Relevant bibliographies by topics / Filtration – sang

Academic literature on the topic 'Filtration – sang'

Author: Grafiati
Published: 7 July 2024
Last updated: 7 July 2024

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Journal articles on the topic "Filtration – sang":

1

Marpaux, Nadine, Christian Naegelen, Stéphane Bégué, and Pascal Morel. "Sang total déleucocyté : premiers résultats de la filtration." Transfusion Clinique et Biologique 26, no. 3 (September 2019): S4. http://dx.doi.org/10.1016/j.tracli.2019.06.243.

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Bocchi, S., B. Olivier, F. Roubinet, D. Radulovic, and A. Verheyde. "Utilisation en routine du dispositif quadruple pour filtration de sang total Macopharma référence FQE6283LA." Transfusion Clinique et Biologique 20, no. 3 (June 2013): 330. http://dx.doi.org/10.1016/j.tracli.2013.03.137.

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Legrand, D., V. Ferrera, C. Dufour, F. Donnadieu, and P. De Micco. "P4-9 Qualité du PFC issu de la filtration du sang total par le dispositif Baxter." Transfusion Clinique et Biologique 5 (April 1998): 80s. http://dx.doi.org/10.1016/s1246-7820(98)80071-2.

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Boeri, N., C. Pereira, A. François, and N. Sansonetti. "P17-12 Filtration intégrée du sang total: influence du débit et de la température sur la déleucocytation." Transfusion Clinique et Biologique 5 (April 1998): 170s. http://dx.doi.org/10.1016/s1246-7820(98)80266-8.

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Lorenzo, Hans-Kristian, and Jean-Jacques Candelier. "Syndrome néphrotique idiopathique et facteurs circulants." médecine/sciences 35, no. 8-9 (August 2019): 659–66. http://dx.doi.org/10.1051/medsci/2019128.

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La fonction d’excrétion du rein fait intervenir des glomérules chargés de filtrer sélectivement le sang. L’acteur principal du filtre glomérulaire est le podocyte dont les pédicelles entrelacés portent des complexes moléculaires (néphrine, podocine, etc.) qui sont responsables du fonctionnement de la barrière de filtration (diaphragme de fente). Des altérations de ces podocytes entraînent une protéinurie massive qui caractérise le syndrome néphrotique. Parmi les formes les plus malignes de cette pathologie, se trouve le syndrome néphrotique idiopathique dont la physiopathologie reste inconnue. Ce syndrome regroupe essentiellement deux entités : les lésions glomérulaires minimes et la hyalinose segmentaire et focale. Ces pathologies impliqueraient les cellules du système immunitaire et plusieurs facteurs de perméabilité circulants qui agiraient sur la morphologie et le fonctionnement des podocytes.
6

Ouldamar, K. "Y a-t-il des paramètres hématologiques ou immuno-hématologiques associés aux donneurs de sang portant le trait drépanocytaire (AS) présentant des anomalies de filtration des poches de sang." Transfusion Clinique et Biologique 22, no. 4 (September 2015): 217. http://dx.doi.org/10.1016/j.tracli.2015.06.012.

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Janus, G., T. Samson, R. Faudon, C. Renaudeau, M. Joussemet, and G. Fabre. "Conséquences sur les PSL de la déleucocytation par filtration du sang total avec le filtre intégré Leucoflex® LST1." Transfusion Clinique et Biologique 4, no. 6 (December 1997): 549–57. http://dx.doi.org/10.1016/s1246-7820(97)80080-8.

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Ferrao, Ranjana. "Digital Technology and Copyright Protection the Challenges of Indian Performers Rights Society." International Journal of Membrane Science and Technology 10, no. 4 (September 19, 2023): 2408–12. http://dx.doi.org/10.15379/ijmst.v10i4.3505.

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Indian music is ever-green. Every restaurant, pub. Airports, stadium, television etc plays them making them world famous. India has 465 FM Radio stations which constantly play Indian Bollywood music. Though the song becomes well known the singer who sang the song is not recognized nor does he or she receive sufficient compensation for the song. The artist in India is the one who works so hard but ends up getting nothing. The ‘Indian Copyright law was amended in 2012’ to acknowledge the rights of performers. The singers were recognized as performers. The law provided for royalty to be paid to the singers. In reality this royalty never reached the singers. The problem for the singer was identifying the user playing his song and the problem for a genuine user was identifying the location of the singer to pay the royalty directly to him. Therefore, there was a need for an independent body to administer the copyright and collect royalty. ISRA is the bridge between the singer and the user which helps in collecting royalty. This article discusses the issues faced by the singers and the need to develop a smother collective administration of copyright.
9

Carlo, P. L., L. P. Owens, G. P. Hanna, and K. E. Longley. "The Removal of Selenium from Water by Slow Sand Filtration." Water Science and Technology 26, no. 9-11 (November 1, 1992): 2137–40. http://dx.doi.org/10.2166/wst.1992.0680.

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The feasibility of selenium removal from drainage water by slow sand filtration (SSF) was investigated. Two anaerobic laboratory-scale slow sand filters, operated in parallel, received synthetic feed solution. Selenate reduction and subsequent selenium removal were monitored during five experimental filtrations. The results suggest that selenium removal occurred by the dissimilatory reduction of selenate to elemental selenium. This reduction was independent of sulfate. Selenium removal efficiencies were governed by the hydraulic loading rate (HLR).
10

Oesterholt, F. I. H. M., and B. A. Bult. "Improving Municipal Waste Water Quality by Effluent Polishing: A Pilot Scale Experiment at Winterswijk, The Netherlands." Water Science and Technology 27, no. 5-6 (March 1, 1993): 277–86. http://dx.doi.org/10.2166/wst.1993.0507.

