Arduino Uno Driven Toxic Gas Monitoring and Alert System Within Sewage

Air quality degradation due to the release of toxic gases in the drainage system and sewage areas or septic tanks has led to the number of accidents increasing day by day. The manual scavengers risk their lives every day and die due to infections and diseases like fibrosis, lung cancer, typhoid, hepatitis, asthma, etc. caused by more prolonged exposure to hazardous gases. Gases like hydrogen Sulphide (H2S), Carbon Monoxide (CO), Methane (CH4), Ammonia (NH3), Sulphur Dioxide (SO2), etc. are released through the toxic waste produced due to the natural decomposition of the organic and inorganic wastes. These gases also lead to adverse effects on the central nervous system and immunity system. Some gases like hydrogen sulphide and methane are highly flammable and higher concentration of these gases can be explosive. Higher concentration of carbon monoxide in human body results in fatigue, headache, dizziness, and sometimes led to suffocation. Therefore, monitoring of the released toxic gases is important in such vulnerable areas for safeguarding the lives of workers. In this work, efforts have been made to design a system which can monitor toxic gasses released in the sewage and can also give alert signal if the quantity of any such gases is found to be greater than the hazard limit.