辐射处理造纸制浆筛选漂白废水

Electron beam radiation treatment of pulp bleaching effluent

介绍了电子束(EB)辐照制浆造纸厂废水,降解废水中未被生物降解的有害化学物质。生物处理后的废水经电子束辐照后,10min之内化学需氧量(CODcr)就可降低至原值的1/4,色度也随之降低。经对废水中重要成分单宁酸辐照后的光谱分析,发现分子结构中的C=O、C=C键发生断裂,有机物被很好地降解,达到了废水处理的目的。

There are very high values of the chemical oxidation demand (COD) in the effluent from pulp mills. The COD value of the effluent is still higher after traditional biological treatment. The biologically treated wastewater from pulp mill was irradiated using low energy EB. For the wastewater irradiated with a dose of less than 1kGy, its COD value was reduced to 1/4 of the value for unirradiated wastewater. Chromaticity of the irradiated-wastewater was also greatly decreased. The UV-visible spectra of a significant constituent of the wastewater indicated that the contaminants were degradated well.