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Over a period of three months two filtration methods, i.e. cross flow microfiltration and continuous sand filtrations were tested for their capacity to improve the quality of the effluent from a waste water treatment plant. The removal capacity of both methods was explored for suspended solids, COD, Kjeldahl nitrogen phosphorus, copper and zinc with and without iron flocculation. Without iron flocculation only the suspended solids can be removed. Iron has to be added prior to removal so that suspended solids and phosphorus can be removed in sufficient quantities. In that case, total P can be removed for 70% by means of continuous sand filtration, and for 90 % when microfiltration is being applied. The removal of COD, nitrogen Kjeldahl, copper and zinc is confined to 10 or 20%. From a technical point of view, microfiltration is preferred because of its high removal efficiency for all the components. On the other hand, from a financial point of view, microfiltration is not feasible. Treatment costs for sand filtration and microfiltration are calculated at f 0.15 and f 2.07 respectively per m3 water treated.
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Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "Filtration – sang":

1

Belhadj, Mohamed. "Vers une modélisation mathématique de la filtration des globules blancs du sang." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00011977.

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Cette thèse concerne l'étude de modèles mathématiques et méthodes numériques motivés par la filtration des globules blancs du sang.

Dans la première partie, nous définissons des modèles mathématiques qui réprésentent les principaux phénomènes physiques qui entrent en jeu dans le procédé de la filtration.

La deuxième partie est dédiée à l'analyse mathématique de systèmes d'équations aux dérivées partielles modélisant le procédé de la filtration. Tout d'abord, nous considérons un système d'équations semi-linéaires de type hyperbolique-parabolique avec une diffusion anisotrope dégénérée. Nous étudions ce problème avec une théorie $L^{1}$; nous considérons en particulier l'existence et l'unicité de solutions faibles ainsi que d'autres propriétés comme le principe du maximum; puis nous établissons la limite quand la constante de réaction devient grande. Nous montrons que le système converge vers une équation non linéaire parabolique-hyperbolique qui généralise le problème de Stefan. Nous étudions également, par des techniques de l'homogénéisation, la filtration au travers de milieux poreux fibrés. Le réseau des fibres étudié est celui utilisé par M. Briane dans le cadre d'une étude sur la conduction thermique des tissus biologiques. Nous dérivons et justifions l'équation de Darcy ainsi que la forme du tenseur de perméabilité pour un tel milieu fibreux. Les résultats théoriques concernant la perméabilité sont illustrés par quelques simulations numériques. Finalement, nous considérons le cas où le diamètre des fibres tend vers zéro. En appliquant des résultats de G. Allaire à notre cas, nous justifions rigoureusement la forme du terme dominant dans les formules de perméabilité efficace utilisées en ingénierie. Ces résultats sont également confirmés par un calcul numérique direct de la perméabilité, dans lequel la petitesse du diamètre des fibres rend nécessaire le recours à des approximations de précision élevée.

La définition des méthodes numériques efficaces pour approximer la solution des modèles mathématiques est envisagée dans la troisième partie. Précisément, concernant les équations de Darcy, nous avons utilisé la méthode des éléments finis mixtes hybrides. Pour la résolution de l'équation du transport, nous avons implémenté une méthode numérique utilisant des volumes finis pour la discrétisation du terme convection/réaction associé à une approximation mixte hybride pour la discrétisation du terme dispersif.
2

Barbe, Laurent. "Mécanismes d'adhérence des leucocytes aux fibres synthétiques : application à la filtration du sang." Paris 7, 2001. https://tel.archives-ouvertes.fr/tel-00002228.

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GUIMBRETIERE, JEAN-FRANCOIS. "Etude hemorheologique clinique de 65 syndromes inflammatoires explores par bilan biologique standard et test de filtration de sang total." Nantes, 1989. http://www.theses.fr/1989NANT080M.

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4

Philp, Jane. "Etude de l'hémolyse et de l'absorption des protéines plasmatiques en plasmaphérèse membranaire à débit constant et pulsé." Compiègne, 1993. http://www.theses.fr/1993COMPD658.

