超滤陶瓷膜深度处理造纸废水的实验研究

Experimental Study of Ultrafiltration Ceramic Membrane for Advanced Treatment ofPapermaking Wastewater

关键词:  超滤陶瓷膜  造纸废水  错流过滤  反清洗

Key Words:ultrafiltration ceramic membrane  papermaking wastewater  cross-flow filtration  backwash

摘要:针对当前造纸废水水质特点及深度处理工艺，提出采用超滤陶瓷膜绿色节能工艺对造纸废水开展深度处理实验研究。结果表明，陶瓷膜的最佳工作条件为：跨膜压差0.2 MPa、进膜流量1000 L/h，在该条件下造纸废水的固体悬浮物（SS）去除率大于94.5%，化学需氧量（COD_Cr）去除率大于76.2%，色度去除率高于72.3%，水质达到了《制浆造纸工业水污染物排放标准》（GB 3544—2008）要求；膜清洗再生实验结果表明经过反循环化学清洗后超滤陶瓷膜通量可以恢复至90%以上。

Abstract:Aiming at the current water quality characteristics and advanced treatment technology of papermaking wastewater, this paper proposed to carry out advanced research on papermaking wastewater treatment by using ultrafiltration ceramic membrane green energy-saving technology. The test results showed that the optimal working condition of ceramic membrane as followed: transmembrane pressure difference 0.2 MPa, film flow rate 1000 L / h. Under these conditions, the solid suspended matter (SS) removal rate of papermaking wastewater was greater than 94.5%, the removal rate of chemical oxygen demand (COD_Cr) was greater than 76.2%, and the removal rate of chroma was higher than 72.3%. The water quality met the requirements of "Water Pollutant Discharge Standard for Pulp and Paper Industry"(GB 3544—2008). The results of membrane cleaning and regeneration experiments showed that the ultrafiltration ceramic membrane flux could be restored higher than 90% after reverse cycle chemical cleaning.