What is the primary reason for providing ventilation in wastewater collection systems?

The primary reason for providing ventilation in wastewater collection systems is to prevent the buildup of dangerous and flammable gases, specifically methane (CH₄) and hydrogen sulfide (H₂S). Wastewater collection systems, which include sewer pipes, manholes, and lift stations, are anaerobic environments. Anaerobic conditions mean there's little to no oxygen. In the absence of oxygen, microorganisms called anaerobic bacteria break down organic matter in the wastewater. This decomposition process produces a variety of gases, with methane and hydrogen sulfide be....