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Cette thèse est consacrée à l'étude des problèmes posés par la plasmaphérèse membranaire et plus spécialement ceux de l'hémolyse et du colmatage de la membrane. Un des objectifs était de déterminer les causes de l'hémolyse lors de la filtration et dans quelle mesure la conception du module peut affecter le degré d'hémolyse produite. Cette thèse a montré que l'on pouvait réduire l'hémolyse en réduisant la longueur du filtre car cela réduit à la fois la pression transmembranaire et le temps de résidence du sang près de la membrane. L'adsorption des protéines par la membrane a été également étudiée. On trouve que cette adsorption est importante mais qu'elle peut être réduite en alimentant le filtre par un débit pulsé. La filtration extra liminale de l'extérieur vers l'intérieur des fibres a été également étudiée sur des prototypes spéciaux à peau externe. Dans le cas de la plasmaphérèse, ce procédé est moins intéressant car il réduit le flux de filtration et augmente l'hémolyse. Enfin, l'adaptation de notre système de filtration par débit pulsé à un moniteur de plasmaphérèse comportant une pompe sur le circuit de perméat a été réalisée et testée in vitro avec du sang bovin
This thesis has focused on the problems encountered during membrane plasmapheresis. These are specifically the causes of haemolysis and flux decline during membrane separations. The objective was to find what causes haemolysis in a filtering system and how the design of a module may affect the overall haemolysis. This thesis shows that haemolysis is due to the pressure gradient across the membrane and that by reducing fibber length the potential for haemolysis is reduced. The adsorption of plasma proteins onto the membrane surface was also investigated. It was shown that during steady blood flow conditions high levels of adsorption or trapping occurred and by introducing flow pulsations this level maybe minimised. A comparison between blood flow inside and outside the fibbers was made with respect to both filtration and haemolysis performances. It was found that with blood flow inside the fibbers haemolysis was lowest and filtration was highest. Having considered these factors a system of control was tested in vitro using bovine blood and flow pulsations. The system yielded a high filtration with very low haemolysis levels
5

Pellet, Charlotte. "Nouvelles fonctionnalités de copolymères en brosse dans les suspensions minérales concentrées." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066699/document.

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La thèse porte sur une nouvelle classe de polymères à architecture en brosse, synthétisés à l'échelle industrielle et utilisés comme additifs dans les suspensions colloïdales pour le couchage du papier. Le polymère en brosse contrôle la déshydratation et le séchage des suspensions ce qui permet d'obtenir des revêtements d'une qualité incomparable. L'objectif est de modéliser sur un plan fondamental le rôle fonctionnel des polymères en relation avec les performances en application. Dans une première partie nous étudions leurs propriétés physicochimiques, structurales et rhéologiques en solution en discutant les spécificités dues à l'architecture en brosse. Dans une seconde partie nous analysons à l'aide d'un dispositif expérimental original les propriétés de rétention d'eau apportées par les polymères. Dans une troisième partie nous étudions le séchage de suspensions de carbonate de calcium sur des substrats solides, qui conduit en général à des motifs hétérogènes dits en " anneau de café ". Nous avons découvert que les polymères en brosse à très faible concentration suppriment ces défauts de séchage de façon remarquable. Le nouveau mécanisme physique à l'¿uvre, que nous appelons effet Marangoni auto-induit, résulte des propriétés interfaciales des polymères et de leurs interactions spécifiques avec les particules de carbonate de calcium. Pour conclure nous établissons un lien entre les propriétés de rétention d'eau et l'inhibition des défauts de séchage. Nous démontrons alors le caractère générique de nos résultats en les transposant à une suspension biologique, le sang, où les polymères pourraient présenter un intérêt dans le traitement de pathologies cardiovasculaires
This work focuses on a new class of bottlebrush polymers, synthesized on an industrial scale and used as additives in colloidal suspensions for paper coatings. The bottlebrush polymer controls the dehydration and drying of the suspensions, and leads to coatings of outstanding quality. Our aim is to model the functional role of these polymers from a fundamental perspective in relation with applicative performances. In a first part we study their physicochemical, structural and rheological properties in solution, emphasizing the specificities due to the brush architecture. In a second part we implement an original experimental setup to analyze the water retention properties brought by the polymers. In a third part we study the drying of calcium carbonate suspensions on solid substrates, which in general forms to heterogeneous patterns called “coffee-rings”. We discovered that at very low concentration, bottlebrush polymers remarkably suppress these defects. We call auto-induced Marangoni effect the new physical mechanism at work. It results from the interfacial properties of the polymers and their specific interactions with calcium carbonate particles. To conclude, we establish a link between water retention properties and drying defect inhibition. We demonstrate the generic character of our results which can be transposed to a biological suspension, blood, where these polymers could be of interest for cardiovascular disease treatment
6

Sagot, Matthieu. "Détection électrique In-Situ des événements de microfiltration dans des milieux complexes." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSEP028.

