Odor abatement

Tijmensen, W. G., Odor abatement in coffee roasting factories, PT Procestech 33, 575, 1978. (CA90 109040x)... 

The extent to which a panel constitutes a representative sample of the population depends directly on the numbers of panel members. For practical reasons a compromise must be sought between costs and the representativeness of the result, and this depends on the question to be answered basic measurement e.g. emission standards or only comparative measurements, e.g. odor abatement efficiency. 

HDN-Technik GmbH (Rednitzhembach, Germany), K. W. Hofmann information concerning odor abatement (gaseous systems) and waste air treatment and a photograph of a photoreactor. 

Tab. 8.6 Odor abatement (diminution of odor units, ou, c.f. Eq. 7-9) by photo-induced oxidation of waste air streams. For specification of the photoreactor, see Figure 8-21 (examples received from HDN-Technik GmbH, Rednitzhembach, Germany)...

Alany existing applications involve small adsorption systems for home and automobile applications, eg, refrigerant drying in automobile air conditioners, dual-pane window desiccants, medical oxygen systems, and muffler corrosion protection. Such small adsorption systems will continue to be developed for new uses in indoor air pollution and odor abatement and for the enhancement of the performance of other equipment and appliances. For example, adsorption-based control of the composition of air in refrigerators can provide improvements in the storage of fruits and vegetables. 

When unpleasant odors resulting from manufacturing processes or waste-disposal operations give rise to public complaints they should be identified and quantified prior to deriving methods of abatement. Such work is often innovative, requiring the design and fabrication of new equipment for the sampling and analysis of pollutants. 

The response of vertebrates to olfactory stimulation is affected by previous experience but behaviour can be specifically affected by odours (pheromones) (4). The olfactory system has been shown to detect specific components within complex mixtures and analytical chemistry techniques have been used to identify these active components (5). We have assessed the application of these methods to the problems of agricultural odours in an attempt to develop techniques applicable to both slurries and air samples. The identification of the odorous components might allow specific treatment methods to be developed. In addition, the designation of a range of indicator compounds might be useful in practice for monitoring abatement of odour nuisances. 

Abate A, Brenna E, Fuganti C, Gatti FG, SerraS, Odor and (bio) diversity Single enantiomers of chiral fragrant substances. Chemistry and Biodiversity 1 1888-1898, 2004. 

There have been limited field and controlled exposure studies that evaluated human reactions to carpet emissions. Winfield (1987) described a USA primary school where odor, headache, nausea, fatigue and mucosal irritation were reported by a high proportion of the students. Elevated indoor air concentrations of styrene (900-4000 xg m 3) were found, which were believed to be due to a SB R latex-backed carpet which had been installed several years previously. The carpet was removed and the ill-effects were reported to abate. Johnsen et al. (1990) exposed asthma sufferers to a foam rubber-backed carpet in a room chamber. While no clinical effects on lung function were observed, objective eye measurements found that there was a change in tear film quality. This was proposed to result from a degreasing effect of lipophilic VOCs, identified as toluene and acetone (Wolkoff, Nielsen and Hansen, 1990). 

TOperation for plume abatement only is not recommended, since this merely converts a visible hydrocarbon emission into an invisible one and frequently creates a new odor problem because of partial oxidation in the afterburner. 

ODORS PROM MEAL DRYER AND OIL DEODORIZATION—Odor is a qualitative parameter from the standpoint of both measurement and control. Motivation for abatement usually arises out of complaints of citizens residing nearby a facility. Sources of odor can be meal driers and rehned oil deodorization. Acidulation has been an odor producer in some isolated instances however, is most often because of basic poor design and operation usually coincident with batch processing in open-topped kettles. 

The highest profits for clinoptilolite seem to be achieved in the field of cat litter, animal bedding, and odor absorbents. With increasing environmental conscious applications in pollution abatement gain importance, in particular, if large amounts of ion exchanger or absorber are needed. The versatility of surface modified clinoptilolite is not fully explored yet. As the recent example of sorption [52,53] on the surfactant indicates, many other applications seem possible where the advantages of the porous bulk structure are combined with specific properties of well-chosen surfactants. 

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