Sewer gas Sewer gas Sewer gas is a complex mixture of toxic and nontoxic gases produced and collected in sewage systems by the decomposition of organic household or industrial wastes, typical components of sewage. Sewer gases may include hydrogen sulfide, ammonia, methane, esters, carbon monoxide, sulfur dioxide and nitrogen oxides. Improper disposal of petroleum products such as gasoline and mineral spirits contribute to sewer gas hazards. Sewer gases are of concern due to their odor, health effects, and potential for creating fire or explosions. Sewer gas is typically restricted from entering buildings through plumbing traps that create a water seal at potential
2014 Kaohsiung gas explosions and Kaisyuan Roads. Taiwan Area National Freeway Bureau also closed the northbound exit from Sun Yat-sen Freeway to Sanduo Road. However, Kaohsiung MRT and buses were not affected by the search and rescue works. To help the city in the rescue efforts, at 22:30 on Friday night the Taiwan Power Company (Taipower) shut down their four sets of generators fed with liquid natural gas, even though none of their pipelines had been damaged during the explosions. The shutdown lowered Taiwan's total electricity output by 1,100 MW, or about 2.7% of the total capacity. The decision to stop the supply was