采用納濾、反滲透深度處理綜合性制藥廢水,研究單級與循環處理模式下的膜通量變化和清洗效果,測定了膜清洗適宜時間、膜通量和出水率。結果表明實驗條件下,納濾膜日常清洗物理清洗時間7 min,強化清洗酸洗—堿洗時間各90 min,平均膜通量單級16.1 L/(m2 h)、循環7.7 L/(m2 h),出水率73 %。反滲透膜日常清洗物理清洗時間12 min,強化清洗酸洗—堿洗時間各90 min,平均膜通量單級12.8 L/(m2 h)、循環7.2 L/(m2 h),出水率74 %。根據膜通量變化,確定了適合膜分離工業化應用的處理和清洗方案。
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