COMPARISON OF ECF-LIGHT, TCF AND CEH BLEACHING OF NON-WOOD FIBRES

编号 zgly0000332953

文献类型 期刊论文

文献题名 COMPARISON OF ECF-LIGHT, TCF AND CEH BLEACHING OF NON-WOOD FIBRES

学科分类 220.5570;林产化学加工学

作者 ThomasGreschik  JiriBasta  ChristianBlom  HuaiyuZhan  BingyunLi  ChenrongQin 

作者单位 EkaChemicalsAB 

母体文献 天津科技大学学报 

年卷期 2004,19(A02)

页码 310-316

年份 2004 

分类号 TS745 

关键词 非木纤维  漂白  环境保护  ECF  TCF  CEH  造纸业 

文摘内容 A comparative evaluation of DQP, OQP and CEH bleaching of non-wood fibres has revealed that wheat straw, reed, bagasse and bamboo pulps can be bleached to brightness levels of just above 80% ISO, when applying an OQP bleaching sequence and to brightness levels of about 85% ISO when applying the DQP sequence using 10-15 kg/tp of C1O2 (aC1.), 15-20 kg/tp of H2O2 together with 1-2 kg/tp of EDTA. The P.C. numbers of the DQP and OQP bleached pulps are much lower and the viscosity much higher than those of the CEH bleached pulps. Compared with CEH pulps, both the DQP and OQP pulps had better strength properties, particularly Tear Index. In spite of their higher final brightness levels, the DQP pulps show similar or better strength properties than the OQP pulps. A comparison of the CEH and DQP effluents showed that the DQP bleaching could reduce the pollution load (CODco,BOD5, SS) by 35 to 60% without the need for recirculation of any effluent streams. The AOX levels could be reduced by 87 to 93%。