What gases are commonly found in sewers?

The presence of H₂S (hydrogen sulfide) and CO₂ (carbon dioxide) in sewers is a significant concern in wastewater management. H₂S is a toxic gas that is produced during the anaerobic decomposition of organic matter in sewage systems. This gas poses health risks to workers and can cause corrosion in sewer infrastructure. CO₂ is also commonly found in sewers and is released as a byproduct of microbial activity during the breakdown of organic material.

Understanding the composition of gases in sewers is crucial for proper ventilation, safety measures, and the design of wastewater treatment systems. In a well-managed sewer system, monitoring and controlling these gases is vital to ensure both the safety of personnel and the efficiency of operations.