H2S detection solution in malodorous gas

1. What is malodorous gas?       With the continuous and rapid economic development and the continuous improvement of urbanization level, China’s industry, agriculture, commerce and other undertakings have developed rapidly, especially the introduction of some new chemical synthetic products such as food, chemical industry, pharmaceutical industry, and the construction of urban infrastructure such as urban sewage treatment plants and garbage disposal sites. As one of the seven major environmental hazards in the world, malodorous pollution incidents have caused more and more disputes and cases in society.       All gaseous substances that stimulate the olfactory organs and cause people to feel uncomfortable and damage the living environment are called malodorous gases. Malodorous gases are mainly composed of ammonia, sulfide and methanol. They can be roughly divided into 5 categories: sulfur-containing compounds (such as hydrogen sulfide, thiols, thioethers); chlorine-containing compounds (such as amines, amides, indoles); halogens and derivatives (such as Cl2 , halogenated hydrocarbons); hydrocarbons (such as alkanes, alkenes, alkynes, aromatic hydrocarbons); oxygen-containing organic matter (such as alcohols, phenols, aldehydes, ketones, organic acids, etc.).
2. Sources and hazards of foul-smelling gases
Malodorous gases mainly come from industrial and agricultural production departments and people’s lives. For example, feces, fish, corruption, rotten fruit, and wild vegetable odors produced in agricultural and animal husbandry production and processing. Sulfides, hydrocarbons, aldehydes, ketones, benzenes, phenols, amines, tar, asphalt vapor, ammonia and various organic solvents produced in the petrochemical production process, as well as odors from urban public facilities. High concentrations of odor pollutants are directly harmful to human health. According to the national “Emission Standards for Odor Pollutants (GB14554-1993)”, the substances that control odors only include nine indicators including ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide, styrene, and odor OU value.
3. Recommended H2S gas detection solutions for malodors
At present, Shenzhen Xinshilian Technology Co., Ltd. recommends a four-electrode electrochemical sensor H2S-B4 to detect hydrogen sulfide in odorous gases. This sensor has the characteristics of fast response speed, strong anti-interference, high resolution, good linearity, and wide working range. The following are some parameters of H2S-B4: