Odour and VOCs sampling

Odour and VOCs can emit from various sources: point sources, area sources, volume sources and fugitive sources. We can apply custom designed sampling equipment to determine both concentrations and emission rates: a portable wind tunnel system, isolation flux hood, sampling enclosure for open bed with outward flow, the DynaSampler for hot and wet sources.

For every sample, the sampling bag is rinsed by filling the bag with the odour sample and then squeezing the odour sample out of the bag using our custom designed odour sampling drum, the DynaDrum.

For the determination of emission rate, we take the readings of temperature, humidity and air velocity at the source. If necessary, the predilution of the sample is performed to reduce the moisture content in the bag.

A small capacity (5 litres) and thicker (25 microns) sampling bag (Nalophan TM) is used for odour sample collection and storage. The reduced sample volume is likely to reduce the sample losses through the sample storage. Furthermore, the predilution of the samples using Nitrogen gas can preserve the sample for extra long time if transportation is required.

For VOCs sampling, we will use different sampling approaches from wet chemistry, solid absorbent, to canister on the basis of the target compounds and analytical methods. With the use of the DynaSampler, we can extend our sampling capability to any kind of sources.

With more than 13 years experience in developing sampling equipment for the determination of odour and VOCs emission from various sources, we can collect odour and VOCs samples from the following industrial and agricultural sources:

• Sewage treatment plants
• Coal industry
• Mining industry
• Petroleum industry
• Aluminum refineries
• Oil and gas industry
• Compost processing and handling
• Solid waste handling and disposal
• Rendering plants
• Food processing plants
• Pig farms
• Chicken farms
• Turkey farms
• Cattle feedlots
• Dairy farms