SETT VID ANAEROB RENING AV AVLOPPSVATTEN SETT VID ANAEROB RENING AV AVLOPPSVATTEN

摘要

The invention relates to a method of treating wastewater from closed manufacture of mechanical or chemi-mechanical cellulose pulp, which treatment is carried out in a hydrolysis and acid fermentation step and a methane fermentation step with subsequent sludge separation and recycling of separated sludge.