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DIALNET OAI Articles (561,989 recursos)
Dialnet (Difusión de Alertas en la Red) es una plataforma de recursos y servicios documentales, cuyo objetivo fundamental se centra en mejorar la visibilidad y el acceso a la literatura científica hispana a través de Internet.

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Mostrando recursos 101 - 120 de 12,064

101. High throughput biofiltration for odour control at water purification plant - Zhukov, Vitaliy; Vepritzky, Andrey; Mitin, Leonid; Popov, Vladimir
A high throughput trickling biofilter for odour control was designed basing on the principles of biotrickling filter technology developed in Moscow Bakh Institute of Biochemistry. All the necessary blocks except a fan: temperature and humidity control unit, a biofilter bed, an irrigation system, a control block and display unit are combined within one compact biofiltration module � a standard container 6000x2400x2400 mm. The plant is thermo-insulated that enables outdoor installation. The biofilter is easily scaled up by adding extra filtration beds. A typical biofiltration module rated for 5,000-10,000 m3/h has a contact time of 3-6 s (biofilter bed total volume...

102. Odour and H2S degradation in a full scale biofilter with a mineral based organic coated filter media - Frechen, Franz-Bernd; Franke, Wolfram; Scholl, Björn
In order to minimize the odorous emissions from sludge storage tanks on the waste water treatment plant «Niederrad» of the city of Frankfurt/Main, about 12.000 m3/h of foul air has to be treated. Due to high Hydrogen-Sulphide (H2S) loads, the installed standard biofilter systems failed operation after one year. Thus, one of the existing filter beds was filled with a mineral based organic coated material; the other one was re-filled at the same time with a standard biofilter media to allow a comparative study. In a long term monitoring program from May 2006 to June 2007, both media were compared...

103. Refurbishment of an odour collection and biofilter treatment system at a municipal solid waste composting facility in Perth, Western Australia - Schulz, Terry J.; McAll, Stuart
This paper discusses a case study at a large, regional Municipal Solid Waste composting plant in Perth, Western Australia, where odour emissions from the facility have resulted in adverse odour impacts in the surrounding community. The plant was designed as a fully-enclosed operation, where all ventilation air from two major processing buildings was to be collected and treated in four large biofilters. The paper describes a detailed investigation into the collection and treatment systems at the plant, which identified deficiencies in the design of both systems. It contains the results of the physical and olfactory investigations, and documents the design...

104. A statistical perspective on biofilter performance in relation to the main process parameters and characteristics of untreated flows - Harreveld, Antón Philip van
A large number of olfactometric measurements of odour removal efficiency of municipal waste organic fraction and green waste composting installations were compiled and analysed graphically. The number of measurements and installations is >50 for treated gas characteristics and >15 for filter media characteristics. All installations concerned were located in the Netherlands and Belgium. All untreated and treated gas odour concentrations were measured in duplicate or triplicate, according to olfactometry standard EN13725 or its predecessor NVN2820. The data were then analysed using graphical methods to identify trends and relation between effectiveness of performance and a large number of operational parameters and...

105. Improving odour management and abatement performance using Olfactory GC-MS - Parcsi, Gavin; Stuetz, R.M.
The measurement of odorous emissions is usually assessed either as odour concentrations (OC) by dilution olfactometry or by the chemical analysis of the odorous compounds such as hydrogen sulphide or the separation of complex gas mixture using analytical instrumentation such as gas chromatography. These techniques either provide information on the perceived effect of the emission (olfactory) or characterise the odours in terms of their chemical composition (analytical) but provide limited information on the relationship between odour impact and the chemical composition. The integration of chemical and olfactory techniques using olfactory-gas chromatography allows for the correlation of chemical and sensory measurements...

106. Pressure error estimates of a stable linear semi-implicit Euler Finite Element scheme for a penalized nematic liquid crystal model - Guillén González, Francisco Manuel; Tierra Chica, Giordano

107. Derivation of a new viscous shallow water model with dependenc on depth - Rodríguez Seijo, José Manuel; Taboada Vázquez, Raquel

108. Asymptotic behavior of the Stokes system in a thin film flow with a rough boundary - Bresch, Didier; Casado-Díaz, Juan; Luna Laynez, Manuel; Suárez Grau, Francisco Javier

109. New nonlinear subdvision schemes and their properties - Aràndiga Llaudes, Francesc; Donat, Rosa; Santágueda, María

110. Plasma boundary reconstruction using topological asymptotic expansion - Jaoua, Mohamed; Hassine, Maatoug; Sabit, Souhila

111. Libor Market Model for pricing derivatives on two interest rate curves - Fernández Pérez, José Luis; Pou Bueno, Marta; Rodríguez Nogueiras, María; Vázquez Cendón, Carlos

112. Effect of geometry and notch depth on the triaxiality of SPT specimens - Montero, R.; Peñuelas Sánchez, Inés

113. Well-balanced flux-splitting finite volume methods using two matrices. Application to Shallow Water Equations with topography - Fernández Nieto, Enrique Domingo; Ferreiro Ferreiro, Ana María; García Rodríguez, José Antonio; Martínez Gavara, Anna

114. Approximate boundary conditions based on a complete transparent condition for the acoustic wave equation - Barucq, Hélène; Diaz, Julien; Duprat, Véronique

115. Tikhonov and TV regularizations to retrieve thermal conductivity depth-profiles from infrared thermography data - Celorrio de Pablo, Ricardo; Apiñaniz Fernández de Larrinoa, Estibaliz; Mendioroz Astigarraga, María Aránzazu; Salazar Hernández, Agustín

116. High-order discretizations for the wave equation based on the modified equation technique - Agut, Cyril; Diaz, Julien

117. Mathematical Modelling in Food Engineering - Infante del Río, Juan-Antonio; Ivorra, Benjamín; Ramos del Olmo, Angel Manuel; Rey Cabezas, José María; Smith, Nadia; Fraguela, Andrés
This work deals with the modelling and simulation of the effect of the combination of thermal and high pressure processes, focusing on the inactivation that occurs during the process of certain enzymes and microorganisms that are harmful to food. We propose various mathematical models that study the behavior of these enzymes and microorganisms during and after the process, and study some related inverse problems.

118. On an electrothermomechanical model arising in steel heat treating - Díaz Moreno, José Manuel; García Vázquez, Concepción; González Montesinos, María Teresa; Ortegón Gallego, Francisco
Steel heat treating is very important for many industrial purposes. In this paper, we describe a mathematical model for the heating-cooling process of a steel workpiece leading to the desired hardness. The resulting model consist of a strongly coupled nonlinear system of PDEs/ODEs. A simpler version of this model is used for the numerical simulation of the hardening process of a car steering rack.

119. Shape optimization by the level set method - Jouve, F.

120. An eddy current problem related to electromagnetic forming - Bermúdez de Castro López-Varela, Alfredo; Muñoz Sola, Rafael; Salgado Rodríguez, Pilar; Reales, Carlos; Rodríguez, Rodolfo
Electromagnetic forming is a high velocity cold forming process for electrically conductive materials. The aim of this paper is to analyze a numerical method to solve a transient axisymmetric eddy current problem arising from mathematical modelling of the process. We deal with a degenerate parabolic partial differential equation. Well-posedness can be proved by using regularization arguments. For numerical solution, a finite element method in space combined with an implicit Euler time discretization is proposed. Error estimates are obtained and numerical results are shown.

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