County landfill personnel at a Florida landfill conducted a pilot study with five competitive products to determine if they could improve the effectiveness of an on-going odor control program. Odors are generated throughout areas receiving the trash and are especially bad during wet weather due to wet soil covers and standing puddles. A more effective means of control was necessary to satisfy neighboring property owners. Closed trash cells use gas burners to oxidize methane and other gases, eliminating odor problems from these areas.more...
Report: Effective Odor Control Part 3
Odor Neutralizers:
Odor Neutralizers are chemistries using oxidizers and ot her chemistries that react in some cases with the alkaline odors and in other cases with strong acid odors.
The alkaline odorous compounds include Ammonia, Butylamine, Trimethylamine, and other Amines, Skatole and other compounds of a similar nature. These odors are typically associated with chemical and industrial processing their wastes, putrecible waste (household garbage), sewage treatment plants, and extended reticulation systems, animal breeding and processing facilities. By spraying, Odor Lieutenant , one of NWC’s Odor Neutralizing Infantry Combatants, on a timed programmed basis all odours Odor can be eliminated. The neutralizers are effective against these alkaline compounds because their toxic and offensive potential is neutralized by the following reaction: NH3 (ammonia) + NWC’s Odor Neutralizing Infantry Combatant =
CH3COONH4 (amine salt) or RCH2CONH4.
The strong acid odors are mainly Hydrogen Sulfide, Methyl Mercaptan, and other gases associated with sewage and fatty wastes. Odor Corporal, one of NWC’s Odor Neutralizing Infantry Combatants, has added to it an emulsifying agent which helps with the dispersion of oil and reduces fat build up on a plant and machinery, reducing maintenance costs and prolongs equipment life. Odor Corporal can neutralize hydrogen sulfides by the following reaction: H2SO (hydrogen sulfide) + Odor Corporal = RNH3SH (amine-bisulphide salt). Odor Corporal has been used also to neutralize hydrocarbon odors such Benzene, Toluene, Ethylbenzene, Xylene, Naphthalene and polycyclic aromatic hydrocarbons.
Odor Sergeant, another member of NWC’s Odor Neutralizing Infantry Combatants, contains highly effective odor neutralizing chemistry that can has been attested to last several days and provide a deterent to birds attacking the waste streams causing the odors. In a transfer station, th e neutralization process is very effective using the NWC SWAT misting equipment.
NWC’s Odor Neutralizing Infantry Combatants are different from nearly all other neutralizers and masking agents because they are made from food and cosmetic grade compounds and contain only 1% essential oils or plant extracts (by total volume of concentrate), as opposed to the other neutralizers on the market which are generally a blend of essential oils and plant extracts combined with a standard surfactant. Basic chemistry proves all essential oil and plant extract based products cannot truly neutralize odors. They can only mask them or encapsulate them for a period before releasing them again. Essential oils and plant extracts cannot bind to and react with, a compound such as H2S and the structure of that volatile compound into a non-volatile compound.
Odor maskants:
Odor Masking is a substitution of one odor for another. This is typically placing a fruit odor over a current bad odor that might be coming from the waste. Odor maskants typically mix odors but the net result can be a combined fragrance that is not pleasant to smell.
Cover Materials: NWC cover materials (ProGuard, ConCover SW and ConCover 180) are all proven suppressors of VOC’s and Odors in sludge ponds and landfills. Independent laboratory testing has shown that the NWC product line do a better job of controlling odor and suppressing VOC’s then soil. They are significantly better then using tarps that generally create a pluming odor effect when the tarps are removed from the top of the contaminated sediment. With NWC’s cover materials there is no need to remove the material after it is sprayed over the odor producing contaminated sediments.
The NWC cover materials work largely by creating a polymeric film over the surface of the contaminated sediment that restricts evaporation and odors from rising from the surface of the contaminated sediment. Moisture and the leaching of the liquids is not an issue for the NWC cover products because NWC’s products can pass the paint filter test which means that once the NWC cover materials are fully mixed, no free liquids will pass through a paint filter thus eliminating any concern that contaminated sediments can be adversely effected by water which is a major component of the NWC material. To this extent NWC’s cover materials were selected as a heavy use dust control material for construction roads on a major US Navy perchlorate remediation project. This non-leaching was a major component of the EPA decision to allow the use of the NWC Cover material.
NWC’s cover materials have been subjected to tight air monitoring by USEPA regulatory agencies on projects where the VOC’s are extremely hazardous to human health. When selecting how you should control odors, see our sales technicians to help you decide how you should proceed.return to main page....
