• The retting water contains organic matter (BOD = biological oxygen demand) and should not be led out directly into rivers or lakes because the retting products that are still left in the water will be degraded by microorganisms, who use oxygen and make the water free from oxygen if there is too much degradable material. (diva-portal.org)
  • The literature study and constituent analysis showed that toxicity of the water to be treated, due to wood extractives and sulphur content, was of concern. (diva-portal.org)
  • It needs biological cleaning treatment (microorganisms who degrade the material under controlled circumstances). (diva-portal.org)
  • An analysis of a specific application of anaerobic wastewater treatment at a pulp and board mill, Stora Enso Skoghall, was carried out. (diva-portal.org)
  • The analysis consisted of a broad constituent analysis and an anaerobic treatment trial. (diva-portal.org)