COMMON ODOUR SOURCES: Know How To Spot Potential Odour Problems
Odour complaints are the second highest cause of environmental complaints, after noise. That is why, for operators, it is important to understand potential odour sources. If you recognise potential pitfalls, you can limit unexpected odour emissions. You can then manage your site in line with your regulatory obligations, and minimise complaints.
UNDERSTANDING ODOUR
Unpleasant odours can impact the health and well-being of those who live and work nearby. As a result, odour emissions are limited by law. Regulated industries are subject to odour limits, specified in their operating permits.
Odour occurs due to a mixture of chemical compounds in the air that we can smell. An odour may be considered a nuisance, depending on its frequency and intensity. There are many sources of odour, which we will explore in this article.
COMMON SOURCES OF ODOUR
In industrial settings, there are many potential sources of odour emissions. Often, these odours indicate underlying operational challenges. Understanding the origins of odour problems is essential. Doing so will help you maintain a safe, efficient and compliant site. Here, we explore some of the most common sources of industrial odours.
Volatile Organic Compounds
Volatile organic compounds (VOCs) cause odours which are detectable by humans. VOCs are released during some manufacturing processes. For example, during solvent use or in chemical reactions. There are several techniques to mitigate the impact of VOCs. Your choice will depend on your operation. Techniques include adsorption, chemical scrubbing and biofiltration.
Inadequate Ventilation Systems
Industrial sites should have effective ventilation systems in place. They should extract and disperse odours without causing a nuisance. If these systems are inadequate, you risk odours becoming problematic.
Improper Storage and Handling
Odour emissions can occur during improper storage and handling of raw materials. Review your procedures around exposed surface areas of raw materials. Also, look at stores, vehicle unloading and handling of putrescible materials. You can contain odours from these sources in several ways. For example, use covered process equipment, or lidded hoppers for raw materials. You can then duct the contained odour to abatement equipment. This will ensure it doesn’t escape the building.
Equipment Malfunctions
When equipment fails, it can cause problematic odours. For example, leaks in pipelines or tanks can cause the release of odour emissions. Implementing good monitoring and maintenance practices will help you avoid this scenario.
Building Leakage
Odour emissions often escape buildings from open or poorly sealed doors and windows. They can also escape from small holes that you may not even be aware of. You can take steps to ‘odour-proof’ buildings and containers. Ensure your building is well sealed. Also, consider emissions that occur during vehicle entry. Fast-acting doors and custom-made strip curtains can minimise emissions in this case. You will need to conduct careful testing to ensure your building is odour-proof.
Biological Processes
Biological processes can generate unpleasant odours. For example, the growth of mould or bacteria in moist environments. If you conduct these processes, ensure you understand the associated emissions.
ODOUR SOURCES BY INDUSTRY
ODOUR ASSESSMENT AND CONSULTATION
PREVENTING FUTURE ODOUR ISSUES
To keep on top of possible odour sources, you can take proactive steps. Firstly, identify all areas where there could be potential issues. Then, implement best practices to properly track and maintain processes and equipment. Make sure to consider the following:
Proper waste management
Ensure effective storage, handling, containment and disposal. Conduct regular cleaning and maintenance.
Install effective odour control systems
For example, chemical scrubbers or biofilters. Well-designed odour abatement equipment is also valuable.
Well-ventilated and sealed buildings
Smoke testing can help you keep track of how ‘odour-proof’ your buildings are.
