LEHDER has a unique phased approach to odour investigations to ensure the problem is clearly understood and solutions are developed to address the root cause of the odorous emissions.  Specific situations require specific solutions.

Phase 1 - Assessment of odour issues

LEHDER personnel perform a qualitative evaluation at the facility over a period of several days.  The objective is to become familiar with the odor issue, evaluate potential factors contributing to off-site odors, and to identify a list of significant odor sources for subsequent sampling and modeling.

Phase 2 - Quantification of odour sources

During Phase 2, the sources identified in Phase 1 will be sampled and analyzed to determine the odor emission rate.  If appropriate, the emission rate of specific contaminants present in the discharge is determined.   Although the resolution of odor issues is seldom resolved through measurement of emissions of specific compounds, it provides credibility to a facility to be able to indicate knowledge of the emitted compounds.

Phase 3 - Odour impact analysis

The primary objectives of Phase 3 are to:

• evaluate the extent to which odorous emissions impinge on neighboring buildings located around the facility
• identify specific sources which contribute significantly to ground level odor concentrations
• provide recommendations for designing stack heights and velocities in order to provide maximum dispersion.

Phase 4 - Solution Development

The objective of Phase 4 is to identify practical, effective solutions. The information gathered during the first three phases is used, in conjunction with a control technology review, to develop odor abatement solutions.

LEHDER has developed effective solutions for organic chemical manufacturers, glass fiber plants, rendering plants, food processors etc.