The desulphurised gas is then pumped off site via a pipeline for sale to industrial users. After a period of time, the iron oxide becomes saturated and is removed from the boxes and disposed of to landfill.

• 经除硫化氢处理的煤气用泵经管道输送、出售给工业用户。一段时间后,氧化铁会被饱和,必须从盒子中取出并扔到垃圾堆上。