WATER TREATMENT

When the sewage disposition plant deals with wastewater and sewage, due to a large number of microorganisms having effect on organics in the wastewater and sewage, the methane, hydrogen sulfide, ammonia and carbon dioxide and other gases are produced, but, of which methane and hydrogen sulfide are combusible gases. As the grills, bilchemical pool and regulating pool in the sewage treatment plant are generally closed buildings under ground, such combusive gases as methane and hydrogen sulfide will be filled with the building, whose electrical equipment is desiged into explosion-proof in accordance with "the environment of explosive gases".