Academic literature on the topic 'Biofiltras'

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Journal articles on the topic "Biofiltras"

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Zagorskis, Alvydas, and Renata Spiečiūtė. "RESEARCH ON THE AERODYNAMIC RESISTANCE OF TRICKLE BIOFILTER / LAŠELINIO BIOFILTRO AERODINAMINIO PASIPRIEŠINIMO TYRIMAI." Mokslas - Lietuvos ateitis 3, no. 5 (2011): 64–69. http://dx.doi.org/10.3846/mla.2011.088.

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A four – section trickle biofilter was constructed for experimental research. The filter was filled with the packing material of artificial origin. The material consists of plastic balls having a large surface area. The dependence of biofilter aerodynamic resistance on supply air flow rate and the number of filter sections was determined. The aerodynamic resistance of the biofilter was measured in two cases. In the first case, the packing material of the filter was dry, whereas in the second case it was wet. The experimental research determined that an increase in the air flow rate from 0.043
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Baltrėnas, Pranas, and Alvydas Zagorskis. "INVESTIGATION INTO THE AIR TREATMENT EFFICIENCY OF BIOFILTERS OF DIFFERENT STRUCTURES." JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 18, no. 1 (2010): 23–31. http://dx.doi.org/10.3846/jeelm.2010.03.

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Biological air treatment devices, biofilters, of four different structures with different origin charges, composed of natural zeolite granules, foam cubes and wood chips, were used for the experimental investigation. Biological and ad‐sorptive air treatment methods are employed to clean the air from volatile organic compounds by mixing foam and zeolite with wood chips. The use of complex cleaning technologies improves the efficiency of the device and extends the useful life of a charge. The investigation showed that microorganisms predominant in the process of biocleaning could also propagate
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Pedreira, Marcelo Mattos, Ronald Kennedy Luz, José Cláudio Epaminondas dos Santos, Edson Vieira Sampaio, and Rafael Sá Fortes Silva. "Biofiltração da água e tipos de substrato na larvicultura do pacamã." Pesquisa Agropecuária Brasileira 44, no. 5 (2009): 511–18. http://dx.doi.org/10.1590/s0100-204x2009000500011.

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O objetivo deste trabalho foi avaliar o uso de diferentes biofiltros e substratos na qualidade da água e no desempenho de larvas de Lophiosilurus alexandri. Os tratamentos usados foram: sistema sem biofiltro (SB); biofiltro interno ao tanque com substrato de cascalho de diâmetro médio de 1,6 cm (CMe); biofiltro interno ao tanque com cascalho de diâmetro médio de 2,1 cm (CMa); biofiltro interno ao tanque com substrato constituído de uma mistura de 70% de brita (diâmetro médio de 1,3 cm) e 30% de concha (diâmetro médio de 1,1 cm) (CB); e sistema fechado (SF) com biofiltro externo aos tanques, co
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Baltrėnas, Pranas, та Alvydas Zagorskis. "INVESTIGATION OF CLEANING EFFICIENCY OF BIOLOGICAL AIR‐TREATMENT DEVICE WITH ACTIVATED CHARGE OF DIFFERENT ORIGIN/BIOLOGINIO ORO VALYMO ĮRENGINIO SU AKTYVINTA SKIRTINGOS KILMĖS ĮKROVA VALYMO EFEKTYVUMO TYRIMAI/ ИССЛЕДОВАНИЕ ЭФФЕКТИВНОСТИ УСТАНОВКИ ДЛЯ БИОЛОГИЧЕСКОЙ ОЧИСТКИ ВОЗДУХА С АКТИВИРОВАННОЙ ЗАГРУЗКОЙ РАЗЛИЧНОГО ПРОИСХОЖДЕНИЯ". JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 16, № 3 (2008): 113–20. http://dx.doi.org/10.3846/1648-6897.2008.16.113-120.

