电极超滤膜生物反应器处理阴离子表面活性剂废水

化妆品生产过程中产生大量的阴离子表面活性剂废水，具有有机物浓度高和易产生泡沫的特点，影响普通超滤膜生物反应器（UMBR）的处理效果和稳定运行。采用自制的电极超滤膜生物反应器（EMBR）处理阴离子表面活性剂废水，考察电流强度对EMBR污染物处理效果和活性污泥性质的影响，探索膜污染的机理。结果表明：与UMBR相比，在电场能的作用下，EMBR滤饼层的有机物含量较低，跨膜压差（TMP）降低50%左右，膜污染较轻。当电流强度为10 mA时，COD去除率和微生物活性最高，分别为97.92%和41.6 mg/（g TSS·h）；滤饼层有机物含量最低，PN、PS和HA的浓度分别为5.6、8.02、0.85 mg/L。较低的电流强度即可促进微生物活性和污染物去除率的提高，有效控制膜污染。

The treatment of anionic surfactant wastewater using electrode ultrafiltration membrane bioreactor

A large amount of anionic surfactant wastewater is produced in the process of cosmetics production. It has the characteristics of high organic concentration and easy to produce foam, which influence the treatment efficiency and stable operation of ordinary ultrafiltration membrane bioreactor (UMBR). In this study, a self-made electrode ultrafiltration membrane bioreactor (EMBR) was used to treat anionic surfactant wastewater. The effects of current intensity on the treatment efficiency of the pollutants and activated sludge properties were investigated, and the mechanism of membrane pollution was studied. The results showed that compared with the UMBR, under the action of electric field energy, the organic matter content in the filter cake layer of EMBR is lower, the transmembrane pressure difference (TMP) is reduced by about 50%, and the membrane fouling is less. When the current intensity was 10 mA, the removal rate of chemical oxygen demand (COD) and microbial activity were the highest, and were 97.92% and 41.6 mg/(g TSS·h), respectively. The organic content in the cake layer was the lowest and protein (PN), polysaccharide (PS) and humic acids (HA) were 5.6 mg/L, 8.02 mg/L and 0.85 mg/L, respectively. A relative low current intensity can promote the improvement of microbial activity and pollutant removal rate, and effectively control membrane pollution.