This railway yard is located next to Renova's waste-fuelled district heating power plant in Sävenäs. It's one of the world's most advanced facilities for the incineration of waste, according to their homepage. It produces heating for large parts of Gothenburg. The train cars most likely contains waste materials to be burnt in the plant.
The image is a HDR constructed of 7 exposures, with an added vintage sepia effect. The first HDR I've made with my GX1.