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In order to carry out an experimental investigation a biological air‐treatment device was used, namely, a biofilter with a charge of a different origin composed of zeolite, foam and wood chips. When mixing foam and zeolite together with wood chips for air treatment from volatile organic compounds, not only a biological but also adsorptive air‐treatment method is used. Using complex treatment technologies the device efficiency and the charge service period are improved. The investigation has shown that microorganisms, being predominant in the bio‐treatment process, can breed in charges of on in
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Vicente Reyes, Jimmy. "Determinación de la eficiencia del aserrín y la fibra de coco utilizados como empaques para la remoción de contaminantes en Biofiltros para el tratamiento de aguas residuales." Enfoque UTE 7, no. 3 (2016): 41–56. http://dx.doi.org/10.29019/enfoqueute.v7n3.104.

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El agua es un recurso muy utilizado por la humanidad tanto para uso industrial y doméstico, la cual se descarga en la red de alcantarillado público o pozos sépticos. El presente proyecto propone una alternativa ecológica de tratamiento de aguas residuales domésticas llamada Biofiltro, que se construye de material vivo (lombrices) e inerte (viruta y grava). Al irrigar el agua residual en este filtro biológico se ha demostrado alta eficiencia en la remoción de materia orgánica y organismos patógenos. El trabajo de campo se llevó a cabo con Biofiltros experimentales en los que para obtener mejore
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Zigmontienė, Aušra, та Lukas Žarnauskas. "INVESTIGATION AND ANALYSIS OF AIR-CLEANING BIOFILTER HYBRID BIOCHARGE QUANTITATIVE AND QUALITATIVE PARAMETERS / ORO VALYMO BIOFILTRO MIŠRIOS ĮKROVOS KIEKYBINIŲ IR KOKYBINIŲ MIKROBIOLOGINIŲ PARAMETRŲ TYRIMAI / ИССЛЕДОВАНИЕ КОЛИЧЕСТВЕННЫХ ИК А ЧЕСТВЕННЫХ МИКРОБИОЛОГИЧЕСКИХ ПАРАМЕТРОВВОЗДУХООЧИСТНОГО БИОФИЛЬТРА ПРИ СМЕШАННОЙ ЗАГРУЗКЕ". Journal of Environmental Engineering and Landscape Management 19, № 1 (2011): 81–88. http://dx.doi.org/10.3846/16486897.2011.557472.

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Investigation of microorganism quantitative and qualitative parameters in the hybrid load of the biofilter allows improving the parameters of one of the most effective and cheapest air cleaning technologies of volatile organic compounds (VOCs)—biofiltration process. The point of biofiltering is the partitioning of volatile organic compounds during the metabolism of microorganisms. In pursuance to assure the best conditions for their growth, the biofilter is loaded with biocharge mixture made of zeolite, foam and wood shavings. The device is filled with VOCs mixture consisting of: acetone of ke
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Garcia, Jesús Villalobos, Claire Vialle, Caroline Sablayrolles, et al. "Étude de la performance du milieu filtrant constitué d’une couche de chènevotte sur une couche de grignons d'olives dans le traitement des eaux usées domestiques : du pilote à l’échelle industrielle." Revue des sciences de l’eau 32, no. 1 (2019): 1–10. http://dx.doi.org/10.7202/1059876ar.

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Résumé Deux matériaux, sous-produits agro-industriels, ont été étudiés en biofiltration à l'échelle pilote : la chènevotte en tant que « couche active », sur des grignons d'olives en tant que « couche de support ». L'objectif était d'étudier la capacité de ces deux matériaux travaillant ensemble comme un seul milieu filtrant poreux. L'impact de la hauteur de la couche active sur la performance du biofiltre a été étudié expérimentalement grâce à deux biofiltres, un premier présentant une répartition des matériaux en deux hauteurs égales, l’autre avec 80 % de couche active sur 20 % de hauteur de
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Søberg, Laila C., Maria Viklander, and Godecke-Tobias Blecken. "The influence of temperature and salt on metal and sediment removal in stormwater biofilters." Water Science and Technology 69, no. 11 (2014): 2295–304. http://dx.doi.org/10.2166/wst.2014.161.

