Tesis sobre el tema "Valorisation agricoles"
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Castandet, Michel. "Recyclage et valorisation des déchets agricoles industriels et urbains". Rouen, 1994. http://www.theses.fr/1994ROUES041.
Texto completoKouassi, Esaie. "Contribution à la valorisation des sous-produits agricoles en bioproduits". Phd thesis, Toulouse, INPT, 2018. http://oatao.univ-toulouse.fr/20523/1/Kouassi_Esaie.pdf.
Texto completoNouwezem, Mehenou Rufine. "Valorisation de résidus lignocellulosiques : obtention de matériaux thermodurcissables". Toulouse, INPT, 1992. http://www.theses.fr/1992INPT052G.
Texto completoTeixeira, Franco Rùben. "Optimisation des pratiques de gestion des déchets agricoles en lien avec leur valorisation par méthanisation". Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI092/document.
Texto completoLike other European countries, France is currently mobilizing for the energy recovery of its agricultural wastes by anaerobic digestion. Nevertheless, the production of these resources undergoes several fluctuations throughout the year. Consequently, in order to allow the continuous supply of biogas plants, these raw materials must be often stored for long periods (several months). This thesis focuses on the optimization of agricultural wastes management practices before anaerobic digestion. Different storage conditions were studied, notably the open-air storage and ensiling, with the aim of improving the conservation of the biochemical methane potential and optimizing the conversion of organic matter during anaerobic digestion. An original experimental methodology was developed and implemented for the multiphasic characterization of biomass at different stages of its management and storage, including analysis on the different biochemical fractions and bioavailability of carbon for anaerobic digestion. First, this methodology was applied to the preparation and long-term storage of catch crops. This evidenced a major advantage of using ensiling rather than open-air storage for the preservation of biomass and methane potential. Second, long-term storage trials were conducted for cattle manure. These experiments highlighted the poor conservation of manure and the benefits of co-substrates in the improvement of storage performances under ensiling conditions. To explain the major mechanisms that occur during the ensiling process, a modelling approach was used to synthesize and interpret the results. Finally, this research work led to the identification of good conservation practices for the major feedstocks of agricultural biogas plants
Morel, Sophie. "Valorisation de l'histoire et du patrimoine des coopératives agricoles : L'exemple de la Loire". Phd thesis, Université Jean Monnet - Saint-Etienne, 2013. http://tel.archives-ouvertes.fr/tel-00993464.
Texto completoLefranc-Morel, Sophie. "Valorisation de l’histoire et du patrimoine des coopératives agricoles : l’exemple de la Loire". Thesis, Saint-Etienne, 2013. http://www.theses.fr/2013STET2176/document.
Texto completoBorn out of misery, agricultural co-operatives have been walking hand in hand with farrners through economie, political and societal changes since the beginning of the 20th century.. Economie tool designed tofulfill the development of their members and their territories, they never stopped proving their capacities to adapt. However, their political model involving members to the decision-making process had suffered from changes such as diversification, the establishment of subsidiaries, the opening to non-co-operative partners.The place of members has to be reassessed, their loyalty being an undeniable asset for the co-op.This study is based upon the analysis of the minutes of the general assemblies of five agricultural coops.It aims at making history an asset in the management of the members: by building knowledge, history can feed communication towards members. Finally, it is proposed to carry out this research in a co-operative way so as to pool resources
Pateha, Muhammad Kasim. "Contribution à la valorisation des sous-produits industriels et agricoles dans l'industrie du ciment". Lyon, INSA, 1991. http://www.theses.fr/1991ISAL0094.
Texto completoThe aim of this study was the valorization of industrial by products (fly ash) or agricol wastes (rice husk ash) in the cement industry. The principal objective was to determine a durable and economical binder containing the highest amount of by-product. The pozzolanique activity of these blend was studied using physicochemical methods-conductimetry, thermal analysis, x-ray diffraction, I-R spectrometry, scanning electron microscopy, mercury porosimetry and mechanical test. The use of rice husk ash led to the maximum consumption of lime whereas the best strength were obtained with fly ash blended cements. The kinetics of reactivity are different : a good activity at early ages for the rice husk ash and more progressive action of fly ash. Mortars cast with these blended cement were placed in aggressive solutions. The results showed that 30 to 50% fly ash blend can be used when the solution is meanly aggressive. In high chloride solution a 50% rice husk ash blend gave good results
Thiebaud-Roux, Sophie Borredon Marie-Elisabeth. "Valorisation chimique de composés lignocellulosiques obtention de nouveaux matériaux /". Toulouse : INP Toulouse, 2004. http://ethesis.inp-toulouse.fr/archive/00000045.
Texto completoGatt, Etienne. "Etude de la déconstruction de résidus agricoles lignocellulosiques par extrusion biocatalytique". Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0006/document.
Texto completoBiocatalytic extrusion, also named bioextrusion, is a reactive extrusion technique using enzymes as catalysts. Bioextrusion is considered as a link between the previous physico-chemical pretreatment (like alkaline extrusion) and the subsequent enzymatic hydrolysis in batch conditions. The extrusion allows a continuous, flexible and versatile process for high consistency media, easily transferable to the industrial level. However, complexity of both lignocellulosic biomass and lignocellulolytic enzymes and their interactions during the extrusion process are underlined by the literature. Numerous response surface methodology experiments with starchy biomass indicate that bioextrusion efficiency is mainly influenced by substrate and enzymes loading. Enzymatic activity during the bioextrusion process of lignocellulosic biomass is confirmed by the experiments despite the mechanical constraints and the limited residence time. During bioextrusion, best holocellulosic fraction hydrolysis results were obtained with high substrate and enzymes loadings. Significant modifications of the solid fraction like particule size reduction, visual deconstruction of the biomass structure, increased sensibility to thermal decomposition and the evolution of the surface exposure of crystalline and amorphous cellulose were observed. Enzymatic hydrolysis of the bioextrdates is prolonged in batch conditions. Clear improvements of speeds and rates of sugars conversion up to 48 h indicate a long term influence of the bioextrusion. Gain observed are steady for the pretreated wheat straw whereas it increases with time for corn residues and birch barks. Post-extrusion, a negative influence of the substrate loading is measured. However, best enhancements for the glucose conversion of pretreated wheat straw are detected for high substrate and enzymes loadings. From 4 to 48 h, significant losses in xylose conversion are measured with previous bioextrusion. Indicators of the solid fraction deconstruction, observed during the bioextrusion step, indicate a stronger biomass degradation after 48 h. Improvements of glucose conversion rates can be associated with good mixing conditions of the extruder, especially due to the use of kneading elements. Enzymes are probably more homogeneously distributed (distributive mixing) and can access more catalytic sites available. Moreover, dispersive mixing limits the enzyme jamming due to the biocatalysts concentration. Extrusion process permits an better agitation efficiency, good mass transfer conditions and probably a higher contact between substrate and enzymes. Lower xylose conversion results may be attributed to non-specific adsorptions or inactivation phenomena due to mechanical constraints and lignin residues. Good deconstruction results on the solid fraction may be associable with a synergetic action between mechanical and biochemical constraints. Autofluorescent signal analysis of the lignin fraction show its evolution during the deconstruction of the solid residue. During the hydrolysis, a progressive production of very small particles, appearing to be associated with the lignin fraction is observed. Lignin-carbohydrate complexes are also detected in the liquid fraction. These heteropolymeric complexes, difficult or even impossible for the enzymes to hydrolyze, are an obstacle to the biomass valorization. If lignin deconstruction is mainly due to the alkaline pretreatment, bioextrusion process seems to reduce the proportion of these heteropylymers with high molecular weights
Thiebaud-Roux, Sophie. "Valorisation chimique de composés lignocellulosiques : obtention de nouveaux matériaux". Phd thesis, Toulouse, INPT, 1995. http://oatao.univ-toulouse.fr/7362/1/thiebaud.pdf.
