A modified two-element membrane pressure vessel assembly has been used to monitor process operational changes in a full-scale reverse osmosis (RO) water treatment plant (WTP). This study evaluated the effectiveness of the assembly as an on-line monitoring device intended to detect scale formation conditions when connected to an operating RO process train. This study was implemented to support the requirements of a larger University of Central Florida (UCF) research project ongoing at the city of Sarasota’s Public Works and Utilities (City) water treatment facilities located in Sarasota, Florida. During the time-frame of this study, the City was in the process of eliminating their sulfuric acid feed from the pretreatment system of their existing 4.5 million gallon per day (MGD) RO membrane process. The City was motivated to eliminate its dependence on sulfuric acid to reduce operating costs as well as reduce operation health and safety risks associated with the use of the acid as a pretreatment chemical. Because the City was concerned with secondary process impacts associated with acid elimination, additional measures were desired in order to protect the full-scale process. This thesis reports on the design, fabrication and installation of a third-stage two membrane element pressure vessel “canary” sentinel monitoring device (Canary), its effectiveness as an online scaling monitor during full-scale acid elimination, and presents the results of the study. The Canary sentinel device was controlled using the normalized specific flux of the two membrane elements fed by a portion of the second stage concentrate of one of the City’s full-scale RO process skids. Although the Canary demonstrated the ability to detect changes in an RO process operation, scaling did not occur under the conditions evaluated in this study. An autopsy of one iv of the Canary elements revealed that no scaling had occurred during the acid elimination process. Therefore, the Canary was found to be useful in its function as a sentinel, even though no scaling was detected by the device after acid elimination at the City’s full-scale plant had been accomplished.

Диссертация посвящена проблеме повышения конкурентоспособности компании путем использования новых управленческих технологий. Речь идет, в первую очередь, о внедрении в деятельность предприятия, работающего в сфере услуг, концепции бережливого производства. Данная концепция представляет собой набор конкретных методов и технологий, направленных на повышение конкурентоспособности предприятия за счет сокращения различного рода потерь как в системе производства, так и в системе потребления. Для повышения конкурентоспособности предлагается использовать неценовые методы конкуренции, а именно: повышение потребительской ценности в процессе обслуживания клиентов. Таким образом, завоевание конкурентного преимущества будет достигаться путем сервисной дифференциации. Для оптимизации деятельности предприятия были определены основные процессы, происходящие при обслуживании, и выбраны наиболее значимые с точки зрения конкурентных позиций, которые необходимо оптимизировать в первую очередь. Для каждого процесса был сформирован поток создания ценности, определены потери и их виды, а также разработаны мероприятия по снижению или исключению этих потерь. / The thesis is devoted to the problem of increasing the competitiveness of the company by using new management technologies. It is, first of all, the introduction of the concept of lean production in the activities of the enterprise operating in the service sector. This concept is a set of specific methods and technologies aimed at increasing the competitiveness of an enterprise by reducing various kinds of losses, both in the production system and in the consumption system. To increase competitiveness, it is proposed to use non-price methods of competition, namely, increase of consumer value in the process of customer service. Thus, the achievement of a competitive advantage will be achieved through service differentiation. To optimize the activities of the company, the main processes that took place during maintenance were identified, and the most significant ones were selected from the point of view of competitive positions, which should be optimized in the first place. For each process, a value stream was generated, losses and their types were identified, and measures were developed to reduce or eliminate these losses.

