Combined VOCs and odor monitoring for odor and chemical control units

Jon Lawson

When odor issues occur at an industrial site, rapid diagnosis must be done to define the best source treatment strategy. Manual sampling techniques can lead to problems during sampling and transport to the laboratory for analysis. Therefore, there is a need for online analyzers to monitor odors constituents such as methane and non-methane Volatile Organic Compounds (VOCs). Online monitoring of methane (CH4) and Non-Methane Total Hydrocarbons (THC) with an all-in-one solution allow accurate and fastest results.

The fully automatic, wall-mounted instrument to be presented consists in an automated Gas Chromatograph (GC) with Flame Ionization Detection (FID): chromaTHC. It provides the ability to quantify CH4 and nmTHC (with THC by sum) concentrations from ppb to ppm within only 2 minutes and without matrix effects.

Designed for odor and chemical control units, it includes a built-in computer and zero air and hydrogen generators. The measurement system performance evaluation is completed using the internal calibration with a permeation tube to provide automatic data validation. Additionally, a 3G/4G MODEM is available for data transmission and automatic alarm by SMS function to inform user and provider when media support (charcoal or bio filters) is saturated and needs to be replaced.

This fully automatic user-friendly system does not require specialized people to operate. The high quality of the information is assured without the need for verification by an expert.

Chromatotec