Maintaining good air quality in a waste water treatment (wwt) plant is essential for operational efficiency and the safety of personnel.
Typical gases found in WWT are hydrogen sulphide, methane, ammonia, carbon monoxide and chlorine. Some facilities might also use ozone, chlorine dioxide or sodium hypochlorite with the chlorine during the sanitization process and sulphur dioxide is often used at the end to de-chlorinate the water.
To ensure the safety of the workers, equipment and facility, every area presenting a gas hazard should be monitored, including the gas storage rooms, ozone generator room and any room that gas passes through. In the larger, open areas, a fixed gas detection system is suitable; in confined spaces that operators enter and where gas may be present, portable gas detectors are more appropriate.