On the Russian market, the Ministry of Energy of the Russian Federation and a number of large companies that are monopolists or oligopolists in various markets and areas of activity within the fuel and energy sector, such as PJSC Gazprom, PJSC NK Rosneft, PJSC NOVATEK, are responsible for the development and operation of this sphere. The activities of these companies are focused on production, transportation and export deliveries, as well as the technological development of fuel and energy resources and methods of their application. However, the development of the fuel and energy complex is impossible without state support, namely, without the participation of the Council of the Federation of the Russian Federation, the President of the Russian Federation and the Ministry of Energy of the Russian Federation. State support contributes to the receipt of subsidies, financial loans and incentives to companies in the fuel and energy complex for the effective and active development of innovative technologies and improving the standard of living of society in various constituent entities of the Russian Federation. The most effective way to develop the fuel and energy complex and apply technologies in the country for its development and increase the level of well-being are state programs. The state program is an instrument of state regulation that ensures the achievement of long-term goals and objectives by using available resources and identifies companies whose participation will contribute to the favorable implementation of the program. In addition to the fact that the process of developing a state program is laborious, it should be noted that the implementation process is complex. It is necessary to develop an effective strategy for the development and implementation of government programs, focusing on the production capabilities of participating companies, given the relevance and need for the development and implementation of government programs for society. Mandatory factors should be consumer needs and desires, which should be guided and satisfied through the implementation of state programs. For their full satisfaction, it is necessary to systematize and organize the effective and appropriate performance of all functional participants in state programs, as well as provide the necessary resources for their favorable implementation. The best way to achieve the above aspects is to use a marketing and project approach in the management and implementation of government programs, the use of tools that help to take into account all the necessary parameters, an in-depth analysis of the market, a thorough analysis of consumers and their needs, development of an implementation strategy, determination of a development vector, and most importantly, developing an effective government program. / На российском рынке за развитие и функционирование данной сферы отвечает Министерство энергетики Российской Федерации и ряд крупных компаний являющихся монополистами или олигополистами на различных рынках и направлениях деятельности в рамках ТЭК, такие как ПАО «Газпром», ПАО «НК «Роснефть», ПАО «НОВАТЭК», ПАО «Россетти», ПАО «Лукойл» и другие. Деятельность данных компаний ориентирована на добычу, транспортировку и экспортные поставки, а также технологическое развитие топливно-энергетических ресурсов и способов их применения. Однако, развитие ТЭК невозможно без государственной поддержки, а именно без участия Совета федерации РФ, Президента РФ и Министерства энергетики РФ. Государственная поддержка способствует получению субсидий, финансовых займов и льгот компаниям топливно-энергетического комплекса для эффективного и активного развития инновационных технологий и повышения уровня жизни общества в разных субъектах Российской Федерации. Наиболее действенным способом развития топливно-энергетического комплекса и применения технологий в стране для ее развития и повышения уровня благосостояния, являются государственные программы. Государственная программа — это инструмент государственного регулирования, обеспечивающий достижение перспективных целей и задач путем использования имеющихся ресурсов и определяющий компании, участие которых будет способствовать благоприятной реализации программы. Помимо того, что процесс разработки государственной программы трудоемкий, необходимо отметить, что и процесс реализации сложный. Необходимо разработать эффективную стратегию по разработке и реализации государственных программ, ориентируясь на производственные возможности компаний-участников, учитывая актуальность и необходимость разработки и реализации государственных программ для общества. Обязательными факторами должны являться потребительские потребности и желания, на которые следует ориентироваться и удовлетворять их посредством реализации государственных программ. Для их полноценного удовлетворения необходимо систематизировать и организовать эффективную и целесообразную работоспособность всех функциональных участников государственных программ, а также обеспечивать необходимыми ресурсами для их благоприятной реализации. Наилучшим способом для достижения вышеупомянутых аспектов будет применение маркетингового и проектного подхода в управлении и реализации государственных программ, применение инструментов которых способствуют учету всех необходимых параметров, глубокому анализу рынка, тщательному анализу потребителей и их потребностей, разработке стратегии реализации, определения вектора развития и самое главное, разработке эффективной государственной программы.

Актуальность темы обусловлена потребностью организаций в оптимизации бизнес-процессов продвижения через сеть Интернет в сфере оптовой торговли. Целью выпускной квалификационной работы является разработка и внедрение нового функционала, оптимизирующего процесс продвижения на предприятии ООО «Мед-орто». Данные рекомендации применяются на практике, и будут способствовать поддержанию интереса покупателей к компании «Мед-Орто». Реализация проекта направлена на увеличение продаж, узнаваемости, формированию лояльных пользователей. / The relevance of the topic is due to the need for organizations to optimize the business processes of promotion via the Internet in the field of wholesale. The purpose of the final qualification work is the development and implementation of new functionality that optimizes the promotion process at the “Med-orto” enterprise. These recommendations are applied in practice and will help maintain the interest of buyers in “Med-orto”. The implementation of the project is aimed at increasing sales, recognition, and building loyal users.

