Jätevesimädätteen poiskuljettaminen

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The procurement concerns the hauling of sewage sludge from the storage tank of a biorefinery owned by a company operating in the area of Metsäsairila Oy (Kiertotaloudenkatu 18, 50800 Mikkeli). To collect the sludge, a vacuum truck is required that, in terms of its emission classification, meets the Euro VI criteria. In the tender documents, an ad hoc file must be uploaded showing the basic information of the equipment to be used for providing the service (brand, year model, Euro classification, tank volume, number of axles, emissions). Sludge is an organic soil-improvement agent that meets the requirements set for it by the Finnish Food Authority (Ruokavirasto) for fertilizer use. The sludge has not been separated, and its dry matter content is approximately 11.5%. Sludge production is continuous, generating approximately 3,800–5,500 tonnes per year. The most recent product specification composed of samples taken at the end of 2025 has been added as an annex to this request for information. There is no newer product specification because, due to maintenance activities, the reactor has been out of production use during the past summer. Sludge is generated continuously, so…

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