What is the characteristic smell of hydrogen sulfide?

The characteristic smell of hydrogen sulfide is often compared to that of rotten eggs due to its distinct and unpleasant odor. This gas is produced during the breakdown of organic matter in anaerobic conditions, such as in sewage, swamps, and certain industrial processes. The recognition of this smell is important in wastewater treatment, as it can indicate the presence of hydrogen sulfide, which can be hazardous to health and safety.

In many cases, the detection of this odor serves as a warning of its potential dangers, as hydrogen sulfide is toxic and can be present in areas where organic matter decomposes without sufficient oxygen. Understanding the odor is crucial for operators in wastewater treatment facilities as it helps in identifying issues that might require immediate attention to prevent hazardous conditions for workers and the environment.