制药废水膜法深度处理通量变化研究

为了深度处理制药废水，达到工业用水水质标准，对纳滤、反渗透深度处理综合性制药废水的膜通量变化进行了研究。在连续式与循环式处理模式下，研究了膜操作条件、膜通量和水回收率等因素，根据膜通量变化，确定了适合膜分离工业化应用的处理和清洗方案。结果表明：纳滤膜日常清洗中物理清洗时间为7 min、强化清洗酸洗—碱洗时间各为90 min，平均膜通量连续式为16.1 L/(m²·h)、循环式为7.7 L/(m²·h)，水回收率约为73%；反渗透膜日常清洗中物理清洗时间12 min、强化清洗酸洗—碱洗时间各90 min，平均膜通量连续式为12.8 L/(m²·h)、循环式为7.2 L/(m²·h)，水回收率约为74%。研究制药废水深度处理中膜通量的变化，可对制定适合膜分离工业化应用的废水处理和清洗方案提供借鉴和参考。

Research on flux change in advanced treatment of pharmaceutical wastewater with membrane separation

In order to deeply treat pharmaceutical wastewater to meet the industrial water quality standard, the membrane flux change of the comprehensive pharmaceutical wastewater treated with advanced nanofiltration and reverse osmosis was studied. The operating condition, flux and water yield rate were studied in continuous and cyclic modes. According to the change of membrane flux, the treatment and cleaning scheme suitable for industrial application of membrane separation were determined. The results show that the daily physical wash time of nanofiltration membrane is 7 minutes, the wash time of intensive acid and alkali is 90 minutes respectively, the average flux is 16.1 L/(m2·h) in continuous mode and 7.7 L/(m2·h) in cyclic mode, and the water recovery rate is 73%. The daily physical wash time of reverse osmosis membrane is 12 minutes, the wash time of intensive acid and alkali is 90 minutes respectively, the average flux is 12.8 L/(m2·h) in continuous mode and 7.2 L/(m2·h) in cycle mode, and the water recovery rate is 74%. The research on advanced membrane treatment of pharmaceutical wastewater provides a theoretical basis for the industrial application.