Texto completoGourson, Catherine. "Valorisation de polysaccharides contenus dans les céréales en vue de l'obtention de nouveaux matériaux biodégradables". Limoges, 1998. http://www.theses.fr/1998LIMO0034.
Texto completoBarreteau, Hélène. "Recherche de molécules à activité antimicrobienne dans des coproduits végétaux issus des industries agroalimentaires". Amiens, 2004. http://www.theses.fr/2004AMIE0417.
Texto completoOsman, Hassan Zeinab. "Valorisation des panneaux de particules à partir de déchets agricoles, de tanins d'acacia nilotica et d'adhésifs synthétiques". Nancy 1, 2003. https://hal.univ-lorraine.fr/tel-01746751.
Texto completoThe ground bark of subspecies of Acacaia nilotica, nilotica (Ann), tomentosa (Ant) adansonii, (Ana) and its pods (Pana) were extracted with hot water (90-95° C) for extraction period of 24 hours, then the extracts were spray dried at 65 °C, using a laboratoty spray dryer. The structural characteristics of the tannins derived from the four subspecies of Acacia nilotica were determined on their concentrated solutions by using different techniques such as C13 NMR analysis, measuring their gel times, Chemwindows and MALDI-TOF. The search for cheaper synthetic adhesives with high performance led to acceleration of the hardening of low condensation phenol formadehyde, PF resins (whichis known by having a long pressing time by addition of accelerators such as tannins, PMDI and urea. Evaluation of the low quality fibers (eucalyptus species) agricultural wastes (bagasse) and the bast plants (hemp) as sources of particles for panels manufacture has been studied. The hemp showed a great potentiality for production of panels suitable for furniture and joinery applications according to European standard European standard EN312 - 3, with most of the adhesive formulations used. However, the eucalyptus and the bagasse both fibers performed well with the tannins / paraformaldehyde glue mix. PUF alone and PMDI alone produced panels sometimes exceeding the specifications of European standard for panels for interior uses
Lacour, Joaneson. "Valorisation de la fraction organique de résidus agricoles et autres déchets assimilés à l'aide de traitements biologiques anaérobies". Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00825479.
Texto completoLacour, Joaneson. "Valorisation de la fraction organique de résidus agricoles et autres déchets assimilés à l’aide de traitements biologiques anaérobies". Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0026/document.
Texto completoIn rural and peri-urban areas of Haiti, organic wastes and residues generated mainly by agricultural activities and agribusiness, are traditionally valued in situ in animal feeding as feed, in the fertilization of the soil as organic conditioner and/or for energy purposes as fuels. In parallel, the organic wastes of the cities are predominantly eliminated without any form of segregation in non-controlled landfills. This research work aimed to place the emphasis on the opportunity of valuing these wastes by biomethanation as an alternative way of biological treatment of organic biodegradable wastes. The exercise of assessment of organic wastes production has highlighted a loss of wastes-resources estimated at about 2 960 000 tons of dry matter per annum, potentially convertible to 367 500 000 Nm3 of methane or 310 000 toe, corresponding to approximately 16% of recovery of the final energy demand of the households of the whole country. The experimental approach at laboratory scale allowed to assess the ultimate biomethane potential different types of agricultural wastes like bagasse, cabbage and cattle, pigs and chickens manures as well as the possibilities of optimizing the kinetics of anaerobic digestion by some inexpensive means as the reduction of the particles size, the increase of ratio IVS/SVS, the nutrient balance and the synergy effects of co-digestion. The special conditions of implementation of the pilot approach have demonstrated the feasibility of the development of biomethanation technology, with a return period of about 5 years
Melzer, Michael. "Valorisation énergétique des sous-produits agricoles en zone sub-saharienne : pré-conditionnement de la biomasse par pyrolyse flash". Thesis, Compiègne, 2013. http://www.theses.fr/2013COMP2098/document.
Texto completoSub-Saharan West Africa lacks of natural resources, especially for energy production. By-products of agro-industry as cashew nut shells (CNS), jatropha (Jc) and shea (Sc) press cakes were identified as available resources for energetic valorisation. These biomasses are characterized by high extractive contents (cashew nut shell liquid/CNSL or triglycerides) which are the reason for toxic fumes during combustion. The thesis investigated the feasibility of flash pyrolysis as alternative process for these resources, more specifically the impact of the extractives on yields, the composition and the stability of flash pyrolysis oils. The feedstock were derived into samples covering the whole range of extractive contents (from de-oiled press cakes, ~0 wt%; to pure extractives, 100 wt%) which were characterized and pyrolysed in two laboratory devices (TGA and tubular furnace), then by applying flash pyrolysis conditions in a fluidized bed reactor. No significant interaction in-between the solid matrix and the extractives during pyrolysis were observed but different products were identified. CNSL volatises between 250 and 320°C, several phenolic compounds and typical compounds of crude CNSL were found to be present in the pyrolysis oil. In contrast, triglycerides are entirely decomposed at 380 to 420°C to give linear hydro-carbon chains. Some interaction products of the triglycerides with proteins were identified. Additionally, the experiments with the pilot plant have shown operational difficulties in the fluidized bed, which are linked to specific properties of the press cakes. Thus, further optimisations of process conditions are suggested. To overcome the observed phase separation of the pyrolysis oils mixtures with other biofuels were studied. The obtained emulsions are more homogeneous but the physical stability is still insufficient despite the addition of surfactants
Szalata, Claude. "Acide lévulinique : exemple pour la valorisation conjointe d'un produit issu de la "biomasse" en chimie thérapeutique et chimie de polymères". Reims, 2010. http://www.theses.fr/2010REIMP203.