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Stormwater biofilters are used to treat stormwater runoff. In countries with cold winter climates, biofilters are subject to low temperatures which, in some cases, are combined with potentially high salt concentrations from road de-icing, potentially affecting the biofilter's performance. Since stormwater biofilters have been developed without consideration of their critical winter use, a laboratory study was carried out to evaluate the performance of stormwater biofilters subjected to low and high temperatures, with and without salt. Both factors and their interaction had a significant effect
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Amiel, Christophe, Sylvie Gillot, Michel Roustan, and Alain Héduit. "Vers une méthode de mesure du transfert d'oxygène en biofiltres." Water Quality Research Journal 37, no. 4 (2002): 729–43. http://dx.doi.org/10.2166/wqrj.2002.049.

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Abstract L'objectif du travail présenté était d'une part de préciser les conditions d'adaptation aux biofiltres des méthodes de mesure “usuelles” en eau claire du transfert d'oxygène, d'autre part, de déterminer si l'addition de cobalt pouvait être évitée pour ralentir l'oxydation du sulfite. Trois méthodes de mesure ont été mises en oeuvre en eau claire et comparées sur colonne à bulles et en pilote biofiltre : la méthode de réoxygénation, la méthode des bilans gazeux et la méthode du dosage du sulfite. Les essais réalisés à différents débits d'air en présence d'une forte concentration en sul
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Gilbert, Yan, Yann Le Bihan, Gerardo Buelna, and Paul Lessard. "Application de la respirométrie pour le suivi de l'activité de la biomasse d'un biofiltre sur lit organique traitant du lisier de porc." Water Quality Research Journal 40, no. 2 (2005): 155–63. http://dx.doi.org/10.2166/wqrj.2005.018.

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Abstract L'opération de systèmes de biofiltration à support organique nécessite le développement de méthodes de suivi simples et rapides La respirométrie de type LSS a donc été adaptée afin d'évaluer l'activité potentielle des organismes hétérotrophes présents dans le biofiltre. Des essais respirométriques ont été réalisés à différentes concentrations de milieu filtrant afin d'adapter la méthode à cette biomasse, fixée sur le support. Des colonnes de biofiltration de laboratoire ont été montées et alimentées à des charges hydrauliques et massiques variables et à des durées de fonctionnement di
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Dissertations / Theses on the topic "Biofiltras"

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Strazdauskas, Konstantinas. "Biofiltracijos procesų taikymo nuotekų valymui tyrimai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120726_163325-08936.

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Biofiltraciniai įrenginiai - tai alternatyva standartiniams veikliojo dumblo valymo įrenginiams. Tinkamai įrengus ir naudojant šiuos filtrus galima ženkliai sumažinti eksploatacijos išlaidas bei pasiekti pageidaujamų išvalymo kokybės rezultatų. Biofiltrų efektyvumas labai priklauso nuo naudojamo užpildo tipo, todėl šiame darbe buvo nagrinėjama naujo užpildo nuotekų biofiltracijai tinkamumas. Atlikti tyrimai parodė, kad pasirinkti akmens vatos užpildai yra tinkami naudoti laistomuosiuose filtruose ir juose gali vykti organinių medžiagų šalinimas ir nitrifikacija. Organinių medžiagų šalinimo efe
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Pham, Hoang Lam. "Fonctionnement des biofiltres : approche numérique de certains couplages hydrodynamique/bioflms et modélisation." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI073/document.

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.Le transport de soluté en présence de biofilms en milieux poreux est un problème rencontré dans de nombreuses applications industrielles (biofiltration des eaux usées et traitement de polluants atmosphériques notamment). En termes de modélisation, l'interaction entre biologie, hydrodynamique et chimie reste difficile à comprendre aux échelles les plus fines: cela a conduit à une large utilisation de modèles macroscopiques, plus simple à manipuler. Cependant, la question consiste à écrire des modèles macroscopiques suffisamment complexes pour prendre en compte les processus pertinents représen
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Soret, Rémi. "Etude des émissions de bioaérosols par les bioprocédés : Application aux biofiltres Investigation of Removal Capacities of Biofilters for Airborne Viable Micro-Organisms." Thesis, IMT Mines Alès, 2019. http://www.theses.fr/2019EMAL0004.

