Solution to death of manual scavengers in septic tank system due to Asphyxiation

In India, people those who rely on septic tank system are facing so many problems. It is necessary to avoid abnormality in septic tank and more importantly the death of manual scavengers due to toxic gas such as hydrogen   sulfide exposure (asphyxiation) which is a byproduct of anaerobic bacteria present inside the septic tank. If the tank is not pumped out at a regular interval then anaerobic bacteria can pass from septic tank to drain field through fluid and cause septic tank failure. Our unique solution can able to overcome the above problems by fixing the toxic gas sensor inside the septic tank system which will collects data at regular intervals and compares its value to the permissible exposure limit (PEL) - value to say as toxic.  10 ppm is the PEL (8 hour time-weighted average). 10–20 ppm is the borderline concentration for eye irritation (credit: Wikipedia). If the toxic gases are going beyond permissible exposure limit (PEL) then, the controller will send notification to the user/concerned officials of public work department to clean the septic tank system. By doing this it is possible to prevent septic tank problems and also it is possible to avoid clogged drain field and in worse condition even back-ups. Once the values of toxic gases are nearer to the permissible exposure limit, our system will automatically add salt and bleaching powder mixture into the septic tank system by rotating the servo motor connected to the valve.  So our system will not only give the notification to the user/public work department, it will also try to decrease the density of toxic gases inside the septic tank.