Gas detection in wastewater treatment

Gas detection in wastewater treatment

Treatment of wastewater from municipal, industrial and agricultural facilities is necessary to transform it into a state suitable for discharge into water bodies, or for further use in closed water supply systems. The process involves removing harmful contaminants and pollutants from wastewater using physical, chemical, and biological treatment methods.

However on different stages, treatment process is accompanied by the presence of inert, toxic and explosive gases, namely:

Methane (CH4)

Flammable gas that forms during the initial stages of treatment (mainly sludge decomposition) and can accumulate near storage tanks and settling basins.

Hydrogen Sulfide (H2S)

Highly toxic gas that accumulates near tanks and settling basins. H2S may initially be present in water, or it may be formed as a result of treatment processes.

Oxygen (O2)

As a result of chemical and organic processes, the gases released can displace O2, resulting in its deficiency. Therefore, the level of Oxygen must be constantly maintained at a level safe for people (20.9%).

Chlorine (Cl2), Ozone (O3), Sulfur Dioxide (SO2), Ammonia (NH3)

Toxic gases that are used at the stage of water disinfection (removal of unpleasant odors and tastes).

Therefore, it is crucial to ensure detection of all gases emissions for:

  • safety of workers who maintain these facilities and are exposed to a variety of toxic gases on a daily basis
  • preventing explosions and fires at a facility
  • complying with regulatory requirements, depending on the country

To achieve all these goals, fixed gas detectors are installed in specific locations and continuously monitor the air for toxic and explosive gas levels. This allows employees to be alerted before concentrations exceed allowed levels so that safety measures can be taken without delay.

It is essential to choose reliable instruments to ensure maximum accuracy and effectiveness in detecting. Evikon MCI offers a wide range of models for this application, which you can find below.