TY - GEN
T1 - Removal of NPE's from neutral and acidic bleach filtrates by combining evaporation and precipitation
AU - Seisto, Anu
AU - Tomani, Per
AU - Järvinen, Risto
AU - Rasmuson, Åke
PY - 2000
Y1 - 2000
N2 - Bleach plant filtrates from Q (chelation) and D (chlorine dioxide) stages were treated for the removal of non-process elements (NPE's). The treatment included evaporation, precipitation and separation. More efficient NPE removal was obtained by applying the precipitation stage after rather than before evaporation. Depending on the requirements for NPE removal, concentration by evaporation at pH 6 may be sufficient for Q filtrate, as some NPE's precipitate during this treatment. Further reduction may be obtained by pH adjustment to 10. The D filtrate requires a precipitation stage after evaporation, or the filtrate may be evaporated at high pH (pH>10) in order to achieve efficient NPE removal.
AB - Bleach plant filtrates from Q (chelation) and D (chlorine dioxide) stages were treated for the removal of non-process elements (NPE's). The treatment included evaporation, precipitation and separation. More efficient NPE removal was obtained by applying the precipitation stage after rather than before evaporation. Depending on the requirements for NPE removal, concentration by evaporation at pH 6 may be sufficient for Q filtrate, as some NPE's precipitate during this treatment. Further reduction may be obtained by pH adjustment to 10. The D filtrate requires a precipitation stage after evaporation, or the filtrate may be evaporated at high pH (pH>10) in order to achieve efficient NPE removal.
UR - http://www.scopus.com/inward/record.url?scp=0034593322&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0034593322
SN - 1896742602
T3 - 2000 International Pulp Bleaching Conference: Oral Presentations
SP - 253
EP - 257
BT - 2000 International Pulp Bleaching Conference
T2 - 2000 International Pulp Bleaching Conference: Oral Presentations
Y2 - 27 June 2000 through 30 June 2000
ER -