DIN CEN/TR 16394*DIN SPEC 19518:2015-10

Fresh sludges are unsuitable for circulation of samples for interlaboratory trials. The circulation of analysts is needed for standards validation dealing with physical properties of sludges.For purposes of comparison and reproductibility, it would be useful to have a European reference for organic synthetic suspension. Elaborating such a standard aims at having an alternative to fresh sludges because: - Sludge characteristics change with storage time; - Sludge characteristics are strongly affected by transport and handling; - Fresh sludges require particular precautions and authorization for transportation. Aerobic sludge first targeted; potentially: anaerobic sludges, physico-chemical sludges, water supply treatment sludges; potentially inorganic sludges (sediments).