STUDY OF ABSORBABLE ORGANIC CHLORIDE IN BAMBOO PULP BLEACHING WASTEWATER

The AOX formation in one stage bamboo pulp chlorinated bleaching wastewater and in oxygen delingnifcation-chlorinated stage bleaching wastewater was studied. The results showed that the AOX amount in both hypochlorite one stage and oxygen delignifcation- sodium hypochlorite stage bleaching wastewater was increased with the increase use of active chlorine under the same kappa number. The tendency of AOX generation in the chlorine dioxide bleaching was similar to that in the hypochlorite bleaching, but was dominant. The bamboo pulp could reach 84%ISO after both OHMP and ODP bleaching stage and the AOX amount in both stage could meet the AOX let out standard. GC-MS was used to detect the component of AOX in the bleaching wastewater. The result illuminated that the effluent was constituted by benzene and its derivative, phenol and its derivative, alkyl and its derivative. The kind of chlorinated organic compounds in the one stage chlorinated bleaching wastewater was more than oxygen delingnifcation-chlorinate stage.