Control odor removal

Other. 2-Nitro-1-butanol is an excellent solvent for many polyamide resins, cellulose acetate butyrate, and ethylceUulose. It can be utilized in paint removers for epoxy-based coatings. 2-Hydroxymethyl-2-nitro-l,3-propanediol is usebil for control of odors in chemical toilets. Its slow release of formaldehyde ensures prolonged action to control odor, and there is no reodorant problem which sometimes is associated with the use of free formaldehyde. 2-Hydroxymethyl-2-nitro-l,3-propanediol solutions are effective preservative and embalming fluids. The slow Uberation of formaldehyde permits thorough penetration of the tissues before hardening. 

Other industries of interest are (1) the manufacturing of spices and flavorings, which may use activated carbon filters to remove odors from their exhaust stream (2) the tanning industry, which uses afterburners or activated carbon for odor removal and wet scrubbers for dust removal and (3) glue and rendering plants, which utilize sodium hypochlorite scrubbers or afterburners to control odorous emissions. 

Odor evaluation, in perfumes, 18 379 Odor impacts, air pollution dispersion modeling for, 26 725 Odorous compounds controlling, 10 75 in wastewater, 26 723t Odor panels, 26 724 Odor pollution, 26 669 Odor removal, adsorbents for, 1 611 Odors... 

As such, it is used in water treatment to control taste and odors, remove color, and control biological growth. It promotes the removal of iron and manganese species by rendering them insoluble through oxidation ... 

In addition to disinfection, ozone has been used in municipal wastewater treatment to enhance biodegradability of recalcitrant organic chemicals, control odor, improve suspended solids removal, improve the performance of granular activated carbon, and condition sludge. ... 

Biofiltration can be used to remove volatile organic compounds, including odors, from waste air.295 Pseudomonas spp. can remove toluene, and Bacillus spp., ethanol. The process is suitable for use on food-processing plants, public treatment works, and others, to control odors. The cost can be quite a bit lower than that of incineration or adsorption on carbon. A biofilter with Nitrosomonas eu ropaea immobilized in calcium alginate removed 97.5% of ammonia from air.296... 

Chemical oxidants that are commonly used to disinfect, control taste and odor, remove color, and/or provide microfiocculation, include free chlorine (HOCl/OCL), mono chloramine (MCA), chlorine dioxide (CIO2), permanganate (Mn04 ), and ozone (O3). Although the relative reactivity of these compounds varies greatly, very few studies have comprehensively examined their reactivity with transformation products. One comprehensive study showed that the relative reactivity of pesticides with these oxidants was, on average (Adams et al. 2007)... 

We adapted a procedure used by Mackay-Sim and Laing (1981a). Fifteen min after the foot-shock administration, blood from stressed animals was collected in a heparinized watch glass. Control odor blood was collected from donors immediately following removal from the home cage. 

Because of their suitability for disinfection and oxidation (e.g., taste and odor control, micropollutant removal), chemical oxidants are commonly used in water treatment processes. In drinking water treatment systems, the oxidants coimnonly used are chlorine, chlorine dioxide, chloramines, and ozone. 

Sodium chlorite has also been used for treatment and removal of toxic and odorous gases such as hydrogen sulfide and mercaptans. Chlorine dioxide from chlorite is also useful for microbial and slime control in paper mills and alkaline paper machine systems (164,165). The use of sodium chlorite in textile bleaching and stripping is well known. Cotton is not degraded by sodium chlorite because the oxidation reactions are specific for the hemiceUulose and lignin components of the fibers. 

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