HCPAC-UF组合工艺处理微污染水的启动试验

THE TEST FOR SLIGHTLY POLLUTED WATER IN HCPAC-UF COMBINATION PROCESS

为了对微污染水中高氨氮含量的去除进行研究,采用一体式高浓度粉末活性炭-超滤(HCPAC-UF)工艺,考察该工艺去除高氨氮微污染水的启动过程。结果表明,HCPAC-UF启动过程对浊度、UV254、TOC以及NH3-N的最高去除率分别可达98%、82.95%、69.96%和95%;而单独超滤膜过滤对浊度、UV254、TOC以及NH3-N去除率分别为94%、18.48%、8.12%、4.08%。系统启动过程需要45 d的时间,对总氮的去除率一直上升直到70%左右。出水NH3-N质量浓度的降低、NO2--N质量浓度的升高以及NO3--N质量浓度的升高不是同时出现的,而是NO2--N质量浓度的升高相对于NH3-N质量浓度的降低和NO3--N质量浓度的升高相对于NO2--N质量浓度的降低都有一定的滞后性。HCPAC-UF系统启动过程中,前期超滤膜跨膜压呈直线上升且上升速度很快,后期跨膜压上升速度明显减慢。

In order to removal high ammonia nitrogen of the slightly polluted water, it studied the role of high concentration powder activated carbon - ultrafiltration （HCPAC--UF） process to remove high ammonia nitrogen of slightly polluted water in start-up process. The results indicated that the removal rates of the integrated process for UV254,TOC and NH3-N can be 98% ,82.95% ,69.96% ,95%, respectively; but the removal rates of ultrafiltration membrane filter for them are 94%, 18.48%, 8.12% ,4.08%, respectively. The removal rate of total nitrogen in the system had been rising until about 70 percent. The time of the start-up process required 43 days. In the effluent of the system, the lower of the NH3-N concentration, the higher of the NOf-N concentration and the higher of the NOf-N concentration are not occurring simultaneously. The higher of the NO3-N concentration lags behind the lower of the NH3-N concentration and the higher of the NO3-N concentration lags behind the higher of the NO2-N concentration. In HCPAC - UF system startup process, ultrafiltration＇s membrane transmembrane pressure increases sharply and rose quickly in first four days, after the fourth day TMP＇s rising velocity slowed down considerably.