锑在印染废水高比例循环利用过程中的富集

Accumulation of antimony in a high rate printing and dyeing wastewater recycling process

针对印染废水高比例循环利用过程中物质的积累问题,通过5 m^3·d^(-1)的中试试验系统,分析探讨了具有潜在毒性的难去除污染物锑在循环过程中的富集规律.研究结果表明,主要处理单元出水的锑浓度随着循环次数的增加呈现先增加后稳定的趋势,且在循环过程中总去除率约为40%.基于物料平衡原理,建立了关于二沉出水锑浓度的富集模型.通过对比发现,利用该模型所得到的模拟曲线与实测值具有良好的一致性,表明了该模型对于预测循环系统中的锑富集具有重要的意义.

With an objective of understanding pollutant accumulation in high-rate printing and dyeing wastewater recycling processes,a pilot scale experiment with the treatment of 5 m3·d-1 was conducted to evaluate the accumulation of antimony,which has potential toxicity in the wastewater.In the experiment,with increasing number of recycling,the concentration of antimony was increased first and then remained constant,with a total removal efficiency of around 40%. In addition,a mathematical model was proposed to simulate antimony accumulation in the WWTP effluent according to the mass balance. Through the comparative analysis,the simulated curve derived from the accumulation model agreed reasonably well with the experimental data,which indicated that the proposed model had great significance in predicting the antimony accumulation in the high rate printing and dyeing wastewater recycling process.