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La microfiltration constitue un domaine scientifique et technologique bien documenté, mais qui nécessite encore des recherches approfondies lorsqu'il s'agit de cibler la filtration spécifique et précise d'éléments rares au sein d'un milieu complexe. En effet, des solutions innovantes pour le filtrage d'échantillons dans des milieux complexes pourraient être la clé de multiples problématiques liées à la santé et à l'environnement. Le sang est un exemple concret de milieu complexe : il contient une quantité importante et variée de cellules et de protéines, présentant une viscosité trois à huit fois supérieure à celle de l'eau, ainsi qu'un comportement non newtonien en écoulement. Les applications cliniques de la filtration sanguine nécessitent le traitement de grands volumes de sang, soit en raison de la rareté des éléments ciblés (dans le cas de la capture des cellules tumorales circulantes, la pertinence clinique commence à 5 CTC/mL de sang), soit parce que l'ensemble du sang circulant doit être purgé d'entités indésirables (telles que des agrégats cellulaires ou des microparticules circulantes dans les maladies cardiovasculaires et les accidents vasculaires cérébraux). Enfin, la nature biologique des éléments ciblés peut introduire une variabilité dans leur taille et leur forme, posant ainsi des défis fluidiques pour leur récupération au sein de tels milieux.La filtration sanguine est un processus central dans l'hémodialyse, la surveillance des maladies cardiovasculaires et les applications de biopsie liquide basées sur la capture sélective des cellules tumorales circulantes (CTC), entre autres contextes cliniques. Pour de telles applications, la micro et nano fabrication utilisant des méthodes et des techniques de précision de l'industrie des semi-conducteurs offre la possibilité de contrôler avec une grande précision la taille des pores de filtration par rapport à la taille des éléments ciblés nécessitant une filtration. Ce niveau de précision dans le processus de fabrication ouvre la voie à la rétention exclusive de l'élément ciblé, conduisant à l'information biologique dans le cas d'une application diagnostique, ou à la pathogénicité dans le cas d'applications thérapeutiques, sans altérer la composition du sang élué. Cependant, en raison du traitement d'un grand volume de sang et de la présence de millions de globules blancs et de milliards de globules rouges par millilitre de sang, de tels filtres microfabriqués sont sujets à l'obstruction due à l'accumulation de matériau retenue au fil du temps. Ce désavantage incite au développement d'une méthode in-situ capable de détecter la densité cellulaire à la surface de ces filtres pendant leur utilisation, afin de surveiller leur saturation en vue de nettoyer leur surface ou de procéder à leur remplacement par d’autres filtres. Dans ce contexte, nous proposons des dispositifs microfabriqués en salle blanche capables de répondre à ces exigences. Les dispositifs de détection produits combinent une membrane de filtration avec une méthode de détection cellulaire électrique in-situ à travers des microélectrodes interdigités et des mesures de spectroscopie d'impédance. Malgré l'utilisation de pores de filtration à l'échelle du micron et de dispositifs microfabriqués, nous proposons un design spécifique permettant la filtration sanguine à un débit élevé (11,5 mL/min), bien supérieur à celui des dispositifs microfluidique habituels. Enfin, nous démontrons que des mesures électriques stables peuvent être réalisées dans du sang entier à des débits élevés pour surveiller la saturation du filtre par les cellules retenues. De plus, l'analyse fine des cellules capturées, habituellement confiée à des laboratoires externes, pourrait être transférée au chevet du patient tout au long du traitement des échantillons, si une analyse in-situ et une phénotypisation en temps réel des cellules collectées par leur signature électrique pouvaient être démontrées
Microfiltration is a well-documented scientific and technological domain that still requires research when targeting the specific and accurate filtration of rare elements inside a complex medium. Indeed, innovative solutions for sample filtering of complex media may hold the key to multiple health-related and environmental issues and applications. Blood is a good example of a complex medium: it contains a large quantity and variety of cells and proteins and exhibits a viscosity three to eight times greater than water and non-Newtonian behavior when flowing. Clinical applications of blood filtration require processing large volume of blood either because of the scarcity of the targeted elements (in the case of circulating tumor cell capture, clinical relevance starts at 5 CTCs/mL of blood) or because the whole circulating blood needs to be expurgated from some adverse entities (such as cell aggregates or circulating microparticles in stroke and cardiovascular diseases). Finally, the biological nature of the targeted elements may introduce variability in the targeted element size and shape, therefore bringing fluidic challenges for their retrieval within such media. Blood filtration is a process which is central in hemodialysis, cardiovascular disease monitoring, and liquid biopsy applications based on the selective capture of Circulating Tumor Cells (CTCs), among other clinical contexts. For such applications, micro and nanofabrication using methods and techniques used today in advanced semi-conductor industry, brings the ability to control with great accuracy the size of the filtering pores with respect to the size of the targeted elements that require filtration. This level of accuracy in the fabrication process opens the opportunity to retain only the targeted element driving the biological information in the case of a diagnosis application or driving the pathogenicity in the case of therapeutic applications without impairing the composition of the eluted blood. However, because a large volume of blood is processed and due to the presence of millions of white blood cells (WBC) and billions of red blood cells (RBC) per milliliter of blood, such advanced microfabricated filters are subjected to clogging due to the unwanted accumulation of material unavoidably retained among time. This drawback appeals to the development of an in-situ method capable of sensing the cell density at the surface of these filters during use, to monitor their saturation in order to clean their surface or to proceed to their replacement by fresh ones. In this context, we propose clean room microfabricated devices capable of fulfilling these requirements. The produced sensing devices combine a filtering membrane with an in situ cellular electrical detection method through interdigitated microelectrodes and impedance spectroscopy measurements. Despite using micron-scale filtering pores and microfabricated devices, we propose a specific design that enables blood filtration at a high flow rate (11.5 mL/min), which is much larger than usual microfluidic devices. Finally, we demonstrate that stable electrical measurements can be performed in whole blood at high flow rates to monitor the saturation of the filter by retained cells. Moreover, the fine analysis of the captured cells, usually entrusted to remote laboratories, could be transferred at the patient’s bedside along the sample processing if an in-situ analysis and real-time phenotyping of the collected cells through their electrical signature could be demonstrated. This aspect will be addressed through the conception and fabrication of dedicated filtering devices, thus broadening the application field of electrical sensing on a filtering membrane within a microfluidic chip
7

Hasan, Faisal S. "Upflow sand-roughing filtration." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/34972.

