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DIALNET OAI Articles (560,995 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 1 - 20 de 11,967

1. Modeling of a fungal biofilter for the abatement of hydropic VOCs - Vergara Fernández, Alberto; Revah, Sergio
This work describes the growth of filamentous fungi in biofilters for the degradation of hydrophobic VOCs. The study system was n-hexane and the fungus Fusarium solani B1. The system is mathematically described and the main physical, kinetic data and morphological parameters of aerial hyphae were obtained by independent experiments for model validation. The model proposed in this study describes the increase in the transport area by the growth of the filamentous cylindrical mycelia and its relation with n-hexane elimination in quasi -stationary state in a biofilter. The model describing fungal growth includes Monod-Haldane kinetic and hyphal elongation and ramification. The...

2. Membrane inlet mass spectrometry (MIMS) as a tool for evaluating biological air filters in agriculture - Feilberg, Anders
Membrane inlet mass spectrometry (MIMS) is presented as a new tool for monitoring the removal efficiency of biofilters with respect to odour compounds. The MIMS technique is based on the separation of volatile chemicals and gases from an air stream by a thin silicone membrane adjacent to the ion source of a standard quadropole mass spectrometer. The vacuum conditions of the MS forces the separated compounds to diffuse through the membrane and evaporate in the ion source. The compounds are detected by MS by means of specific molecular ions or fragment ions. It is possible to monitor a number of...

3. Removal of odour and ammnia in ventilation air from growing-finishing pig units using vertical biofilters - Leegaard Riis, Anders
The aim of this study was to investigate the removal of odour and ammonia from outlet air using vertical biofilters in two units with growing-finishing pigs in the winter. Woodchips were used as media in the wall of the biofilters. The air from the pig units was humidified by a high-pressure water system before it reached the biofilters. A total of 56 odour and ammonia measurements were taken at an average outdoor temperature of 5.4 C. The biofilters significantly reduced the odour concentration (OUE/m3) in the outlet air (P<0.001). The measured odour removal efficiency averaged 60 %. In contrast, the...

4. Continuous monitoring of odours at a biofilter outlet - Sironi, Selena; Capelli, Laura; Céntola, Paolo; Rosso, Renato Del; Grande, Massimiliano
The experience matured in the field of biofiltration applied to odour removal enabled to study the correlation between some of the characteristic parameters of the biofilter bed (e.g. T, RH, ?P) with the emitted odour concentration. Today odour measurement can be performed only by classical olfactometry. Classical olfactometry is an expensive and time-consuming method that is not suitable for continuous monitoring as needed by operators of compost facilities. This paper describes the experimental approaches adopted for the development of a system for the continuous monitoring of odour emissions, i.e. an instrument for the repeated air analysis, capable of qualitatively and...

5. 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...

6. 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...

7. 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...

8. 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...

9. 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...

10. 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

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

12. 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

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

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

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

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

17. 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

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

19. 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

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

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