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中文摘要：
对不同封闭程度的两个同类废纸造纸厂进行了调查研究。根据系统封闭后循环水中污染物质的积累状况选出7个有代表性的限制性水质参数，即TDS、CS、UVDCS、电导率、COD1、CD和CODcol，进一步对它们进行相关性分析，结果发现，CS与UVDSC、TDS与电导率、TDS与阳离子需求量、UVDCS与COD1及电导率与阳离子需求量之间相关性显著，相关系数均在0．85以上。选择不重叠表征污染物质的限制性水质参数进行组合，从表征循环水中有害物质含量的角度分析，确定了COD1、CS、TDS作为最佳限制性水质参数组合，这组参数能较全面地反映造纸过程中循环水的水质状态。根据回归方程用UVDCS和电导率分别对循环水CS和TDS含量进行预测，预测结果与实测值误差大都在20％以内。鉴于UVDCS和电导率测量简便，COD1、UVDCS和电导率组合可用于水质在线监控．
英文摘要：
Representative water quality parameters selection can provide scientific basis for monitoring the safe running of industrial water recycling. This paper investigated two recycled fiber mills with different closure degrees in Xi＇ an. According to the degree of pollutants accumulation in recycling water after closure, seven parameters TDS, CS, UVDCS, conductivity, COD1, and cationic demand, CODcol are selected and analyzed their correlation, the results revealed that CS and UVdcs, TDS and electrical conductivity, TDS and cationic demand, UVdcs and COD1, electrical conductivity and cationic demand were highly correlated; the correlation coefficients were all above 0.85. Combining those not overlap restrictive water quality parameters, restrictive water quality parameter combination COD1 , CS, TDS was determined as the optimum restrictive water quality parameters in term of indicating the pollutant content in the recycling water. CS and TDS contents of recycling water were predicted by UVdcs and electrical conductivity based on the regression equation. The errors of most prediction results were within 20%. Because UVdcs and electrical conductivity are easy to measure, combination of COD1, UVdcs and electrical conductivity can be used for on-line monitoring of recyclingawater quality.
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