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Les procédés biologiques sont parmi les techniques les plus efficaces pour traiter les pollutions organiques dans l’eau (STEP), l’air (Biofiltre, Biolaveur) et les solides (compostage). Leur utilisation s’est développée ces dernières années. Parallèlement, de nouvelles interrogations ont émergé concernant leurs possibles émissions de micro-organismes dans l’air. Dans le cadre du traitement de la pollution chimique de l’air les procédés de biofiltration sont de plus en plus utilisés de par leur relative simplicité et coût d’utilisation. Cependant, l’analyse de la littérature permet de souligner
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Torres, Zuniga Jesus Ixbalank. "Simulation and control of denitrification biofilters described by PDEs Simulation et commande d'un biofiltre de dénitrification décrit par des EDP." Phd thesis, Université Paul Sabatier - Toulouse III, 2010. http://tel.archives-ouvertes.fr/tel-00512336.

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Cette thèse concerne la simulation et la commande d'un biofiltre de dénitrification. Selon que l'on considère ou que l'on néglige la diffusion, des modèles d'EDP paraboliques ou hyperboliques sont considérés. En plus des classiques méthodes des lignes, des approches spécifiques au type d'EDP sont évaluées pour simuler le système. La méthode des caractéristiques s'applique aux systèmes d'EDP hyperboliques. L'analyse modale utilisée pour les systèmes d'EDP paraboliques permet de manipuler un système d'ordre réduit. L'objectif de commande est alors de réduire la concentration en azote en sortie d
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Pavanelli, Gerson. "Biofiltro submerso modificado para pós-tratamento do efluente de lagoas de estabilização." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-07102014-151515/.

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Esta pesquisa propôs o desenvolvimento de um sistema de biofiltros submersos, modificados com base na configuração de filtros de pedra, visando o pós-tratamento do efluente de lagoas de estabilização, inicialmente para a remoção de algas. A modificação consiste na variação das alturas da camada filtrante e na colocação de tampa na superfície do BS, evitando o acesso da luz. O esgoto tratado captado na lagoa de maturação foi feito em duas profundidades – a 60 cm de profundidade da superfície da lagoa (denominada zona superficial) e a 180 cm de profundidade da superfície da lagoa (denomina
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Aizpuru, Aitor. "Biofiltration d'un mélange de COV." Pau, 2001. http://www.theses.fr/2001PAUU3004.

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McIvor, Anna Louise. "Freshwater mussels as biofilters." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616028.

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Ramirez, Lopez Elsa Marcela. "Elimination de composés organiques volatils (COV) présents dans l'air par un biofiltre à garnissage naturel structuré." Poitiers, 2001. http://www.theses.fr/2001POIT2290.

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Malhautier, Luc. "Etude des bactéries nitrifiantes du genre nitrobacter impliquées dans la biofiltration." Pau, 1996. http://www.theses.fr/1996PAUU3014.

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La biofiltration apparaît comme une technique performante potentiellement applicable à de nombreuses émissions gazeuses. Cependant, le contrôle et l'optimisation de ce procédé sont fortement dépendants de la connaissance des microorganismes assurant l'abattement d'odeurs et plus précisément de l'ammoniac. Aussi, l'étude des bactéries responsables est-elle obligatoire et trois aspects ont été abordés : la détection, le dénombrement et la diversité de ces germes. Deux méthodes performantes de détection et de denombrement des bactéries du genre nitrobacter dans les sols ont été adaptées à un biof
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Karrabi, Seyed Mohsen. "Couplage hydrodynamique - biofilm en milieu poreux : application aux biofiltres." Grenoble INPG, 2009. http://www.theses.fr/2009INPG0012.