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Slow sand filtration requires low turbidity water for effective operation. In most cases this means pretreating the raw water to reduce its turbidity. Lately horizontal gravel filters have become very popular as a means of pretreatment. They are simple to operate, have a large mass storage capacity, and can cope with high turbidity shock loads. However, cleaning them can be a problem. An alternative pretreatment, which this study is concerned with, is upflow sand roughing filtration. It has the potential advantages of simple design, ease of operation and cleaning, and low area requirements. A study of upflow versus downflow was done using two small filter columns. The results showed that although downflow exhibited a better turbidity removal than upflow, upflow allowed longer filter runs and better utilisation of bed depth. This was in agreement with earlier findings. The effect of backwash water quality was also investigated. Both filters were run in upflow direction; one was washed with tap water, the other with polluted raw water. The results suggested, unexpectedly, that a filter washed repeatedly with polluted water produced slightly better turbidity removal than one washed with tap water. This indicated some form of maturation, which could be biological in nature, taking place. Experiments with horizontal gravel filters clearly showed the importance of biological mechanisms in maturation. Four new filter columns, 50mm in diameter, were constructed. These allowed further investigation of the effect of bed depth. Backwash rate and duration were investigated to find an optimum. Very little of the wash water was required to clean the filters, the majority being required to flush the turbidity out of the system. The long-term effect of backwash on filters was investigated, as was the effect of wash water quality. Tap water, raw water and raw water polluted with settled sewage were used to wash the filters. The results indicated that the filters washed with raw water and polluted water proved to be as good as regards turbidity removal as those washed with tap water. This suggested that raw water backwash could be used effectively for washing upflow roughing filters.
8

Dorea, Caetano Chang. "Chemically-enhanced gravel pre-filtration for slow sand filtration." Thesis, University of Surrey, 2005. http://epubs.surrey.ac.uk/843007/.

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The simple operational and maintenance requirements of slow sand filtration (SSF), coupled with its high biological treatment efficiency makes it an attractive technology. The main limitation of SSF is its vulnerability to high suspended solids loadings. Pre-treatment in such instances can be achieved by gravel filtration. Cases of gravel pre-filtration underperformance have been attributed to significant fractions of influent suspended particles in the colloidal range. Maximum limits of turbidity for the application of gravel pre-filters have also been suggested. A simple intervention to overcome such water quality constraints can be through the dosing of a coagulant (aluminium sulfate) upstream of the pre-filtration stage; enhancing the pre-treatment efficiency, in what could be defined as direct (gravel) filtration. Previous studies have investigated its use as a pre-treatment for SSF; however, the results emphasise pre-filtration treatment efficiency and do not consider the effectiveness of the pre-treatment in protecting the slow sand filters. Also, because of the potential toxic effects of A1 residuals, its upstream use in relation to a biological SSF treatment has never been properly evaluated. The objectives of this study were: assess the efficiency as well as the effectiveness of chemically- enhanced up-flow gravel filters in series (UGFS) as pre-treatment for SSF and study the impact of aluminium residuals on the treatment performance and potential effects on biological activity. Preliminary experiments and first set of runs with chemically-enhanced pre-filter showed evidence of wall-effects due to the media size/column diameter ratio. This experimental design shortcoming was thought not to have affected the overall trends of results and was addressed for the set of pilot-experiments on which most conclusions are based. The results from the experimental work have shown that chemically-enhanced gravel pre-filtration can be effective only if coagulant dose is carefully controlled. Contrary to previous research, it was found that when resorting to chemically-enhanced pre-treatment (with alum) turbidities of less than 2 NTU (nephelometric turbidity units) should be targeted for in order to ensure an efficient and effective SSF pre-treatment. Such control will minimise A1 residuals that can otherwise cause a premature blockage of the slow sand filter by A1 hydroxide precipitates even with influent turbidities below 10 NTU. This was speculated to occur possibly due to size and mechanical properties of deposits retained on the uppermost layers of the SSF beds. A1 speciation analyses revealed that A1 residuals from chemically-enhanced pre-filtration were found to be mostly of inorganically- bound Al. This fraction consisted mainly of A1 in its form which is considered to be potentially more bioavailable (and possibly toxic) to aquatic (micro)organisms. However, slow sand filtration column trials found that filters dosed with the potentially more labile form of A1 did not show any significant difference in terms of treatment performance parameters and biological activity indicators. It has been demonstrated that chemically-enhanced pre-filtration (with alum) may not be an effective pre-treatment on the basis that it may cause an early blockage of the slow sand filters. There was no evidence of effect of A1 on biological treatment of the slow sand filtration process.
9

Pellet, Charlotte. "Nouvelles fonctionnalités de copolymères en brosse dans les suspensions minérales concentrées." Electronic Thesis or Diss., Paris 6, 2015. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2015PA066699.pdf.