Texto completo@Utilisation of agro-ressources has been a main target of chemical research groups all over the world for some years now. Levulinic acid fits perfectly in this line for severals reasons as developed in this thesis. To start, some unsaturated levulinates have been synthesized from biomass. The avantages of these derivatives lies in their conjugated insaturation (enone and acrylate) enabling their wide range utilisation in synthetic chemistry. In this manuscript, results collected on all these applications will be presented. Further, a method for the synthesis of carbonylated heterocycles has been studied. It was based on a cascade reaction involving primary amines and alkyl 5-bromo-4-oxo-pent-2-enoates. In addition, a preliminary study dealing with the reach of novel and selective 5-HT6 receptor ligands has been carried out. Therefore, two families side-chain substituted tryptamine derivatives have been synthesized. The first ones, the azetidin-3-one tryptamine derivatives have been prepared by the previous method and on the other hand, N, N-dimethylcyclopropylated tryptamine derivatives have been obtained by an original titano-mediated cyclopropanation in cooperation with Pr. Szymoniak’s team. To finish, ethyl-oxo-pent-2-enoate which is new “green monomer” has been used for a study of photoinduced copolymerisation
Viel, Maurice. "Controle et valorisation de la thermogénèse microbienne au cours de la biodégradation aérobie de déchets agro-industriels et urbains à teneurs variables en graisses". Toulouse, INPT, 1989. http://www.theses.fr/1989INPT030A.
Texto completoBenrachedi, Khaled. "Valorisation d'un copolymère d'éthylène vinyl-acétate par ozonisation. Emulsions adhésives et applications". Toulouse, INPT, 1993. http://www.theses.fr/1993INPT010G.
Texto completoBelkacemi, Khaled. "La valorisation des résidus agricoles par hydrolyse acide et enzymatique : application aux tiges de maïs et à l'alfa (stipa tenacissima)". Thèse, Université de Sherbrooke, 1990. http://savoirs.usherbrooke.ca/handle/11143/1649.
Texto completoVandal, Francis. "Analyse avantages-coûts de la valorisation des boues d’usine d’épuration des eaux usées sur les terres agricoles: cas de Lac-Mégantic". Mémoire, Université de Sherbrooke, 1995. http://hdl.handle.net/11143/11161.
Texto completoFahimi, Akbar. "Déréticulation d'un déchet à base d'éthylène-vinyle acétate par l'ozone et sa valorisation dans le bitume". Toulouse, INPT, 1992. http://www.theses.fr/1992INPT029G.
Texto completoMughal, Arshad Saleem. "Valorisation industrielle intégrée d'agro-ressources non alimentaires : contribution au développement d'une méthodologie d'analyse énergétique et environnementale basée sur le génie des procédés". Toulouse, INPT, 1994. http://www.theses.fr/1994INPT042G.
Texto completoVoegel, Célestine. "Impact BIochimique des effluents agricoles et agroindustriels sur les structures/ouvrages en BEtOn dans la filière de valorisation par Méthanisation (ou codigestion anaérobie)". Thesis, Toulouse, INPT, 2017. http://www.theses.fr/2017INPT0044/document.
Texto completoAnaerobic digestion consists in the degradation of organic matter by the successive actions of microorganisms, industrially operated in digesters made of concrete. Microbial metabolites (volatile fatty acids (VFA), NH4+, CO2) produced during this process attack the cementitious matrix of the concrete. To ensure the development of this new industrial field, it appears essential to understand first the alteration phenomena, then to propose durable solutions for digesters’ construction materials. The thesis’ objectives were first to identify and to quantify the aggressive agents for concrete in anaerobic digestion media, then to understand their impacts on the cementitious materials’ alteration mechanisms. Finally, the impacts of those media were compared on different cement pastes made of : ordinary Portland cement, blast furnace slag cement, calcium aluminate cement or alkali activated materials. During laboratory tests, the maximal concentration in aggressive agents measured during the digestion of a synthetic biowaste were 3 000 mg.L-1 of VFA, 800 mg.L-1 of NH4+, and 140 mg.L-1 of dissolved CO2. The colonization of the microorganisms able to produce the aggressive agents has been observed on the cementitious materials’ surfaces exposed to the biowaste during digestion. The external degraded layers of the exposed cementitious materials are partially decalcified, most likely regarding to the action of the VFA and the NH4+. Carbonation has also been detected caused by the dissolved CO2. In situ experiments, in real conditions, achieved in an experimental anaerobic digestion platform, confirmed the alteration phenomena distinguished in the laboratory tests. In terms of durability, calcium aluminate cement present the best performances against the biochemical attacks compared to ordinary cement or blast furnace slag cement in laboratory or in situ anaerobic digestion systems
Koledzi, Komi Edem. "Valorisation des déchets solides urbains dans les quartiers de Lomé (Togo) : approche méthodologique pour une production durable de compost". Limoges, 2011. https://aurore.unilim.fr/theses/nxfile/default/94ccd76c-1e63-4a7d-8512-0789b0d2fd61/blobholder:0/2011LIMO4002.pdf.
Texto completoThis research led to the establishment of the recovery of solid waste generated in the districts of Lome by composting ; the production of compost adapted to conditions in the city of Lome was evaluated from the production of waste in households up the agricultural use of produced compost. This study provides a guide for developing a sustainable production of compost in Lomé, it consists of five chapters : -study of the waste generation, - evaluation of primary collection, -optimization of composting parameters, -agricultural development and conceiving a sustainable composting process chain. Data obtained on the field for two years and two seasons (wet and dry), constitute not only the first database on the nature of the waste produced in Lome, but also a real tool for decision support for local deciders. Analysis of the pre-collection carried out by NGOs, identified the most relevant performance indicators. The composting process was optimized in terms of mass balance and quality of compost. Experiments in open fields with the produced compost were very interesting in terms of improved soil and crop. A platform model for informal sorting-composting plant (<5T/day), decentralized in the districts, was finally given on the basis of the obtained results
Smagghe, Freddy. "Séparation des acides tartrique et malique par extraction liquide-liquide. Valorisation et dépollution des effluents viti-vinicoles". Toulouse, INPT, 1991. http://www.theses.fr/1991INPT040G.
