Investigation of “skunk” odors and other emissions caused by cannabis production

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What is the exact cause of that “smell” odor emitted from a cannabis manufacturing facility? And what do these emissions mean for air quality, workers, and the general public?

You have to deal with these and others Knowledge gap The industry is still evolving, according to a new study led by Davi de Ferreyro Monticelli, a PhD student in Earth, Ocean and Atmospheric Sciences at the UBC. In this Q & A, he talks about what he lacks in knowledge about cannabis production and emissions, the potential impact on nearby communities, and how their scents overlap with other scents.

How do you measure odors? And why do you do this?

One way scientists measure odors is through “dynamic olfactory measurement” analysis. In this analysis, people take a sample of air near a known odor source and return it to the laboratory for training evaluators to sniff. The sample is first diluted with clean air and then further concentrated until half of the evaluation panel can smell it.When this happens, the dilution level is converted to smell concentration. This has been done in many industries and businesses, including cannabis facilities, waste and wastewater treatment, and livestock businesses.

The literature shows that about 1,700 facilities are growing Cannabis plant It can emit the same odor concentration as the operation of livestock raising about 30 pigs or about 1,600 chickens. Therefore, although their odors are not the same, one cannabis plant can be equivalent to about one chicken in terms of the intensity of the odor it produces.

To date, cannabis odors are associated with two classes of chemicals: terpenes and volatile sulfur compounds, which are volatile organic compounds. However, it is not really known which type contributes to the odor.By deepening understanding, with the industry Policy maker Controls the release of odors more effectively.

What else do you know about emissions from cannabis production facilities?

Our critical review has identified 16 major gaps that we believe the science, regulatory, and industry should address.They start with a measurement of Air quality Cannabis facility and its surroundings. Most of the released chemicals react rapidly in the atmosphere. Some of these can affect the formation of ultrafine particles and ozone in the troposphere, which is harmful to humans and the environment.The nature of the chemicals released during cannabis cultivation changes rapidly and should be used real time A sampling device that can capture changes in air composition in a short period of time to better understand the impact of cannabis facilities on overall air quality.

Creating and maintaining a database of different cannabis strains and their emissions will improve the accuracy of your cannabis cultivation emission inventory over time. Such an inventory provides the basic information needed at the beginning of an air quality assessment.

Why is it important to fill these knowledge gaps?

This is a relatively new industry and is growing as cannabis is legalized around the world.effective release With management practices Environmental policy Addressing the gaps identified in our review is the first step, which is necessary before new industrial practices take root.

We also considered measures that could go beyond regulation and bring innovation and benefits to the industry. For example, some studies claim that controlling environmental variables such as temperature, humidity, and concentrations of volatile organic compounds can increase the relative value of crops and standardize the chemical content of cannabis flowers.

Why cannabis smells bad

For more information:
Davi de Ferreyro Monticelli et al, Cannabis Cultivation Facilities: Review of their Air Quality Impacts from Occupational to Community Scale, Environmental science and technology (2022). DOI: 10.1021 / acs.est.1c06372

Quote: Https: // Caused by cannabis production (February 15, 2022) acquired on February 15, 2022. Investigation of “skunk” odors and other emissions

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Investigation of “skunk” odors and other emissions caused by cannabis production

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