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Les biofiltres sont des milieux poreux saturés contenant un matériau support permettant la croissance d'une biomasse épuratrice sous forme de biofilm. La croissance du biofilm conduit à un colmatage progressif du biofiltre, entraînant des modifications de la structure interne du milieu poreux. Ceci entraine des variations de performances du bioréacteur. En vue de la compréhension et de l'optimisation de ces procédés, les couplages entre l'hydrodynamique et la croissance de la biomasse ont été étudiés expérimentalement dans cette thèse. Un pilote expérimental et des méthodes d'analyses original
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Books on the topic "Biofiltras"

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Speitel, Gerald E. Cometabolism of trihalomethanes in nitrifying biofilters. Awwa Research Foundation, 2005.

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Bouwer, Edward J. Removal of natural organic matter in biofilters. AWWA Research Foundation, 1995.

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Farrugia, Valerie Margaret. The development and properties of biofilms in biofilters. National Library of Canada, 1999.

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Pawłowska, Małgorzata. Usuwanie metanu z gazu składowiskowego w biofiltrach metanotroficznych. Komitet Inżynierii Środowiska PAN, 2010.

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Fernando, Morgan-Sagastume. Effects of biomass growth on pressure drop in biofilters. National Library of Canada, 1999.

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Castro, Ana Maria De. Fatty acid methyl ester analysis of microbial communities in biofilters inoculated with different sources. National Library of Canada = Bibliothèque nationale du Canada, 1999.

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Msuya, Flower E. The performance of the seaweeds ulva reticulata and chaetomorpha crassa as biofilters in land based intergrated mariculture: Nutritional parameters and photosynthesis. Western Indian Ocean Marine Sciences Association, 2004.

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Miller, Martha Jane. Transport and degradation of hydrophobic pollutants in biofilms in biofilters. 2004.

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(Editor), G. Speitel, L. Katz (Editor), D. Wahman (Editor), and J. Fairey (Editor), eds. Cometabolism of Trihalomethanes in Nitrifying Biofilters: Awwarf Report 91100f (Awwarf Report). Intl Water Assn, 2007.

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Book chapters on the topic "Biofiltras"

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Harremoës, Poul, and Mogens Henze. "Biofilters." In Wastewater Treatment. Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04806-1_5.

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Fischer, Klaus. "Biofilters." In Biotechnology. Wiley-VCH Verlag GmbH, 2008. http://dx.doi.org/10.1002/9783527620968.ch14.

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Rene, Eldon R., María C. Veiga, and Christian Kennes. "Biofilters." In Air Pollution Prevention and Control. John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118523360.ch4.

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Harremoës, Poul, and Mogens Henze. "Biofilters." In Wastewater Treatment. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-22605-6_5.

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Kennes, Christian, and María C. Veiga. "Conventional Biofilters." In Environmental Pollution. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-017-0930-9_3.

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Martin, A. M. "Biofilms in Peat Biofilters." In Biofilms — Science and Technology. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-1824-8_41.

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Siegrist, Robert L. "Treatment Using Porous Media Biofilters." In Decentralized Water Reclamation Engineering. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40472-1_8.

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Joyce, Alyssa, Mike Timmons, Simon Goddek, and Timea Pentz. "Bacterial Relationships in Aquaponics: New Research Directions." In Aquaponics Food Production Systems. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_6.