The Architecture, Engineering, and Construction (AEC) industry is known to be overwhelmed with resource planning, risk management, and logistic challenges, resulting in design defects, project delivery delays, cost overruns, and contractual disputes. These challenges have instigated research in the application of advanced machine learning algorithms such as Deep learning (DL) to help with diagnostic and prescriptive analysis of causes and preventive measures. Construction 4.0 develops through continuous innovations towards digitalization and intelligence, in order to realize a considerable boost in automation, productivity, and reliability. The Digital Twins, as the next level of planning and process control and automation towards Construction 4.0, will incorporate cognitive features that enable sensing complex and unpredicted behavior and reason about dynamic strategies for process optimization to support decision-making. However, there is still a lack of awareness regarding the real impact of DT integration, DL, and IoT, all connected to self-learning hybrid models with proactive cognitive capabilities for smart planning and construction. This study investigates the potential integration of DT and DL to facilitate smart planning and construction through an explorative analysis to identify and close this gap. Data were collected from global industry experts in a mixed approach with interviews, focus groups, and a survey focusing on the applicability and interoperability of DL integrated DT with decision-support capabilities for process optimization. Based on the results of quantitative and qualitative analyses, a conceptual model of the framework has been developed. The evaluations support that the DL integrated DT model will incorporate cognitive abilities to detect complex and unpredictable actions and reasoning about dynamic process optimization strategies to support decision-making in smart planning and construction. / Pre-study for SPARK-SBE potential project

This dissertation describes the design and optimization of a CO2-capture unit using aqueous amines to remove of carbon dioxide from the flue gas of a coal-fired power plant. In particular we construct a monolithic model of a carbon capture unit and conduct a rigorous optimization to find the lowest solvent regeneration energy yet reported. Carbon capture is primarily motivated by environmental concerns. The goal of our work is to help make carbon capture and storage (CCS) a more efficient for the sort of universal deployment called for by the Intergovernmental Panel on Climate Change (IPCC) to stabilize anthropomorphic contributions to climate change, though there are commercial applications such as enhanced oil recovery (EOR). We employ the latest simulation tools from Aspen Tech to rigorously model, design, and optimize acid gas systems. We extend this modeling approach to leverage Aspen Plus in the .NET framework through Microsoft's Component Object Model (COM). Our work successfully increases the efficiency of acid gas capture. We report a result optimally implementing multiple energy-saving schemes to reach a thermal regeneration energy of 1.67 GJ/tonne. By contrast, the IPCC had reported that leading technologies range from 2.7 to 3.3 GJ/tonne in 2005. Our work has received significant endorsement for industrial implementation by the senior management from the world's second largest chemical corporation, Sinopec, as being the most efficient technology known today. / Ph. D.

Im Rahmen dieser Arbeit wurden verschiedene zweiphasige Vergärungssysteme hinsichtlich der mikrobiellen Biomasse und Abbauaktivität charakterisiert, mit dem Ziel, eine mikrobiologische Prozessüberwachung zu ermöglichen. Bei der analytischen Begleitung des Biogasprozesses stellte sich heraus, dass viele Biomasse- und Aktivitätsparameter anlagen- bzw. substratspezifische Werte aufweisen und Prozessstörungen bzw. Verfahrensmodifikationen über diese mikrobiologischen Kenngrößen detektiert und verifiziert werden können. Im Normalbetrieb der Vergärung von Maissilage konnte in der Hydrolysestufe eine starke Vermehrung der mikrobiellen Gesamtzellzahl sowie eine Zunahme des Archaea:Bacteria-Verhältnisses verzeichnet werden. Die Aktivitätsprofile von Hydrolasen (unspezifische Esterase, Polysaccharasen und Proteasen) erlaubten eine Visualisierung des Hydrolysefortschritts. Hierbei erwiesen sich die Esterase-, Cellulase- und Xylanaseaktivität als besonders aussagekräftig. Ähnlich ermöglichte dies die Analyse der Atmungsaktivität, die die mikrobielle Abbauaktivität des Eingangs- bzw. das Restgaspotential des Ausgangsmaterials der Hydrolysestufe wiedergibt. Die phylogenetischen Analysen der ersten Prozessstufe zeigten eine klare Dominanz von cellulolytischen Bakterien der Gattung Clostridium (Ø 35%). Der Anteil der hydrogenotrophen Methanogenen lag in den untersuchten Systemen etwa 50% über dem der Acetoklastischen, was darauf schließen lässt, dass der hydrogenotrophe Methanbildungsweg favorisiert wird. Es wurde aber auch eine erhöhte Abundanz der nicht-methanogenen Crenarchaeota festgestellt, deren Rolle im Biogasprozess noch ungeklärt ist. Im Zuge dieser Arbeit wurde weiterhin die Vergärbarkeit von HCH-belasteter Grassilage bzw. ein potentieller mikrobieller β-HCH-Abbau untersucht. Hier konnte gezeigt werden, dass die Aktivität der Mikroorganismen durch die Schadstoffbelastung des Substrates nicht inhibiert war. Darüber hinaus konnte ein Abbau des β-HCH nach der Hydrolyse der Grassilage nachgewiesen werden. Durch das Auftreten von Prozessstörungen bzw. Verfahrensmodifikationen konnten die Auswirkungen auf die untersuchten mikrobiologischen Kenngrößen näher untersucht und u. a. auch statistisch abgesichert verifiziert werden. Korrelationsanalysen verdeutlichten die mikrobiellen bzw. biochemischen Zusammenhänge im System. Besonders interessant sind dabei die signifikanten Korrelationen zwischen der Gesamtzellzahl, der Esteraseaktivität und dem Chemischen Sauerstoffbedarf, die für jede Verfahrensstufe nachgewiesen werden konnten. Diese Analysen zeigten erstmalig, dass die unspezifische Esteraseaktivität als allgemeiner mikrobieller Aktivitätsparameter in verschiedenen Prozessstufen von Biogasanlagen als Indikator zur Prozesseffizienz und -stabilität einsetzbar ist. Daher wurde die Methodik als Schnelltest weiterentwickelt, der auch vor Ort Anwendung finden kann. Dies ermöglicht eine direkte Analyse des Biogassubstrates, der Effizienz der Substratumsetzung sowie die Detektion von Störungen und eine entsprechende Steuerung und Regelung des Prozesses.