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La thèse porte sur une nouvelle classe de polymères à architecture en brosse, synthétisés à l'échelle industrielle et utilisés comme additifs dans les suspensions colloïdales pour le couchage du papier. Le polymère en brosse contrôle la déshydratation et le séchage des suspensions ce qui permet d'obtenir des revêtements d'une qualité incomparable. L'objectif est de modéliser sur un plan fondamental le rôle fonctionnel des polymères en relation avec les performances en application. Dans une première partie nous étudions leurs propriétés physicochimiques, structurales et rhéologiques en solution en discutant les spécificités dues à l'architecture en brosse. Dans une seconde partie nous analysons à l'aide d'un dispositif expérimental original les propriétés de rétention d'eau apportées par les polymères. Dans une troisième partie nous étudions le séchage de suspensions de carbonate de calcium sur des substrats solides, qui conduit en général à des motifs hétérogènes dits en " anneau de café ". Nous avons découvert que les polymères en brosse à très faible concentration suppriment ces défauts de séchage de façon remarquable. Le nouveau mécanisme physique à l'¿uvre, que nous appelons effet Marangoni auto-induit, résulte des propriétés interfaciales des polymères et de leurs interactions spécifiques avec les particules de carbonate de calcium. Pour conclure nous établissons un lien entre les propriétés de rétention d'eau et l'inhibition des défauts de séchage. Nous démontrons alors le caractère générique de nos résultats en les transposant à une suspension biologique, le sang, où les polymères pourraient présenter un intérêt dans le traitement de pathologies cardiovasculaires
This work focuses on a new class of bottlebrush polymers, synthesized on an industrial scale and used as additives in colloidal suspensions for paper coatings. The bottlebrush polymer controls the dehydration and drying of the suspensions, and leads to coatings of outstanding quality. Our aim is to model the functional role of these polymers from a fundamental perspective in relation with applicative performances. In a first part we study their physicochemical, structural and rheological properties in solution, emphasizing the specificities due to the brush architecture. In a second part we implement an original experimental setup to analyze the water retention properties brought by the polymers. In a third part we study the drying of calcium carbonate suspensions on solid substrates, which in general forms to heterogeneous patterns called “coffee-rings”. We discovered that at very low concentration, bottlebrush polymers remarkably suppress these defects. We call auto-induced Marangoni effect the new physical mechanism at work. It results from the interfacial properties of the polymers and their specific interactions with calcium carbonate particles. To conclude, we establish a link between water retention properties and drying defect inhibition. We demonstrate the generic character of our results which can be transposed to a biological suspension, blood, where these polymers could be of interest for cardiovascular disease treatment
10

Queguiner, Christophe. "Modélisation de l'écoulement d'une capsule dans un pore cylindrique." Compiègne, 1995. http://www.theses.fr/1995COMP0864.

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Une méthode intégrale de frontière est utilisée pour modéliser l'écoulement instationnaire de capsules dans des pores. Une configuration entièrement axisymétrique est considérée où la capsule et le pore ont le même axe de révolution. La conduite est un cylindre avec une entrée et une sortie hyperboliques. La capsule a une géométrie de référence discoïdale et est remplie avec un liquide newtonien enfermé par une membrane très mince avec des propriétés élastiques néo-Hookéenne ou incompressible en surface. Les mouvements du liquide interne à la capsule et du fluide suspendant sont gouvernés par les équations de Stokes exprimées comme des intégrales de frontières. Celles-ci sont résolues par une technique de collocation, où des points sont distribués sur la membrane de la capsule, sur les parois de la conduite et sur les sections d'entrée et de sortie du domaine d'écoulement. La mécanique de l'interface de la capsule suit la théorie des grandes déformations des membranes élastiques. Le modèle numérique utilise un schéma temporel explicite où la position et la déformation de la capsule sont calculées à chaque pas de temps. Le modèle permet d'étudier l'effet de paramètres intrinsèques à l'écoulement (taille et géométrie de la capsule, propriétés élastiques de la membrane). La longueur d'entrée dans le pore, la perte de charge additionnelle à l'équilibre et les formes déformées de la capsule sont déterminées. De nouveaux résultats sont alors obtenus : le processus d'entrée d'une capsule dans un pore n'est pas sensible aux conditions en amont de l'écoulement; la longueur de pore nécessaire pour atteindre des conditions stationnaires, dépend de la taille de la capsule et du comportement de membrane. L'éclatement de capsules avec une membrane néo-Hookéenne a été observé. Il est dû à un phénomène d'élongation continue.
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Books on the topic "Filtration – sang":

1

S, Logsdon Gary, and American Society of Civil Engineers. Task Committee on Slow Sand Filtration., eds. Slow sand filtration: A report. New York, N.Y: The Society, 1991.

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Logsdon, Gary S. Water filtration practices: Including slow sand filters and precoat filtration. Denver: American Water Works Association, 2008.

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Canadian Society of Civil Engineers., ed. Sand filtration of public water supplies. [Montréal?: s.n., 1991.

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Bellamy, William D. Filtration of giardia cysts and other substances: Volume 2, slow sand filtration. Cincinnati, OH: U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1985.

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Bellamy, William D. Filtration of giardia cysts and other substances: Volume 2, slow sand filtration. Cincinnati, OH: U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1985.

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Rolf, Gimbel, Collins M. Robin, and Graham, N. J. D. 1953-, eds. Recent progress in slow sand and alternative biofiltration processes. London: IWA Pub., 2006.

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Graham, N. J. D. 1953-, ed. Slow sand filtration: Recent developments in water treatment technology. Chichester: Ellis Horwood, 1988.

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Graham, N. J. D. 1953- and Collins M. Robin, eds. Advances in slow sand and alternative biological filtration. Chichester: John Wiley, 1996.

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R, Collins M., Graham M. J. D, and American Water Works Association, eds. Slow sand filtration: And international compilation or recent scientificand operational developments. Denver: American Water Works Association, 1994.

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Robin, Collins M., Graham M. J. D, and American Water Works Association, eds. Slow sand filtration: And international compilation or recent scientific and operational developments. Denver: American Water Works Association, 1994.