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AbstractThe growth rates and welfare of fish and the quality of plant production in aquaponics system rely on the composition and health of the system’s microbiota. The overall productivity depends on technical specifications for water quality and its movement amongst components of the system, including a wide range of parameters including factors such as pH and flow rates which ensure that microbial components can act effectively in nitrification and remineralization processes. In this chapter, we explore current research examining the role of microbial communities in three units of an aquaponics system: (1) the recirculating aquaculture system (RAS) for fish production which includes biofiltration systems for denitrification; (2) the hydroponics units for plant production; and (3) biofilters and bioreactors, including sludge digester systems (SDS) involved in microbial decomposition and recovery/remineralization of solid wastes. In the various sub-disciplines related to each of these components, there is existing literature about microbial communities and their importance within each system (e.g. recirculating aquaculture systems (RAS), hydroponics, biofilters and digesters), but there is currently limited work examining interactions between these components in aquaponics system, thus making it an important area for further research.
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Sieker, Carin, and Matthias Barjenbruch. "Experience with Biofilters in Wastewater Treatment." In Biotechnology. Wiley-VCH Verlag GmbH, 2008. http://dx.doi.org/10.1002/9783527620944.ch18.

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Gopinath, Margavelu, Rose Havilah Pulla, K. S. Rajmohan, Parthasarthy Vijay, Chandrasekaran Muthukumaran, and Baskar Gurunathan. "Bioremediation of Volatile Organic Compounds in Biofilters." In Energy, Environment, and Sustainability. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-7485-1_15.

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Conference papers on the topic "Biofiltras"

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Clar, M. L., B. Barfield, and T. O'Connor. "BMP Design Guidelines: Vegetative Biofilters." In World Water and Environmental Resources Congress 2004. American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40737(2004)66.

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Russell, James F., Robert M. Cowan, Jitendra A. Joshi, and David A. Vaccari. "Modeling Ammonia Removal in Biofilters: Physical and Chemical Calibration." In International Conference On Environmental Systems. SAE International, 1998. http://dx.doi.org/10.4271/981591.

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Lucas Dutra de Melo, George B Day, Joe L Taraba, and Guilherme Del Nero Maia. "Assessment of a Moisture Application System for Compost Biofilters." In 2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010. American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.29821.

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Jianfeng Wen and Wendong Tao. "Factors Influencing Enrichment of Anammox Bacteria in Baffled Biofilters." In 2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010. American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.29904.

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J Malia Andrus, Luis F Rodriguez, Matthew Porter, et al. "Microbial Community Patterns in Tile Drain Biofilters in Illinois." In 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica. American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.29392.

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Lynn, Thomas J., Miranda De La Garza, and Francisco Haces-Garcia. "Reclaimed Water Holding Pond Treatment Using Wood Chip Biofilters." In World Environmental and Water Resources Congress 2020. American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482957.011.

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Lynn, Thomas J., Mahmood H. Nachabe, and Sarina J. Ergas. "SWMM-5 Nitrate Removal Model for Denitrifying Stormwater Biofilters." In World Environmental and Water Resources Congress 2016. American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784479889.007.

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Hu, M., T. Zhang, J. Stansbury, et al. "Treatment of Greywater with Shredded-Tire Biofilters and Membrane Bioreactors." In World Environmental and Water Resources Congress 2011. American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41173(414)195.

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Lars Peter Nielsen, Susanne Juhler, Niels Peter Revsbech, Lars D.M Ottosen, Lise Bonne Guldberg, and Karen Soerensen. "Function of Biofilters Removing Ammonia from Pig House Ventilation Air." In Livestock Environment VIII, 31 August - 4 September 2008, Iguassu Falls, Brazil. American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.25480.

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Lima, Sandy Evelin Rodrigues, Elizabethy Ribeiro Almeida, Thayara França Pereira, Edilene Pinheiro Ferreira, Rodrigo Sávio Teixeira de Moura, and Mikele Cândida S. Sant'Anna. "SIMULAÇÃO DE UM BIOFILTRO DE LEITO FLUIDIZADO PARA A AQUICULTURA." In II Congresso Brasileiro de Fluidodinâmica Computacional. Galoa, 2018. http://dx.doi.org/10.17648/cbcfd-83146.

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Reports on the topic "Biofiltras"

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Song, JiHyeon, and Kerry A. Kinney. A Method for Enhanced Control of Biomass Activity and Distribution in Biofilters. Defense Technical Information Center, 1999. http://dx.doi.org/10.21236/ada382824.

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