Paper production unit comprises a treatment unit connected to a paper machine, and a cleansing and/or material recovery unit

摘要

An arrangement for producing paper from e.g. old paper, comprises a treatment unit (100) connected to a paper machine (200). The treatment unit has one or more stages supplied with process water. Each process water treatment unit has a cleansing and/or material recovery unit, and at least one treatment unit has an anaerobic reactor with micro-organisms, as well as a scale elimination unit. At least one of the treatment units has a particle separation section for eliminating colloidal, colloidaly dissolved and particulate material, as well as a desalination unit. The scale elimination unit is in the form of a flotation plant.