Esta tese descreve o desenvolvimento e implementação de um otimizador em tempo real da operação do conversor da unidade de craqueamento catalítico em leito fluidizado (FCC) da refinaria Henrique Lage localizada em São José dos Campos. É desenvolvida uma estratégia de otimização integrada ao controlador preditivo cuja função objetivo e restrições incorporam componentes dinâmicos e estáticos. Os problemas de controle multivariável e otimização econômica são resolvidos simultaneamente num mesmo algoritmo. É utilizado um modelo rigoroso do processo para determinar as condições econômicas ótimas do estado estacionário do conversor. Por intermédio do modelo dinâmico, obtido através de testes em degrau na planta, é determinada a melhor trajetória para conduzir o processo para o seu ponto de maior lucratividade, sem violar as suas restrições operacionais durante as transições. As variáveis controladas e manipuladas possuem restrições tanto no transiente como no estado estacionário. O problema de otimização não linear resultante é resolvido através de um algoritmo SQP. A nova estratégia de otimização forneceu excelentes resultados nas simulações com as condições normais de operação e as perturbações típicas da unidade. Na comparação desta estratégia com a convencional, cujas funções de controle e otimização estão separadas, a mesma mostrou um melhor desempenho por manter o processo mais estável. Na fase de implementação do otimizador, o controlador preditivo multivariável existente no conversor foi adaptado para a nova estrutura de otimização através da inclusão das funções de otimização que envolvem o modelo rigoroso do estado estacionário do processo. O controlador/otimizador foi inserido no software da Petrobras denominado SICON, o qual já era utilizado como plataforma de sintonia e manutenção do controlador multivariável linear do conversor. Esse software tem facilidades para desenvolvimento e implementação de estratégias de controle avançado. Neste trabalho são apresentados os aspectos mais importantes da integração do otimizador na estrutura de automação da refinaria e o seu comissionamento. Estão também relacionadas as principais dificuldades encontradas na implementação do otimizador e a forma que as mesmas foram solucionadas. Os resultados obtidos na planta mostram um bom desempenho do novo algoritmo tanto em relação aos benefícios econômicos como na estabilização da unidade. / This thesis describes the development and implementation of a real time optimizer of the operation of a fluid catalytic cracking (FCC) converter in the Henrique Lage refinery located in São José dos Campos. It is developed an optimization strategy integrated into the predictive controller whose objective function and constraints incorporate dynamic and static components. The multivariable control and the economic optimization problems are solved simultaneously by the same algorithm. A rigorous process model is used to determine the converter steady-state optimum economic operating conditions. By utilizing a dynamic model, obtained through step tests in the plant, calculations are carried out in order to determine the best path to drive the process to its more profitable operating point, without violating operational constraints during the transient modes. All controlled and manipulated variables are constrained, both in the steady-state and in the dynamic states. The resulting optimization problem is nonlinear and is solved by an SQP algorithm. The new optimization strategy has provided excellent results in the simulations performed at normal operating conditions and typical disturbances. Comparing to the conventional strategy, whose control and optimization functions are separated, the new one has shown a better performance by maintaining a smoother operation of the process. In the optimizer implementation phase, the existent predictive linear controller was adapted to the new optimization structure by including the optimization function that involves the rigorous steady-state model of the process. The optimizing controller was inserted in Petrobras SICON software, which was already being used as a tuning and maintenance platform of the linear multivariable controller of the converter. This software has nice features for the development and implementation of advanced process control strategies. In this work it is presented the more important aspects of the optimizer integration into the refinery automation structure and its commissioning. The main difficulties of the optimizer implementation and the way how they were solved are also related. Plant results show a good performance of the new algorithm in terms of economic benefits and unit stabilization.