Texto completoMzahma, Sourour. "Impact sur des sols agricoles et des plantes de l'irrigation par des effluents textiles traités". Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAH001.
Texto completoThe textile industry is the most polluting of all industrial sectors. This sector is not only a large consumer of water, but it also discharges enormous quantities of wastewater loaded with salts, dyes, detergents, heavy metals, degradable organic materials, stabilizing agents, etc. The discharge of this water presents risks for hydro-ecosystems, soil, and plants. In addition to the harmful effects of untreated textile effluent on the environment, there is the problem of water scarcity which is becoming increasingly serious. the high demand for water in the agricultural sector, and the lack of fodder in some countries around the world such as Tunisia. In this sense, several processes have been developed to treat textile effluents such as chemical oxidation, chemical coagulation, biodegradation, adsorption, and membrane processes. However, few studies have focused on the impact of irrigation with these treated effluents on soils and plants.The objective of this thesis is the reuse of treated textile effluent (TTE) using scenarios of agricultural valorization of these waters. This work consists of submitting biological treatment (TB) effluents from a Tunisian textile factory to additional treatments by ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). Given that TB effluents are characterized by high salinity, a coupling scenario was considered by mixing 50/50 (V: V) biological treatment water (TB) with well water (S) (TB/S) and NF waters (TB/NF). The impact of irrigation with these waters on the physicochemical and biological parameters of the soil and on the growth, mineral composition, and absorption of MTE in a forage plant: Sesbania bispinosa was evaluated. A physicochemical characterization of irrigation water was carried out with an evaluation of the genotoxic potential of soils irrigated by TTE.The results indicate that the quality of TTE is not stable over time and varies according to the production processes. TB does not meet the requirements of the NT 106.03 standard relating to the reuse of wastewater in agriculture. These waters are characterized by high pH, EC, and Na+, Cl- and SO42- contents. Although NF and RO membranes effectively reduce salinity and the contents of these elements and do not present any risk to the soil and plants with the absence of genotoxic effect of soils on plants, these techniques produce more concentrated water discharges. Consequently, the coupling of TB water with well water constitutes the best alternative for agricultural valorization. This coupling made it possible to reduce the salinity of TB water by reducing the contents of chemical elements such as Na+, Cl-, and SO42-. The reuse of this water for agricultural purposes did not show negative effects on the growth and mineral nutrition of S.bispinosa, did not present risks on the physico-chemical quality of the soil, and contributed to an improvement in enzymatic activity in the soil. Therefore, water coupling constitutes a valorization option. It is a simple and inexpensive solution which, on the one hand, makes it possible to overcome the lack of water and, on the other hand, reduces the quantities of water released into the environment by the textile industries
Paguet, Anne-Sophie. "Valorisation de la diversité chimique et génétique du houblon sauvage de la région Hauts-de-France dans un objectif de développement variétal et d'applications agro-alimentaires et agricoles". Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILR035.
Texto completoHop, Humulus lupulus L., is a traditional crop of Northern France. Female inflorescences, also named cones or hops, are used in brewing to provide bitterness and aroma to beer, as well as for their antimicrobial properties. These properties are closely connected to their original chemical composition. In particular, hops produce prenylated chalcones including xanthohumol and desmethylxanthohumol as well as acylpholoroglucinol derivatives with humulone derivatives (α-acids) and lupulone derivatives (β-acids). Moreover, hop essential oil is mainly represented by non oxygenated monoterpenes and sesquiterpenes (β-myrcene, β-caryophyllene and α-humulene). The bitterness sought by brewers is due to the alpha acids, while the aromas come from the volatile compounds. In recent years, the new interest of consumers for craft and aromatic beers has given a new dynamism to the hop sector in the region. In this context, our study aims to investigate the genetic, chemical and phenotypic diversity of wild hops from Northern France, recognized as a potential source of interesting traits for varietal improvement. For this purpose, fifty wild hops were collected on different biotopes in Northern France and replanted in experimental hop fields. These wild hops were compared to ten commercial varieties grown in the region, and three old varieties. Biotope characterization was performed on soil samples. Genetic analyses of the different hop were focused on the study of microsatellite regions. Phytochemical characterization of hops collected in-situ and ex-situ was focused on the quantification of major prenylated phenolic compounds by UHPLC-UV, non-targeted metabolomic analysis by UHPLC-HRMS, and volatile compound analysis by HS-SPME GC-MS. Beers were also brewed with some hops from our collection and were subjected to physicochemical characterization, analysis of their volatile compound composition by SBSE-GC-MS and organoleptic characterization by a panel of tasters. The multivariate data obtained during these different analyses were correlated by multifactor analysis. These results revealed a high genetic and chemical diversity among the wild accessions, but also the importance of the terroir effect on the chemical composition of hops. These different datasets and their statistical analysis constitute a solid support for the study of this diversity
Carretier, Séverine. "Intérêts des procédés membranaires dans le post-traitement des digestats liquides et valorisation des co-produits". Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20049/document.
