论文部分内容阅读
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 study the removal of high ammonia nitrogen content in micro-polluted water, an integrated high-concentration powdered activated carbon-ultrafiltration (HCPAC-UF) process was used to investigate the startup process of removing high ammonia nitrogen micro-polluted water. The results showed that the maximum removal rates of turbidity, UV254, TOC and NH3-N were 98%, 82.95%, 69.96% and 95%, respectively. The results of single UF filtration showed that turbidity, UV254, TOC and NH3-N removal rates were 94%, 18.48%, 8.12% and 4.08%, respectively. The system startup process takes 45 days, and the total nitrogen removal rate has been rising until about 70%. The decrease of NH3-N concentration, the increase of NO2 - N mass concentration and the increase of NO3 - N mass concentration did not occur at the same time, but the increase of NO2 - N mass concentration relative to NH3-N mass The decrease of concentration and the increase of NO3 - N concentration have some lag compared with the decrease of NO2 - N mass concentration. During the startup of HCPAC-UF system, the transmembrane pressure of the prefiltration membrane increased linearly and rapidly and the transmembrane pressure increased slowly later.