摘要
为了研究PVC中空纤维超滤膜直接处理高浓度污水的能力以及膜污染的控制方法,实验将PVC超滤膜采用错流过滤直接处理某污水处理厂生活污水,并采用脉冲进料控制膜污染.结果表明,生活污水经三级过滤后,相关指标达到一级A排放标准:污水浊度降到0.1NTU以下:CODCr由120.97mg/L降到47.34mg/L,去除率为60.9%;DOC由8.95mg/L降到4.08mg/L,去除率为54.4%;细菌截留率为99.6%.实验研究表明,采用低频脉冲进料可以有效提高膜表面的剪切力,缓解超滤膜的污染,与连续运行方式相,低频脉冲进料能提高膜的平衡通量近2倍.
In order to investigate the ability of PVC hollow fiber membrane for sewage treatment and control of membrane fouling, PVC membrane was directly applied to treat municipal sewage with cross-flow filtration. And, pulse feeding was used to reduce membrane fouling. Results showed that when municipal sewage was treated three times by PVC membrane, related indexes were up to the national standard of A for Class One, the turbidity is below 0.1NTU, CODcr decreases from 120.97mg/L to 47.34mg/L, the removal efficiencies is 60.9%, DOC changes from 8.95mg/L to 4.08mg/L, the removal efficiencies is 54.4%. And, rejection rate of bacteria is 99.6%. Experimental results also indicated that the stable membrane flux can be increased almost 200% by low frequency pulse feeding. So, it is confirmed that membrane fouling can be relieved effectively by using pulse feeding to enhance shear force on membrane surface.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2015年第2期75-81,共7页
Membrane Science and Technology
基金
海南省科技兴海专项项目(XH201421)
关键词
PVC超滤膜
生活污水
脉冲进料
膜污染
PVC ultrafiltration membrane
municipal sewage
pulse feeding
membrane fouling
作者简介
第一作者简介：彭婷（1990-），女，湖南省衡阳市人，硕士生，研究方向为膜法处理污水以及膜污染控制研究，E-mail：18389946479@163．com
