Jätevesimädätteen poiskuljettaminen

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The contract concerns the removal of sewage sludge digestate from the storage tank of a bioprocessing plant owned by the company operating in Metsäsairila Oy’s premises (Kiertotaloudenkatu 18, 50800 Mikkeli). To collect the digestate, a vacuum tanker is required that, according to its emission classification, meets the Euro VI criteria. A free-form file must be uploaded to the tender documents, showing the basic information of the equipment to be used for providing the service (brand, year of manufacture, Euro classification, tank capacity, number of axles, emissions). The digestate is an organic soil-improving material that meets the requirements set by the Finnish Food Authority (Ruokavirasto) for use as fertiliser. The digestate has not been separated, and its dry matter content is approximately 11.5%. Digestate production is continuous, producing approximately 3,800–5,500 tonnes per year. The most recent product specification, compiled from samples taken at the end of 2025, has been added as an annex to this request for information. A newer product specification does not exist because the reactor has been unavailable for production during the past summer due to maintenance…

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