In the sewage treatment plant, its water treatment facilities include regulating pool, acid and alkali pool, gel pool, sedimentation tank, aeration tank, dosing cans, pumps, sludge dewatering and control systems. The whole process will produce a large number of dangerous gases, according to the different ways of harm, they can be divided into toxic gases (asphyxiating gas), flammable and explosive gas two broad categories. - Dangerous gases and hazards -
1, toxic gas, represented by hydrogen sulfide. Hydrogen sulfide is an inorganic compound of formula H₂S. Under normal circumstances is a colorless, flammable acid gas, with a low concentration of stench, odor, such as stinky eggs; at high concentrations but without smell (because of high concentrations of hydrogen sulfide can paralyze the olfactory nerve) Hydrogen sulfide is an acute Very toxic, inhaled a small amount of high concentrations of hydrogen sulfide can be fatal in a short time. Low concentrations of hydrogen sulfide on the eyes, respiratory and central nervous have an impact. Under normal circumstances the sewage treatment process for the inspection operations, the chance of exposure to hydrogen sulfide is very small, but in the case of non-normal production, stirred in a small space sludge, sewage, local hydrogen sulfide concentration can be too high, when Occupational workers do not pay attention to personal protection, there may be acute hydrogen sulfide poisoning or even deaths.
2, flammable and explosive gases, the sewage treatment plant sewage contains a large number of microorganisms, sewage treatment plants will produce biogas, mainly in the secondary treatment processes, such as aeration and sludge digestion, where biogas production is usually High-risk area. The main component of biogas is methane. Methane not only explodes, but it can also cause suffocation as the oxygen concentration decreases. Moreover, if it leaks out of the digester, it can be very dangerous and is likely to cause an explosion.
In summary, the sewage treatment plants are generally detected gas flammable gas and hydrogen sulfide two kinds of gas, as to choose which product depends on customer needs, the current products are portable and fixed two categories, can be used In the sewage treatment plant testing. This is a portable ammonia and hydrogen sulfide, used in sewage treatment plants to detect toxic gas concentrations, mainly at any time to monitor, carry, built-in rechargeable lithium battery. Stand by 10 hours or so.