采用纳滤、反渗透深度处理综合性制药废水,研究单级与循环处理模式下的膜通量变化和清洗效果,测定了膜清洗适宜时间、膜通量和出水率。结果表明实验条件下,纳滤膜日常清洗物理清洗时间7 min,强化清洗酸洗—碱洗时间各90 min,平均膜通量单级16.1 L/(m2 h)、循环7.7 L/(m2 h),出水率73 %。反渗透膜日常清洗物理清洗时间12 min,强化清洗酸洗—碱洗时间各90 min,平均膜通量单级12.8 L/(m2 h)、循环7.2 L/(m2 h),出水率74 %。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。
Comprehensive pharmaceutical wastewater was treated with advanced nanofiltration and reverse osmosis. The membrane flux change and cleaning effect were studied in single-stage and cyclic modes as the appropriate cleaning time, flux and water yield rate were measured. The results show that the daily physical wash time was 7 minutes to nanofiltration, the intensive acid and alkali wash time was 90 minutes respectively, the average flux was 16.1 L/(m2 h) in single-stage and 7.7 L/(m2 h) in circulation, the water yield rate was 73 %. The daily physical wash time was 12 minutes to reverse osmosis, the intensive acid and alkali wash time was 90 minutes respectively, the average flux were 12.8 L/(m2 h) in single-stage and 7.2 L/(m2 h) in circulation, the water yield rate was 74 %. The suiTab.treatment and wash schemes were suggested for industrial application of membrane separation to pharmaceutical wastewater according to the flux change.
TQ460.9; X787; TQ09