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Project: Florida Landfill Odor Control Product Evaluation
Contractor: County Landfill Personnel
Engineer: Novozymes / Bi-Chem
Product Used: Odor Controller – an earlier version of ‘Odor Ranger’
Date: 2003

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.

Team Approach

Used A team consisting of the landfill foreman, storekeeper and operator developed a test protocol to meet a defined set of objectives.

1. Improved Odor Control
2. Application during working hours
3. Reduced cost of treatment
4. Less labor intensive application technique
5. Maintain Operator Safety than previously used

The team set up dilution tanks and spray equipment, devised spray patterns to address odor patterns and developed criteria to guarantee worker safety. The storekeeper contacted vendors for product recommendations, price quotes and recommended application rates and procedures. An odor panel was formed to assess the efficacy of each treatment. Testing was conducted at the end of August when temperatures were high and odor problems were most severe. Each of the five products selected for testing were tested for two days. A water cannon was used to spray down the active trash cells according to each manufacturers recommended dosage.

Test Results
The odor panel recorded odor approximately six to eight hours after initial application of fresh garbage. Early the following morning, the area was misted with a small volume of product, and a second odor test was conducted as noon on the second day. This procedure was followed until all five products were tested.

CRITERIA	ODOR RANGER *a	COMPETITIVE PRODUCT 1	COMPETITIVE PRODUCT 2	COMPETITIVE PRODUCT 3	COMPETITIVE PRODUCT 4
Dilution Ratio Volume/1000 gal.	25	5	30	5	2
MSDS: negative impact on people	No Serious Problem	No problem	Problems in open equip with Breathing	Skin irritant	No Serious Problem
Odor after 6-8 hour	Very Good	Good Fair	slight odor developing Fair	odor developing Poor –	very little control
Effect of misting Very good	Very good	Odor evident	Slight odor	Slight odor	Not to be mixed
Overall odor day 2	Slight odor	Strong odor	Strong odor	Strong odor	Strong odor

CONCLUSION AND SUMMARY:

Odor Ranger, through its earlier version called Odor Controller, provided superior odor control and was more cost effective than the other competitive products tested. A yearly program with ODOR RANGER provides the landfill with a 51% savings compared to prior year's expenditure on competitive technology that did not solve the problem. Odor Ranger traps the volatile odor compounds for immediate control. Degrades odor producing compounds for long term effectiveness. At dilution ratios of 2% to 6%, odor issues at many landfills can be handled effectively through application and misting.