Texto completoIntense spreading of livestock wastes are recognized to be detrimental to the environment due to their content of organic matter and mineral fraction. Then, it would appear to be necessary to promote greens treatments processes. In fact, anaerobic digestion allows the production of biogas (extremely useful source of renewable energy), whilst digestate should be a highly valuable biofertilizer This work enters in this approach by proposing to complete anaerobic digestion steps by the use of perm-selective membrane separation process. The first step is a clarification step by ultrafiltration, following by a soluble mineral concentration step by nanofiltration, low pressure and/or high pressure reverse osmosis (LPRO, HPRO). The tests were performed in a laboratory-scale pilot unit using real digestates. For clarification step, a cross-flow mode separation is obligate in view of suspended solid concentrations and viscosity which appeared as a determining factor for the choice of operative protocol. In any case, the ultra-filtration operation allows a high organic retention rate (of 80 to 90%). Conversely, soluble mineral retention remained at negligible as expected. The cut-off of ultrafiltration membrane is not a determining factor for this retention. Despite the cross-flow mode separation filtration induces a compound accumulation on the membrane which decreases significantly the permeability of filtering media. This permeability drop appears greater when suspension presents a high COD concentration. This criterion appears as a limiting factor to achieve a high volumic concentration factor (VCF). Membrane surface to develop is then directly related to the membrane permeability which depends on the digestate origin and VCF. The operational cost is linked directly to the energy required to ensure cross-flow mode. The retention of soluble mineral compounds by HPRO exceeds 90% whatever the target ions or the origine of digestate are. However, for NF and LPRO steps, this rejection depends on the target ions or the origine of digestate. In any case, organic retention is important (more than 90%) which allows significant discoloration of permeate. The, the more the electronic conductivity (EC) is, the more permeability decreases of suspension is important, due to an osmotic pressure and soluble compound accumulation on the membrane that increases with EC. This conductivity depends on initial digestate and, of course, of the chosen VCF target, which appears as decisive parameter for unit dimensioning. On the efficient energy, energy linked to separation step chosen is dominant in the absence of cross-flow mode of retentate. This work has allowed to confirm the potential interest of membrane separation to (i) obtain a final effluent: named fresh or new water and (ii) and (ii) to allow the production of liquid fertilizers.This work is financially supported by the National French Agency (Bio-Energy Program 2010, DIVA Project) and by TRIMATEC competitiveness cluster
Krausova, Rambure Katerina. "Vers de nouvelles matrices minérales pour l'immobilisation et la valorisation des déchets ultimes de l'incinération des déchets ménagers". Phd thesis, Université Paris-Est, 2013. http://tel.archives-ouvertes.fr/tel-00975213.
Texto completoDe, Lopez Sophânara S. "Contribution à la définition d'une filière intégrée de valorisation des pailles de céréales : étude de l'impact d'une pré-extraction alcaline des hémicelluloses sur la production de pâte à papier". Toulouse, INPT, 1995. http://www.theses.fr/1995INPT017G.
Texto completoBabau, Maud. "Croissance et accumulation lipidique de Rhodotorula glutinis (rhodosporidium toruloides) sur glucose, xylose et glycérol : vers la valorisation des coproduits agricoles et industriels pour la production de lipides à usages énergétiques". Thesis, Toulouse, INSA, 2015. http://www.theses.fr/2015ISAT0027/document.
Texto completoRhodotorula glutinis (Rhodosporidium toruloides) is an oleaginous yeast. The micro-organism has demonstrated high lipid accumulation when utilizing glucose as a substrate, and has become a model for oil production. Glycerol and xylose are interesting as substrates for production of oil from renewable resources, but the capacity of R. glutinis to utilize glycerol and xylose as substrates has not been characterized well. Fermentation strategies were designed to quantify growth and lipid accumulation dynamics of R. glutinis when utilizing glycerol and xylose - either as pure substrates, or as co-substrates with glucose. Several original results have been found, including: - Co-consumption of xylose or glycerol along with glucose was observed, without carbon substrate accumulation or byproduct formation, when the carbon feed rate was carefully controlled. The specific carbon consumption rate decreases when the proportion of the second substrate (glycerol or xylose) increases in the feed, relative to glucose. - Growth capacities were characterized on pure xylose and pure glycerol in terms of growth rate and carbon yields: on xylose μmax= 0.034h-1 and RS/X= 0.28 Cmolx.Cmolxylose-1; on glycerol μmax=0.04h-1 RS/X=0.31Cmolx.Cmolglycerol-1. - specific production rate of lipid production and substrate to product carbon conversion yields from xylose or glycerol as single or cosubstrate with glucose were determinated: 20%xylose-80%glucose : qp=0.065CmolTAG.Cmolbiomasse.h-1, RS/P=0.3CmoleTAG.Cmolesubstrat-1 100%xylose : qp=0.035065CmolTAG.Cmolbiomasse.h-1, RS/P=0.31CmoleTAG.Cmolesubstrat-1, 25% glycerol-75%glucose : qp=0.07065CmolTAG.Cmolbiomasse.h-1, RS/P=0.25CmoleTAG.Cmolesubstrat-1 , 100% glycerol : qp=0.03065CmolTAG.Cmolbiomasse.h-1, RS/P= 0.29CmoleTAG.Cmolesubstrat-1. - Substrate diversification slightly impacts Rhodotorula glutinis´s lipid profile: xylose leads to an overproduction of C16:0 and C18:3 and glycerol increases C18:0 accumulation
Rojo, Poveda Olga. "Valorisation of Compounds with High Nutritional Value from Cocoa By-Products as Food Ingredients and Additives". Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/322988.
Texto completoDoctorat en Sciences biomédicales et pharmaceutiques (Pharmacie)
info:eu-repo/semantics/nonPublished
Koti, Joël. "Valorisation des coques de noix de palmiste dans la construction des routes à faible trafic". Thesis, Limoges, 2022. https://aurore.unilim.fr/theses/nxfile/default/f79d4974-f3cb-47d7-8a60-ec5e92d65af9/blobholder:0/2022LIMO0062.pdf.
Texto completoThe production of palm oil generates several wastes including palm kernel shells (PKS). Facing the depletion of natural resources that can be used in pavement construction, the recovery of agricultural waste such as palm kernel shells is an alternative solution for the future for oil palm producing countries. This thesis studies the use of palm kernel shells as coarse aggregate in the formulation of composites materials. The latter can be used as subbase course materials for low-traffic pavements. The first part of the manuscript deals with the production of mixtures of palm kernel shells and lateritic soil (lateritic soil abundant in the south of Benin) for use as a foundation layer. Parabolic law of Fuller-Thompson is utilized to determine the volume proportions of each composite. In the laboratory, geotechnical experiments on lateritic soil and on composites have shown that the addition of 61% PKS increases the CBR index from 76% to 95% of the Modified Proctor optimum. The addition of 15% lagoon sand in the formulation decreases the plasticity by 29%. Thus, the composites with a CBR index of 30 (39% lateritic soil + 61% PKS) and 41 (45% lateritic soil, 40% PKS and 15% lagoon sand) can be used in the foundation layer for low traffic roads. The second part focuses on the substitution of the traditional coarse aggregates by palm kernel shells in a semi-grained bituminous concrete 0/10. This type of asphalt is usable in surface wearing course. The different granular compositions are obtained by the compressible stacking model of De Larrard. The moisture resistance, studied through the Duriez test, shows that PKS can be a good alternative of coarse aggregates in lightly trafficked pavement mixes. The valorization of palm kernel shells in transportation technology is a major technical and economical solution to provide a better access to the rural areas in tropical countries. Especially, it can be useful for the transport of products from production areas to those of processing and consumption
Kerfai, Syrine. "Etude d'un procédé chromatographique d'échange d'ions pour la séparation de la ribulose 1,5-diphosphate carboxylase (Rubisco) dans le cadre de la valorisation d'un sous produit agricole". Thesis, Toulouse, INSA, 2011. http://www.theses.fr/2011ISAT0014/document.
