Landfills are a necessary part of modern society. But not only do they look unsightly and produce an unpleasant odour, they can also be a significant source of emissions. As organic waste decomposes in landfills, it releases methane – a potent greenhouse gas that is more than 25 times as effective as carbon dioxide at trapping heat in the atmosphere. To mitigate these emissions, many landfills are now equipped with landfill gas collection and treatment systems. However, to ensure the safety of workers and the surrounding environment, it’s crucial to monitor landfill gas levels using a landfill gas detector.
What is a landfill gas detector?
A landfill gas detector is a device used to electronically measure the concentration of gases such as methane, carbon dioxide and oxygen in and around a landfill. It’s important that operators can understand the breakdown of gases to ensure the correct levels and measure the volume of harmful gases. These devices are essential for ensuring the safety of workers and preventing the release of hazardous gases into the atmosphere.
Portable landfill gas detectors
Landfill gas detectors are often portable devices that can be carried by workers as they move around a site. These devices give operators more flexibility. They’re lightweight and easy to use, making them ideal for use in harsh and unpredictable environments.
Fixed landfill gas detectors
Fixed in line systems are permanently installed on-site. They measure multiple sample points and are connected to industry standard protocols so the operators can control the system.
Why is landfill gas monitoring important?
Landfill gas monitoring is vital for several reasons. Firstly, landfill gas is highly flammable. If it reaches a certain concentration, it can pose a significant risk of explosion or fire. Secondly, the release of methane from landfills is a major contributor to greenhouse gas emissions, which are a leading cause of climate change. By monitoring landfill gas levels, operators can identify areas where emissions are particularly high and take steps to reduce them. Finally, landfill gas can contain other hazardous substances, such as hydrogen sulphide, that when released into the surrounding environment, can be harmful humans.
How do landfill gas detectors work?
Landfill gas detectors work by measuring the concentration of gases in the air using a sensor. The most common type is a catalytic sensor. These detect the presence of flammable gases, such as methane and propane by checking the temperature difference between two bead sensors. Infrared sensors monitor the absorption of infrared radiation, at specific wavelengths, to detect the presence of carbon dioxide. Some landfill gas detectors also have the ability to measure the concentration of oxygen in the air. A low oxygen concentration can indicate the presence of other hazardous substances.
The sensors in landfill gas detectors are very sensitive and can detect very low levels of gas. They are also designed to be highly durable and resistant to harsh environmental conditions, such as increased humidity and temperature fluctuations. Most landfill gas detectors are battery-powered and have an inbuilt alarm which sounds when gas levels reach a certain threshold. This allows workers to take immediate action to address the issue and prevent any potential hazards.
Choosing the right landfill gas detector
Choosing the right landfill gas detector depends on several factors, including the type of gases being monitored, the size of the landfill and the specific needs of the operator. When selecting a detector, it’s essential to consider the sensitivity of the sensor, the durability of the device and the ease of use. It’s also important to make sure that the detector is certified for use in hazardous environments and meets any relevant safety standards.
Benefits of landfill gas monitoring
The benefits of landfill gas monitoring are numerous. By identifying areas where gas emissions are particularly high, operators can take steps to reduce these emissions, such as improving gas collection and treatment systems. This not only reduces the environmental impact of landfills but also improves worker safety by reducing the risk of fire and explosion. By continuously monitoring landfill gas levels, operators can ensure compliance with regulatory standards and avoid potential fines or legal action.
Conclusion
Landfill gas monitoring is essential for ensuring the safety of workers and preventing the release of hazardous gases into the atmosphere. Effective use of landfill gas detectors also helps operators comply with regulatory standards, reduces the environmental impact of landfills and mitigates the effects of climate change. Investing in the right, good quality technology has an initial cost but they’re a crucial piece of equipment that should be present in every landfill site.