DIALNET OAI Articles
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.
Co-treatment of benzene and toluene vapours in a biofilter: a factorial design approach - Rene, Eldon R.; Swaminathan, T.
Biofiltration has now become an indispensable treatment technique for the removal of low concentrations of Volatile Organic Compounds (VOCs) from process vent streams. This study involves performance evaluation of a laboratory scale compost based biofilter for the treatment of mixtures of benzene and toluene (BT) vapours. Experiments were conducted as per a statistical design of experiment, the 2k full factorial design, with the initial concentrations of benzene and toluene and the gas flow rate as the independent variables and the elimination capacity (EC) and removal efficiency (RE) as response variables. The maximum EC attained was 31.7 g/m3.h for benzene and...
Modelling the absorption of styrene and acetone on activated carbon and perlite beds - Gerrard, Andrew Mark; Mollencamp, Sebastian; Makinde, Kehinde; Paca, Jan; Misiaczek, Ondrej
Experimental data from the Institute of Chemical Technology, Prague were analysed to derive some simple models of the rate of adsorption of either styrene or acetone from dilute air mixtures on sterile beds of activated carbon or perlite. It was found that the rate of progress towards the saturation of these beds could be reasonably accurately represented by a first order Lagergren model, where the rate constant had a value in the range 0.0039 to 0.29 min-1.
Modeling of biomass accumulation and filter bed st6ructure change in biofilters for gaseous toluene removal - Xi, Jinying; Hu, Hong-Ying; Wang, Can
In this study, a proper microbial growth model was established and analyzed to investigate the biomass accumulation process in biofilters. Four biofilters treating gaseous toluene were set up in parallel and were operated under different inlet toluene loadings for 100 days. Based on the experimental data of microbial biomass and toluene removal rate, the kinetic parameters were decided by either estimation from literature or parameter regression. The calculation results based on the model showed a good agreement with the experimental data of biomass change. By applying the model, it is found that lower than 50% of biomass in the filter...
Gasoline biofiltration: an analytic model - Gerrard, Andrew Mark; Halecky, Martin; Paca, Jan
We present an analytical method of solution for a pair of models representing the removal of gasoline from air by biofiltration. The experimental data showed that the aromatic components of the gasoline were more readily digested than the aliphatics. The models, involving two or three fitted parameters, fitted the laboratory data well.
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...
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...
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...
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...