采用预处理-微滤(MF)-反渗透(RO)双膜技术深度处理印染废水.通过改变废水的温度、pH值、回用率和RO的操作压力,探讨其对CODCr去除率、脱盐效果的影响及原因.试验表明:最佳运行工况是操作压力为1.8 Mpa、水温为35℃、pH值为6.0～ 10.0、回收率为80％；此条件下,双膜法对CODCr的去除率和脱盐率分别达到97.4％和97.2％,浊度去除率接近100％,出水水质满足印染工艺回用要求.%MF-RO was used for the advanced treatment of the printing and dyeing wastewater after pre-treatment. Through changing the temperature, pH value, recycle rate and operating pressure of reverse osmosis, how and why those related factors affected the removal rate of CODCr and desalination effect were discussed and analyzed. The results of the test showed that, the optimal operating condition was: the pressure was 1.8 Mpa, the water temperature was 35℃, the pH value was 6.0 - 10.0, and the recovery rate was 80%. Under the above condition, the removal rates of CODCr and salinity reached 97.4% and 97.2% respectively, the removal rate of turbidity was close to 100%, the effluent water quality could meet the requirement for the process of printing and dyeing.
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