GHK is a public company with the objective to treat the solid waste of Gipuzkoa. GHK as a public developer leads the construction of a plant for the treatment of Municipal and analogous Solid Waste, including a pretreatment installation for biodrying (200,000 tons/year) and a waste to energy plant (240,000 tons/year). This MBT plant wants to obtain a reduction of waste of 27%, and more energy from waste heat. The WTE plant will process biodried and non-hazardous industrial waste through 2 lines of 16 tons/hour. A royal decree also demands smoke treatment. Supporting facilities contain the treatment and valorisation of ashes and the recycling of metals.