Texto completoBiological raw material derived from bio-refinery processes, is often considered a source of pollution but it seems also to be a promising alternative to potential material recovery. The development of suitable processes for handling such complex biological material has so many concerns. Green juice produced from mechanical dehydration of Alfalfa (Medicago sativa) is an excellent source of protein with high nutritional quality. Ribulose-1,5-bisphosphate carboxylase oxygenase (Rubisco) is the most abundant protein in the green juice, with potential applications in many fields, such as human nutrition, pharmaceuticals, environmental… The aim of this study is to isolate and recover Rubisco produced from an industrial alfalfa green juice, by ion exchange chromatography process. First of all, a qualitative and quantitative analytical method was developed to provide reliable information about Rubisco content monitoring in the separation process. In a second step, the separation process was performed in fixed and expanded bed, using the anion exchanger Q Hyper Z. In both cases, the effect of the dilution of the green juice on the dynamic capacity of the columns was studied. The results showed that the dynamic capacity retention was similar in both columns to those reported in literature. After elution step, Rubisco was concentrated 21 times and produced with high level of purity. Furthermore, kinetic of ion exchange study was initiated. Despite the large size of the protein (560 kDa), steric limitations to mass transfer were not very significant when compared to those of conventional small proteins. The support Q Hyper Z showed an excellent affinity for the protein recovery. Finally, a first theoretical investigation has been conducted for understanding the retention mechanism between the protein and the separation column. This study shows the importance of taking into account the presence of other bio-molecules in order to perform the retention of Rubisco, perhaps even more than that of salts
Neya, Béli. "Valorisation de la biomasse du Burkina faso : faisabilité de panneaux de particules à base de déchets agricoles et recherche de nouveaux biocides pour la préservation du bois à partir d'essences naturellement durables". Nancy 1, 2002. http://docnum.univ-lorraine.fr/public/SCD_T_2002_0253_NEYA.pdf.
Texto completoThe first part of work concerns the manufacture of particle boards with sugarcane bagasse or rice husk using various resins among which Melamine-Urea-formaldehyde resins (MUF), Phenol-Formaldehyde resins (PF), polyisocyanates resins (PMDI) and finally of mixtures of PMDI/PF resins. The results obtained show that utilization of PMDI resins gives the best results (good mechanical properties and good water resistance), while PF resins lead to slightly lower results. Mixtures PMDI/PF don't give the awaited results, particle boards obtained having properties similars to those obtained with PF resins. MUF resins lead to the less satisfactory results. The second part of the work, concerns the study of reasons of the natural durability of Burkea africana, Prosopis africana and Pterocarpus erinaceus woods in order to identify new biocides for wood preservation. The separation of the extracts matters contained in the different woods and the study of their fungicidal properties indicates the biocidal properties of some of the compounds contained in the extracts. The study of wood durability undergone with or without preliminary extractions shows that the presence of biocidal compounds in the extracts does not allow to explain the resistance of studied wood to fungi and termites attack. The hydrophobic character of wood as its strong dimensional stability would be also a significant factor of its resistance. The analysis of the products in the etheral extracts indicates the presence of greases, waxes and squalene which can be at the base of the preceding results
Metivier, Romain. "Ecologie microbienne de produits végétaux : Adaptation de traitements assainissants pour la valorisation de ces produits". Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0419/document.
Texto completoThe use of byproduct as raw material from another industrial sector, facts that it is not considered any more as "waste". Their valuation is thus an axis of development for the agronomic and food-processing industry. However, their new consideration of "raw material" entails constraints for the industrialists. These constraints are diverse according to the destination ways of the byproduct: sanitary, toxicological… This work focus on two byproducts resulting from different vegetable process: (1) apple peels, as antioxidant source. Their valuation needs to use raw materials with low phytosanitary treatment, so these materials may be more contaminated by different floras. (2) Crushed vegetable matter stemming from cereal crop as raw material of biosourced products. They occur naturally a strong microbial spore contamination. The valuation of these two byproducts requires adapted cleaning treatments. So, it was the main thing to determine nature, variability and evolution of the present microbial ecologies of these byproducts by fast techniques of enumeration and identification by molecular biology. The study of different cleaning process was also realized to combine efficiency of disinfection with the preservation of nutritional qualities (apple) or physical properties (crushed vegetable matter)
Praly, Cécile. "Nouvelles formes de valorisation territoriale en agriculture : le cas de l’arboriculture de la moyenne vallée du Rhône". Thesis, Lyon 2, 2010. http://www.theses.fr/2010LYO20038/document.
Texto completoThe fruit growing sector in the Middle Rhône Valley, competed by low-cost-production countries, faces a serious structural crisis. Then, we analyze the links between the arboriculture and its territories which can constitue resources mobilized as territorial valorization forms by local actors.The historic productive model of the arboriculture in the Middle Rhône Valley, the production-shipping basin, is now questioned by two rival forces. The first, called « centrifugal », is exercised by the main shippers who enlarge their supply area to be able to deliver large volumes of standardized fruits, relevant for the main retailers demand. In the opposite, some « centripetal » forces produce a fragmentation effect in the basin. These result from territorial identification initiatives for fruits, lead by the producers.Between these forces, farmers develop some strategies to maintain economic viability of their farms. They add to the existing shipping-circuits news outlets which valorize various proximities between production and consumption. We describe multi-scale « proximity circuits », including different types of the fruits supply chain actors, of consumers and marketing chanels. These circuits are shaped by competition and complementarity relationships with the basin of production-shipping. They benefit from the local communities supports.The conclusion of the research displays a characterization of the different proximity circuits and a theorical model to analyze the diversity of territorial valorization forms in agriculture
Harchaoui, Souhil. "Modélisation des transitions en agriculture : énergie, azote, et capacité nourricière de la France dans la longue durée (1882-2016) et prémices pour une généralisation à l'échelle mondiale". Thesis, Université de Paris (2019-....), 2019. https://wo.app.u-paris.fr/cgi-bin/WebObjects/TheseWeb.woa/wa/show?t=3874&f=24611.