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Book chapters on the topic "Filtration – sang":

1

Bartel, Hartmut, and Gesche Grützmacher. "Elimination of Microcystins by Slow Sand Filtration at the UBA Experimental Field." In Riverbank Filtration: Understanding Contaminant Biogeochemistry and Pathogen Removal, 123–33. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0479-4_6.

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Rabin, Richard L., Jaehong Han, and Douglas J. Rhee. "Ab-Interno Trabeculotomy." In Minimally Invasive Glaucoma Surgery, 41–57. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5632-6_4.

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Abstract The Trabectome (NeoMedix Corporation, San Juan Capistrano, CA, USA) is a US Food and Drug Administration—approved surgical device which removes a segment of the trabecular meshwork and the inner wall of the Schlemm’s canal using an ab-interno approach, enhancing aqueous outflow via increased access to the Schlemm’s canal and the collector channels. This is a bleb-less procedure which spares the conjunctiva, hence does not adversely affect the outcome of subsequent conventional glaucoma filtration surgeries. Multiple studies have shown that Trabectome surgery results in a reduction in IOP and the number of ocular hypotensive agents, though the efficacy is modest compared with conventional filtration surgery. The safety profile of Trabectome surgery is favorable compared with conventional glaucoma surgery, with the most common complication being intraoperative and postoperative bleeding. Additional research is required to understand how the efficacy of Trabectome surgery can be maximized.
3

Charchalac Ochoa, Sebastian Ignacio, Ken Ushijima, Nowaki Hijikata, and Naoyuki Funamizu. "Treatment of Greywater by Geotextile Filter and Intermittent Sand Filtration." In Resource-Oriented Agro-sanitation Systems, 195–210. Tokyo: Springer Japan, 2018. http://dx.doi.org/10.1007/978-4-431-56835-3_14.

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Vairagi, Purushottam Das, and Rajesh Roshan Dash. "Evaluation of Dolochar as a Filter Media in Slow Sand Filtration." In Water Science and Technology Library, 221–30. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5795-3_18.

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Jalizi, Samira, Ken Ashley, and Colleen C. V. Chan. "Restoration of an Urban Creek Water Quality Using Sand and Biochar Filtration Galleries." In Ecocities Now, 161–73. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58399-6_11.

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Ramísio, P. J., and J. M. P. Vieira. "Heavy metal removal efficiency in a kaolinite–sand media filtration pilot-scale installation." In Alliance For Global Sustainability Bookseries, 319–29. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6010-6_29.

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Eturki, Saifeddine, Feryel Hajjaji, and Kawther Ben Moussa. "Nitrogen Removal from Secondary Effluents Through a Simple and Double Filtration on Sand Filter." In Advances in Science, Technology & Innovation, 203–6. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-00808-5_47.

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Ramísio, Paulo J., and José M. P. Vieira. "Evaluation of Zn, Cu and Pb Sorption-Desorption Phenomena in Kaolinite-Sand Media Filtration Pilot Scale Installation." In Highway and Urban Environment, 319–27. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3043-6_34.

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Packman, Aaron I., Norman H. Brooks, and James J. Morgan. "Experimental Techniques for Laboratory Investigation of Clay Colloid Transport and Filtration in a Stream with a Sand Bed." In The Interactions Between Sediments and Water, 113–22. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5552-6_12.

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"Slow Sand Filtration." In Water Treatment Unit Processes, 709–62. CRC Press, 2018. http://dx.doi.org/10.1201/9781315276052-23.

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Conference papers on the topic "Filtration – sang":

1

Kohne, Roger W., and Gary S. Logsdon. "Slow Sand Filtration." In World Water and Environmental Resources Congress 2001. Reston, VA: American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40569(2001)483.

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Hosseini, Seyed Abolhassan, Morteza Roostaei, Farshad Mohammadtabar, Mohammad Mohammadtabar, Mohammad Soroush, Kelly Berner, Mahdi Mahmoudi, Roger Miller, and Vahidoddin Fattahpour. "Hybrid Sand Control Screen Using the Combined Surface and Depth Filtration." In SPE Western Regional Meeting. SPE, 2021. http://dx.doi.org/10.2118/200830-ms.

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Abstract Development of weakly and unconsolidated sand reservoirs require effective sand control media to prevent sand production. The existing sand control devices in the market are either relying on surface filtration to prevent sand production through size exclusion or bridging or depth filtration which relies on the pore size distribution of a porous filter or pack to prevent the sand from producing along the production fluids. In this study, we introduce a new hybrid sand screen that works based on a combined surface and depth filtration. Radial Sand Control Evaluation (RSCE) testing facility was used to compare the solid production and flow performance of the new hybrid screen with various mesh media in multi-phase gas and liquid flow under various fluid injection scenarios. Solid production and flow performance were compared with investigated cases. The new hybrid screen provides an optimized Open to Flow Area (OFA) in comparison to available surface filtration or depth filtration media, which provides required OFA, while prevents sanding. The robust design, low cost and manufacturing ease make it a suitable screen media for most sand control applications. The sand retention test results under various fluid injection scenarios including multi-phase oil, brine, and gas show that it outperforms the Dutch Twill (DT) weave and Reverse Dutch Twill (RDT) weave of equivalent aperture size, with better flow performance at constant flow rate tests compare to best-performing mesh media, while keeping the produced sand far below the acceptable thresholds. Hybrid design handles both high velocity and high Gas-Oil Ratio (GOR) better than equivalent depth filtration media of equivalent size. This paper presents a detailed characterization, flow performance testing of a new hybrid sand control media that combines the surface filtration and depth filtration properties to achieve better solid retention and flow performance. The hybrid screen media is suitable for high-rate producers with high GOR. Keywords: Hybrid Screen, Surface Filtration, Depth Filtration, Radial Sand Control Evaluation (RSCE) Testing
3