Abstract Biomass is the most abundant renewable material present on Earth and has been widely used e.g. in energy production. Recently, new applications for biomass utilization have been developed, e.g. the use of biomass as a raw material for synthesizing new chemicals. This research aimed to produce activated carbon (AC) from waste wood-based materials and peat through carbonization followed by physical or chemical activation. Physical steam activation and chemical activation generate the porosity in AC after the carbonization. The desired properties of AC (porosity, pore size distribution, surface functionality) are dependent on the application in which AC is used. The first part of the research focused on setting up the carbonization and activation device. The most important variables affecting carbonization and activation and the AC properties were studied. The process parameters were optimized through the design of experiments (DOE). The results showed that in the physical activation, the most important variables affecting the characteristics of AC are the holding time, temperature, and the steam feed. Consequently, a model for tailoring the microporosity or mesoporosity of AC and maximizing the yield is proposed. The second part of the research focused on chemical activation using zinc chloride. The aim was to study the effect of activation variables on the yield and properties of AC. Finally, the use of AC as an adsorbent was studied. Especially, the applicability of birch sawdust based activated carbon on the removal of dyes, zinc metal, nitrate, phosphate, and sulfate ions was evaluated. Based on the results, a difference was shown between one and two step process for carbonization and activation, and a single-step process was suggested to maximize the quality of AC. / Tiivistelmä Biomassa on maapallon eniten saatavilla olevaa uusiutuvaa materiaalia, jota on hyödynnetty jo pitkään mm. energiantuotannossa. Viime aikoina uusia biomassan käyttökohteita on kehitetty laajalti, kuten esimerkiksi uusien kemikaalien valmistukseen. Tässä tutkimuksessa puupohjaista jätebiomassaa ja turvetta hyödynnetään fysikaalisesti ja kemiallisesti aktivoidun aktiivihiilen valmistuksessa. Fysikaalinen höyryaktivointi ja kemiallinen aktivointi lisäävät aktiivihiilen huokoisuutta hiilestyksen jälkeen. Aktiivihiilen halutut ominaisuudet (huokoskokojakauma, pinnan toiminnalliset ryhmät) määräytyvät käyttökohteen mukaan. Tutkimuksen ensimmäisessä vaiheessa keskityttiin hidas pyrolyysilaitteiston ja aktivointilaitteiston rakentamiseen sekä hiilestyksen ja aktivoinnin kannalta keskeisimpien muuttujien tutkimiseen. Prosessimuuttujien vaikutusten tarkastelussa ja optimoinnissa hyödynnettiin koesuunnitteluohjelmaa. Tulosten perusteella todettiin, että fysikaalisessa aktivoinnissa olennaisimmat muuttujat olivat lämpötila, pitoaika sekä höyrysyöttö. Tämän pohjalta esitettiin malli aktiivihiilen mikro- ja mesohuokoisuuden muokkaamiseksi ja saannon maksimoimiseksi. Tutkimuksen toisessa vaiheessa tutkittiin kemiallista aktivointia hyödyntämällä sinkkikloridia aktivointikemikaalina. Tavoitteena oli selvittää eri aktivointimuuttujien vaikutusta saantoon ja aktiivihiilen laatuun. Tutkimuksen viimeisessä vaiheessa tutkittiin valmistettujen aktiivihiilien käyttöä adsorbenttina. Erityisesti tutkittiin koivupurusta valmistetun aktiivihiilen soveltuvuutta väriaineiden, metallien ja anionien sidontaan. Tutkimuksen keskeisenä tuloksena voitiin osoittaa merkittävä ero yksi- ja kaksivaiheisen hiilestyksen ja aktivoinnin välillä, ja ehdotettiin yksivaiheista prosessia hiililaadun optimoimiseksi. / Sommario La biomassa è il materiale rinnovabile più abbondante presente sulla Terra ed è stata intensamente usata e.g. nella produzione di energia. Recentemente sono state sviluppate nuove applicazioni per la biomassa, ad esempio come materiale di base per sintetizzare nuovi prodotti chimici. Lo scopo di questa ricerca è produrre carbone attivo (CA) attraverso attivazione fisica e chimica da materiali legnosi di scarto come segatura, cippato e torba. L’attivazione fisica e l’attivazione chimica, creano la porosità nel CA dopo la carbonizzazione. Il prodotto finale può essere usato in differenti applicazioni in base a diversi fattori tra cui la distribuzione della porosità e la tipologia dei gruppi funzionali presenti sulla superficie. La prima fase della ricerca è stata dedicata alla progettazione e installazione dell’hardware