HOW IT WORKS

METHODS OF GOC ODOR CONTROL

Compost Facility Captured air treated prior to exhaust

In general, GOC prefers atomization systems instead of fogging or misting due to the smaller size and lower weight of the atomized particles. The nozzles we recommend and sell expend less than 1 gallon of total fluid per hour at continuous operation. Some atomize only one half gallon per hour. There are certain situations which require high volume while retaining small particle size. We utilize special air powered nozzles with capacities up to 6 gallons per hour and more for these situations. We recommend low pressure hydraulic systems for outdoor use or use in very large indoor areas, and compressed air systems for indoor use in smaller applications, exhaust stacks, or in any situation where total introduced moisture is an issue.

Landfill Sprayer on compactor treats odorous gases at landfill

Control devices for these systems allow continuous or intermittent operation depending on the needs of the particular situation. Examples of situations for hydraulic systems include perimeters of landfills, the mixing or turning areas of compost sites, large transfer station floors, and feedlots. Examples of situations for compressed air systems include smaller transfer stations, pressing rooms in wastewater treatment plants and paper mills, garbage rooms or compactor areas in buildings and hotels, and even restrooms. In some applications, deodorization equipment may be attached to existing equipment and/or vehicles. This is especially true at landfill and compost sites.

Some situations offer very few alternatives other than air contact treatment. This may be for physical reasons, process reasons, or economic reasons. Other sites may be treatable in more than one way, or they may require a combination of treatments. In some situations, a perimeter air contact (atomization) system is installed as an emergency fall-back treatment for use only when other systems fail to contain odors or cannot keep up with odor generation. For example, a transfer station that normally utilizes topical treatment of the receiving floor and incoming wastes might maintain an atomizing system over doors or near a perimeter as an emergency measure in conditions of high heat and humidity, or when an extremely odorous load arrives.

SURFACE CONTACT

Compost Facility Topical application to bio-filter at composting facility

Once a surface application is completed, further control is unnecessary until new material is introduced or the surface area is agitated, turned, or otherwise disturbed. For example, a compost windrow treated topically would need additional treatment after or during turning because one of the functions of turning is to move the surface material into the interior of the row and to move the internal material to the surface. A new surface is created by this action and therefore a new treatment is necessary.

Topical treatment is a very effective method of controlling nuisance odors in landfills. Topical products are cost effective for large surface areas, and many landfills have water trucks on hand. Adding a water cannon or fire nozzle to these trucks converts them to an excellent system for application of topical products. Usually one or two applications per day (midday and closing) are sufficient to eliminate or contain most odors.

When treating liquid substrates such as holding ponds, manure lagoons, or leachate ponds, remember that strong winds creating a choppy surface will be constantly agitating and changing the surface materials. This makes these surfaces difficult if not impossible to treat topically without regular re-application. The same is true for ponds and lagoons utilizing aeration or bubbling systems. Such applications are far more suited to incorporation treatments.

INCORPORATION

Incorporation of BAT 506 into batch mixer at compost facility

In composting, methods such as static pile and aerated static pile are ideal for incorporation treatment. The products may be incorporated at the same time the various feedstocks are being mixed together. Incorporation is also ideal in digesters and lift stations in wastewater treatment, where a drip system or metering pump may be the only equipment needed.

GOC does not primarily develop or sell bacterial products. Some GOC incorporation products work by influencing the micro-biology of the decomposing wastes in the substrate. By delivering selected nutrients and oxygen-rich compounds, these products increase the presence of microbes producing non-odorous waste by-products while decreasing the presence of microbes which produce odorous by-products. This is accomplished by modifying the substrate such that it enhances and encourages bacterial proliferation. At Global Odor Control Technologies we believe the substrate must be modified to support desired microbial activity. Without a supportive substrate, the addition of bacteria directly will be a brief fix that must require continuous reapplication.

Other GOC products utilize chemical reactions such as saponification (a reaction in which animal or vegetable fats, oils, and grease are converted to soaps) to eliminate the compounds which facilitate odor formation.

GOC incorporation products are extremely cost effective and represent excellent alternatives to the more conventional methods of air and surface contact.

Major examples of each method may be found in the applications section of this site. The advantages and disadvantages of each method are outlined in the table below.