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制备了改性PSF超滤膜,研究了原膜、改性膜分别与混凝工艺组合处理赣江微污染水源水的处理效果。研究表明,组合工艺处理浊度时,两膜的处理效果都比较明显,PAC的加入量对其影响较小。对UV_(254)、氨氮进行处理时,改性膜的处理效果均比原膜好。加入40 mg/L的PAC时,两膜对UV_(254)的去除率达最大值,其中原膜为39.52%,改性膜为58.73%。在PAC的投入量由10 mg/L增至30 mg/L的过程中,两膜对氨氮的去除率均呈增长趋势,其中原膜由13.23%增至23.68%,改性膜由17.57%增至39.42%,继而增大PAC的加入量,去除效果无明显变化。PAC的加入量在10~30 mg/L时,原膜的极限超滤时间维持在70 min以上,改性膜的极限超滤时间维持在150 min以上。综合考虑出水水质和经济成本的影响,采用组合工艺处理赣江微污染水源水时PAC的加入量宜在30~40 mg/L范围内。
The modified PSF ultrafiltration membrane was prepared and the effect of treating the micro-polluted source water in Ganjiang River by the combination of original membrane and modified membrane respectively with coagulation process was studied. The results show that the combined treatment of turbidity, the two membrane treatment effect is more obvious, the PAC added less affected. The UV - (254), ammonia nitrogen treatment, the modified membrane treatment effect than the original film. When 40 mg / L PAC was added, the removal rate of UV_ (254) reached the maximum, which was 39.52% for original membrane and 58.73% for modified membrane. In the process of increasing the input of PAC from 10 mg / L to 30 mg / L, the removal rates of ammonia nitrogen in both membranes showed an increasing trend, of which the original membrane increased from 13.23% to 23.68%, the modified membrane increased from 17.57% To 39.42%, and then increase the amount of PAC added to remove the effect no significant change. When PAC is added in the range of 10-30 mg / L, the ultimate ultrafiltration time of the original membrane is maintained above 70 min, and the ultimate ultrafiltration time of the modified membrane is maintained above 150 min. Considering the influence of effluent quality and economic cost, PAC should be added in the range of 30-40 mg / L when the combined process is used to treat the micro-polluted source water in Ganjiang River.