugar beet ethanol had lower impacts than gasoline for the abiotic depletion, global warming, ozone layer depletion and photochemical oxidation categories. In particular, it emitted between 28 and 42% less greenhouse gases than gasoline. Conversely, sugar beet ethanol had higher impacts than gasoline for acidification and eutrophication due to losses of reactive nitrogen in the arable field. Thus, LCA results were highly sensitive to changes in local conditions and management factors. As a result, an average impact figures for a given biofuel chain at regional or national scales may only be indicative within a large uncertainty band.Conclusion. Although the crop model made it possible to take local factors into account in the life-cycle inventory, best management practices that achieved high yields while reducing environmental impacts could not be identified. Further modelling developments are necessary to better account for the effects of management practices, in particular regarding the benefits of fertiliser incorporation into the topsoil in terms of nitrogen losses abatement. Supplementary data and modelling developments also are needed to better estimate the emissions of pesticides and heavy metals in the field.3

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“…The pH of concentrate remains quasi-constant during the run. Significant decrease of pH in the diluate side has already been observed in conventional electrodialysis when processing organic solutions containing weak acids: depotassification or demineralization of distillery stillage [13,14], desacidification of fruit juices [15], demineralization of solutions of organic acids [16], of grass silage juice [17], tartaric stabilisation of wines or demineralization of whey. Although this phenomenon is not clearly attributed by any of the mentioned authors, it seems that the existence of dissociation equilibria and the different behaviours of dissociated species in the bulk and inside the membrane are a key for the understanding.…”

Section: Evolution Of Ph In Diluate and Concentrate Compartmentsmentioning

confidence: 99%