Yeon, Seungjae, Jusuk An, Changseog Oh, and Hyun je Oh. "A Study on Artificial Intelligence-Based Sand Filtration Backwash Cycle Determination Method for Improving Sand Filtration Process Maintenance Performance." In The 7th International Conference of Recent Trends in Environmental Science and Engineering (RTESE 2023). Avestia Publishing, 2023. http://dx.doi.org/10.11159/rtese23.161.

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Erickson, Andrew J., Peter T. Weiss, and John S. Gulliver. "Enhanced Sand Filtration for Storm Water Phosphorus Removal." In World Environmental and Water Resources Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40856(200)384.

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Khire, Milind V., Duraisamy S. Saravanathiiban, Mark Verwiel, Christopher Prucha, and Terry Johnson. "Stormwater Sediment Filtration Using Sand versus Synthetic Fibers." In IFCEE 2015. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479087.264.

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Li, Cui, Yifan Wu, Liangbo Zhang, and Wen Liu. "Treatment Efficiencies of Slow Sand Filtration for Landscape Water." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517344.

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Bruno Segalla Pizzolatti, Marcus Bruno Domingues Soares, Denise Conceição de Gois Santos Michelan, Luis Romero Esquivel, and Maurício Luiz Sens. "Water treatment for rural areas by slow sand filtration." In 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.29433.

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Al-Kaabi, Maryam Ali, Mohammad Ahmad Al-Ghouti, Nabil A. Zouari, and Talaat Abdelfattah Ahmed. "An Integrated Approach to Produced Water Treatment using Sand Filtration, Activated Carbon and Microemulsions modified Activated Carbon." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0066.

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The produced water from natural gas production process in the North field offshore is considered as the largest wastewater volume in Qatar, which could be potentially used for clean water resources for the industry as well as for some other domestic uses, if it is treated properly. This research aims to study the physical and chemical characterizations of the produced water from the North field and examine the removal of major inorganic and organic pollutants and heavy metals from the PW by using different treatments method such as using the sand filtration, activated carbon filtration and modified activated carbon filtration. The physical and chemical characterization of produced water was examined followed by treatment through sand filtration coupled with activated carbon and microemulsion modified activated carbon techniques. The results of characterization showed that the produced water had high concentration of COD, TOC, BTEX and various metals. After sand filtration, considerable reduction in TSS and COD was achieved. Furthermore, BTEX were also removed by more than 93% except for toluene. However, sand filtration was not enough to remove most of the metals and ions. Therefore, further treatment was done through activated carbon and modified activated carbon and their treatment efficiency was compared. Both techniques were able to achieve higher removal efficiencies for BTEX, metals and ions. Thus, the treated water was free from all major pollutants of PW and can be considered suitable for reuse at industrial application. Further studies and applications could be applied on produced water such as studying the biological characterization and applying biological treatment processes.
9

Shaoming Lu, Zhichang Shao, Gaohui Zhong, Jiangling Chen, Jie Yang, and Jianyong Guo. "BAC filtration - disinfection - sand filtration combination technology for handling risk of microorganism leak in O3-BAC process." In 2011 International Conference on Multimedia Technology (ICMT). IEEE, 2011. http://dx.doi.org/10.1109/icmt.2011.6002864.

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Ellenburg, Walter Lee. "Study of Low Dosage Pre-Ozonation on Sand Filtration Efficiency." In World Environmental and Water Resources Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41036(342)533.

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Reports on the topic "Filtration – sang":

1

Baldwin, Richard. PR-015-084508-R01 Contaminants in Sales Gas Pipelines Sources Removal and Treatment. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), September 2010. http://dx.doi.org/10.55274/r0010029.

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The objective of this project is to provide information about a problem material found in gas pipelines called "black powder". It is a mixture or a chemical compound of iron sulfides, iron oxides, dirt, sand, salts, chlorides, water, glycols, hydrocarbons and compressor oils, mill scale, or other materials. The most common constituents, iron compounds of sulfur or oxygen, are corrosion products. In addition to chemical formation, black powder can be formed by microbes normally found in gas pipelines. This material causes machinery, measurement, and pipeline maintenance problems. This research investigates the forms of iron sulfides, their characteristics, and methods of formation and whether the molecular form can be an indicator of the source of the material. A sampling protocol was developed for proper collection of materials for analysis. Seventeen corrosion samples were collected and analyzed for material constituents and microbial content. The results of this testing were anonymously tabulated in a database. Other tasks in this project include guidelines for removal, handling, and disposal of the material. It discusses symptomatic versus root cause treatments for the prevention and control of black powder, and the corporate culture necessary to manage the problem. It presents recently developed technologies for cleaning or treating a pipeline containing black powder, such as cleaning and anti-microbial agents containing THPS which dissolve iron sulfides, and the use of magnetic filtration. The final task describes concepts for identifying the location of black powder in an operating pipeline and places to look and methods to use to best determine the distribution of the material.

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