Texto completoTo overcome the challenges of climate change and energy transition, combined with the projected population growth in the 21st century, agriculture must transform itself to produce more food while reducing its dependence on non-renewables sources and preserving ecosystems. This thesis examines the impacts of biophysical constraints and socio-technical transformations on agricultural metabolism, transitions and feeding capacity of agriculture. Agricultural metabolism is modelled through both energy and nitrogen flows that the agricultural system mobilizes and converts to operate and to supply biomass. This analytical framework allows us, on the one hand, to position agriculture within the energy transition challenges and, on the other hand, to jointly quantify the achievable feeding capacity and its impact on global biogeochemical cycles. Agricultural metabolism is examined at two spatial and temporal scales: a long-term historical perspective modelling (1882-2016) at the scale of France and a historical (1961-2013) and prospective modelling at the global scale. The analysis of French agriculture is based on the modelling of historical production data and means of production. We explore the mechanisms that link the inputs and outputs of the agricultural system, together with the associated energy and nitrogen transitions continuously since 1882. We characterize the French trajectory on the basis of efficiency indicators, energy return on energy investment, farm surplus, self-sufficiency and energy neutrality of the system. Energy neutrality is a key indicator for positioning agriculture in the future energy transition. We quantify the impact of socio-technical transformations on transitions that have quadrupled the farm surplus and reduced its energy self-sufficiency to almost zero. Agriculture produced twice as much energy as it did in pre-industrial times, compared to four times today, but it has gone from an energy self-sufficient system fed by biomass to a system almost exclusively dependent on fossil fuels. Expressed in biomass equivalent, agriculture's current energy consumption is equal to its production, therefore a system that is not energetically viable. The challenge for agriculture is to contribute to the energy transition without encroaching on its food production. Meeting this challenge, which is little understood by society, requires improving the energy performance of agriculture and involves improving nitrogen use efficiency, as well as reducing livestock production, especially from monogastrics, decreasing farm labor needs, together with a high energy recovery from agricultural residues. Global-scale modelling allows us to describe the agriculture trajectory in terms of feeding capacity and environmental impact and to assess its food production limits on the basis of biophysical constraints. This modeling is a first module focused on the nitrogen metabolism and does not take into consideration the energy operating regime of agriculture. We examine the limits of world food production along with nitrogen losses according to degrees of nitrogen self-sufficiency. We show how maximum supportable human population on Earth can range from 6 to 17 billion people depending on the share of total grain production used in animal feed, the nitrogen use efficiency and the nitrogen fertilization regime. This analysis allows comparing, as it is rarely done, official population projections for the 21st century with planetary biophysical constraints and discuss the conditions under which these projections can be achieved
Tshinyama, Ntumba Albert. "Contribution à la promotion de la pisciculture intégrée de tilapia du Nil (Oreochromis niloticus, Linnaeus, 1758) par la valorisation des sous-produits agro-industriels et l'utilisation rationnelle des fertilisants animaux en République Démocratique du Congo". Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/34490.
Texto completoNile tilapia is one of the fresh water fish species that is best suited for low-input fish farming in tropical climate to alleviate food insecurity. The use of integrated aquaculture-agriculture (IAA) is a preferred approach for the sustainable development of rural aquaculture. This study was carried to assess the effects of feed and animal fertilizers (pig manure and duck droppings) on the physico-chemical and microbiological water quality, primary productivity of ponds, safety and fish growth, enzymatic digestibility of plant ingredients, feeding behaviour and production cost of Nile tilapia. The results showed that fertilization has influenced the physico-chemical properties of pond water without affecting negatively its quality. The best growth performance was recorded in fish fed with a formulated feed and those reared in fertilized ponds. Fertilization has improved primary productivity, with diatoms largely represented by a relative abundance of Flagilaria spp, the dominant prey in the stomach content of tilapia. Pretreatment of animal faeces by sun-drying prior to use, reduced bacterial infections in the analyzed samples, whose muscle tissues were colonized only by very minor bacterial infections (4.9%), compared to intestines (10.8%) and water (13.0%). Although higher in the first four intestinal segments, proteolytic activity was generally low in tilapia. The presence of protease inhibitors has been demonstrated in plant ingredients, of which soybean meal has been more inhibitive. Finally, the production cost/kg offish was reduced with formulated feed (1.5 USD/kg) compared to commercial feed (2.3 USD/USD), and this cost was further reduced for fish reared in fertilized ponds (0.4 USD/kg)
Ndiaye, Amma. "Etude comparée des stratégies de développement durable en Afrique subsaharienne basées sur la valorisation d'une agro-ressource spécifique : le cas de la spiruline". Thesis, Reims, 2018. http://www.theses.fr/2018REIME007.
Texto completoIn a context of major questioning about polluting industrial processes and mobilising non-renewable resources, structural modifications in order to set up sustainable production methods and to establish the economical growth in a long-term base, are namely necessary for african countries in their development stratégies.In this way, spirulina valorisation, a renewable resource, for multiple use and with outstanding properties, belongs in this logical.Besides its therapeutic values and nutritional qualities, spirulina is not only safe for environment, but also it presents interest due to photosynthesis.In terms of socio-economics, spirulina could bring significant response to underdevelopment problems, and namely malnutrition and poverty. Indeed, its valorisation permit to generate regular incomes to the persons who work in and also, permit financial empowerment of vulnerable population groups.Nowadays, spirulina valorisation spread accross Africa but continuity and succes of spirulina projects depend on various challenges to be met.Therefore, the aim of this work is to demonstrate in what way, how and under which conditions, sustainable development strategies based on spirulina valorisation can be a vector of development for Subsahara Africa countries
Rodrigues, Jérémy. "Analyse de cycle de vie intégrative de filières de production de biomasse à usage industriel par la valorisation de délaissés". Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0321/document.