necessario per l’attivazione e nell’individuazione dei parametri di processo più importanti. I parametri di processo sono stati ottimizzati attraverso il design of experiments (DOE) e sono state considerate le differenti variabili che interagiscono nella formazione del CA. I risultati hanno mostrato che i parametri di processo più importanti che influiscono sulle caratteristiche del CA sono il tempo, la temperatura di attivazione e la quantità di vapore iniettato nel reattore. È stato proposto un modello per progettare CA microporoso o mesoporoso con massa finale massimizzata. La seconda parte della ricerca è stata incentrata sull’attivazione chimica con cloruro di zinco. Lo scopo é stato studiare l’effetto delle variabili di attivazione su massa finale e proprietà del carbone attivo. Infine, è stata studiato il CA come adsorbente. In particolare è stata considerata l’applicabilità del CA da segatura di betulla per la rimozione di coloranti, zinco metallico, ioni di nitrato, fosfato e solfato. In base a questi risultati, una differenza é stata evidenziata tra il processo di carbonizzazione e attivazione a uno o due stadi, ed il processo a singolo stadio è stato proposto per massimizzare la qualità del CA.

La technique du tissage consiste à créer un entrecroisement de fils perpendiculaires entre eux. Pour cela, il est nécessaire d'insérer un fil de trame à travers une nappe de fils de chaîne parallèles. L'étape de formation de la foule, consistant à séparer la nappe de chaîne pour libérer un espace d'insertion, est vecteur d'interactions interfilamentaires et de dommages induits dans la structure filamentaire. Un tel phénomène, rapporté au tissage de renforts de matériaux composites produit des dégradations de structure importantes et une diminution sensible des propriétés mécaniques du produit fini. Dans le contexte de la croissance du marché des matériaux composites haute performance à renforts tissés, il est nécessaire d'améliorer puis de maîtriser le procédé de tissage. Ainsi, pour optimiser le tissage d'étoffes multicouches à haute densité, nous disposons d’une machine Jacquard. Il s'agit d'une technique qui permet un pilotage individuel motorisé des fils de chaîne et qui offre des paramètres de foule particuliers. Le but de ces travaux sont d'étudier ces paramètres d'une part et de définir et analyser leurs effets sur le processus de tissage par ailleurs. Nous utilisons pour ces travaux du polyester multifilamentaire, ainsi qu'un dispositif de tissage particulier adapté au tissage technique multicouches. Nous constatons que le tissage multicouches de forte densité génère de nombreux frottements interfilamentaires qui dégradent les fils en provoquant de la fibrillation. L'observation de l'évolution de ce phénomène selon les différents paramètres Jacquard, permet tout d'abord de mieux le comprendre et le cerner. Elle permet ensuite de déterminer les configurations de tissage optimales pour assurer la qualité du tissage de renforts tissés. / Weaving basic structure is an orthogonally interlaced yarns plane, produced thanks to weft insertion across parallel warp yarns. Shedding is a major step for shed generation by warp yarns separation. Shedding may generate warp yarns interactions and yarn structure degradations because of density. Such a phenomenon becomes major with composite high density woven reinforcement where degradations and final product mechanical properties loss may become considerable. With high performance composites market growth, weaving process needs to be improved.A Jacquard shedding mechanism has been employed for high density multilayer woven fabric weaving optimization, as this technique enables warp yarns individual motorized driving with very particular shedding parameters. In this research, Jacquard shedding parameters have been studied so that their effects on the weaving process may be brought to light, with a specific weaving machine dedicated to multilayer weaving, where polyester multifilament yarns are used.It has been observed that high density multilayer weaving produces friction and many degradations during shedding between filaments because of the fibrillation phenomenon. Fibrillation has been examined and understood thanks to the observation of its evolution according to Jacquard shedding parameters. It has been the basis for optimal weaving parameter configurations which may be used for woven reinforcements composites quality improvement.