Bulk odor

DeodoriZation. Removal of volatile odorous material and residual fatty acids is the final step ki ok processkig prior to packagkig or filling for bulk shipment (28). The ok is heated to 230—260°C under vacuum. Steam is passed through the ok to assist ki carrying over the volatile material. 

Anhydrous methylamiaes and ethylamiae are coasidered flammable gases. They are shipped uader pressure (239 —446 kPa, 20—50 psig) and are available ia bulk tank tmcks and railcars. Aqueous solutions of the methylamiaes and ethylamiae are coasidered flammable Hquids and are available ia dmms, bulk tank tmcks, and railcars. Most of the other higher amines are considered flammable or combustible Hquids. AH the lower alkylamiaes are also coasidered toxic and have strong odors. 

When designing sewer networks, particularly gravity sewers, reaeration is the major process that should be focused on to reduce sulfide formation and the formation of organic odorous substances (cf. Section 4.4). A number of hydraulic and systems characteristics can be managed to increase the reaeration rate and avoid or reduce sulfide-related problems. The hydraulic mean depth, the hydraulic radius, the wastewater flow velocity and the slope of the sewer pipe are, in this respect, important factors that are dealt with in Section 4.4. It should be stressed that it is not necessarily the objective to avoid sulfide formation (in the sewer biofilm), but the sulfide that occurs in the bulk water phase should be at a low concentration level. Therefore, the DO concentration in the bulk water phase should not be lower than about 0.2-0.5 g02 m-3, sufficiently high to oxidize sulfide before a considerable amount is emitted to the sewer atmosphere. 

Properties and handling. 1,4-butanediol is a colorless, oily liquid with a feint odor. It is miscible in water, ethanol, and acetone. BDO is not a skin irritant but it is toxic if you drink it. It is available as technical grade. There are no bulk shipping regulations. 

Properties and handling. MIBK is a colorless liquid and has a pleasant, almost fruity, odor. Unlike acetone and MEK, it is only slightly soluble in water. That happens to solvents as the size of the molecule gets larger. Most of the commercial trade in MIBK is in the technical grade (98.5%). Bulk shipments can be handled in conventional tank trucks and tank cars, but the hazardous material markings must be displayed. 

The static pile system is an intensive biotreatment because the pile of organic waste and bulking agent is intensively aerated using blowers and air diffusers. The pile is usually covered with compost to remove odor and to maintain high internal temperatures. The aerated static pile process typically takes 21 days, after which the compost is cured for another 30 days, dried, and screened to recycle the bulking agent. 

Greenisb-yeUow gas suffocating odor (odor threshold 3 ppm) gas density in the air 2.46 (air = 1) becomes a pale yellow liquid at -34.04°C the color decreases with lowering temperature becomes a pale yellow crystal at -101.5°C critical temperature 143.8°C critical pressure 76.89 atm critical volume 123 cm /mol moderately soluble in water solubility in water 0.061 mol Cb/L at 20°C bulk solubdity in water (including all species formed) 0.091 mol/L. 

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