Texto completoMarginal materials and lands (brownfields, byproducts, inert wastes), the management of which causes significant environmental impacts, can be valorized through soil construction in order to grow nonfood biomass (e.g. fiber, energy). This may reduce their volume and increase use of renewable resources without direct or indirect competition with food crops or biodiversity. This thesis assesses the sustainability of such supply chains with Life Cycle Assessment (LCA), considered one of the most pertinent existing methods. This thesis introduces indicators complementary to current use, in order to improve LCA’s exhaustivity and its taking into account of marginal lands’ specificities. It prioritizes impacts with respect to planetary boundaries (i.e. maximum impacts levels acceptable to avoid ecosystem disruption), average impacts in studied geographic context and added value of the supply chains. Most of these suggestions are applied to the study of a soil construction process using inert and organic wastes (LORVER). The high diversity of materials and alternative management strategies and the most certain tradeoffs and critical parameters are assessed combining uncertainty and multidimensional analysis tools. Constructed soil’s ability to stabilize carbon and pollutants is demonstrated to be its major condition for sustainability. For other impacts (ecosystem services, air quality, resources), LORVER is even less pertinent when the need for material transportation increases, and more importantly if those materials could have otherwise been used to replace commodities polluting to produce. These results highlight when LORVER can be seen as sustainable
Grigoraş, Cristina-Gabriela. "Valorisation des fruits et des sous-produits de l'industrie de transformation des fruits par extraction des composés bioactifs". Phd thesis, Université d'Orléans, 2012. http://tel.archives-ouvertes.fr/tel-00772304.
Texto completoPierre, Floran. "Traitement thermique du bois en vue de sa valorisation énergétique : effet de l'intensité de traitement sur la composition chimique, les propriétés énergétiques et la résilience mécanique". Phd thesis, AgroParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-01066141.
Texto completoTellez, Perez Carmen. "Valorisation de la production agricole mexicaine par préservation et séchage par autovaporisation instantanée : cas du piment vert". Phd thesis, Université de La Rochelle, 2013. http://tel.archives-ouvertes.fr/tel-01066765.
Texto completoFevre-Gautier, Anne-Lise. "Analyser la durabilité du développement de valorisations non alimentaires d'agro-ressources". Phd thesis, Université de Technologie de Troyes, 2009. http://tel.archives-ouvertes.fr/tel-00453261.
Texto completoFèvre-Gautier, Anne-Lise. "Analyser la durabilité du développement de valorisations non alimentaires d'agro-ressources". Troyes, 2009. http://www.theses.fr/2009TROY0002.
Texto completoThis thesis is about our analysis of the activities of the French competitiveness cluster "Industrie et Agro-Ressources" (IAR) with regard to the different stakes of sustainable development. Established in 2005 in the Picardie and Champagne-Ardenne regions, this cluster supports innovative valorisation projects of agricultural resources by industry. Our approach is based on an analysis of the challenges that sustainable development aims to solve, with a particular focus on the case of the agriculture and agro-industries. We also use ideas and concepts from several types of sustainability analysis methodologies, including the construction and use of sustainable development indicators. This work resulted in the development of IDDAgro, a decision support system dedicated to the evaluation of the sustainability of projects supported by the IAR cluster. One backbone of this set of sustainable development indicators is the assessment of the potential impacts of agro-industrial projects life cycels. Our approach was validated by applying the IDDAgro tool to real life projects. Limited access to information necessary for sustainability assessments was the main obstacle in this research. It prevented the planned application of our approach to study the ethanol production of one of the IAR cluster's partners, for which a literature study had been carried out. All these results finally enabled us to develop and present concrete suggestions to the IAR cluster. They aim at improving the integration of sustainable development stakes in its activities
Diedhiou, Djibril. "Fractionnement analytique de la graine de neem (Azadirachta indica A. Juss.) et de la graine de dattier du désert (Balanites aegyptiaca L.) - Valorisation des constituants de la graine de neem par bioraffinage". Thesis, Toulouse, INPT, 2017. http://www.theses.fr/2017INPT0135/document.
Texto completoNeem and desert date seeds were characterized and their fractionation perspectives oriented. A process of fractionation of neem seeds in twin-screw extruder has been studied for the purpose of production and integrated valorization of its fractions: oil, co-extract of azadirachtin, proteins and lipids, and extrusion raffinate. The use of water and water/ethanol mixtures (up to 75% ethanol) with a twin-screw extruder configuration defining four zones (a feed zone, a grinding zone, a solidliquid extraction zone and a solid / liquid separation zone), allows to extract from the filtrate 83 to 86% of the azadirachtin, 86 to 92% of the lipids and 44 to 74% of the proteins of the seed thereby producing a raffinate essentially fibrous containing at most 8% lipids, 12% proteins and 0.82 g/kg azadirachtin. One of the best ways of processing the suspension that is the crude filtrate, is a solid-liquid separation by centrifugation. This separation process makes it possible to obtain a diluted emulsion containing 42 to 64% of the lipids and up to 41% of the proteins of the seed. A centrifugation achieves it effectively, but this separation process can have disadvantages in the treatment of large volumes. Considered as a by-product of the treatment of crude filtrate, the insoluble phase can contain 42 to 64% of the lipids, 32.9 to 47% of the proteins and 10 to 13% of the azadirachtin of the seed. Water has proven to be the best solvent in this fractionation process. The pressing of the neem seeds followed by the aqueous or hydroalcoholic extraction in the same twin-screw extruder makes it possible to extract up to 32% of the oil of the seeds and to recover 20% of the seed oil in clear form, with very little azadirachtin, ensuring better extraction yields of azadirachtin and proteins to the crude filtrate. Two treatment pathways of the filtrates were studied: one leading to an emulsion of azadirachtin and another to a freeze-dried powder of azadirachtin. The valorization of the fibrous extrusion raffinate has been oriented towards the production of agromaterials by thermopressing. A biorefinery scheme of the neem seed for the valorization of its constituents has thus be implemented
Abidi, Nabil. "Valorisation du lactose et du lactosérum en acide succinique par fermentation bactérienne". Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26699/26699.pdf.
Texto completoKane, Isabelle Céline Leroux Marcel Sall Mamadou. "La valorisation du prélèvement végétal un pari écologique et économique pour le monde paysan en milieu sud-soudanien sénégalais /". Lyon : Université Lyon 3, 2006. http://thesesbrain.univ-lyon3.fr/sdx/theses/lyon3/2006/kane_ic.
Texto completoThèse soutenue en co-tutelle. Titre provenant de l'écran-titre. Bibliogr.