He Yiliang, Xu Pei, Li Chunjie, Zhang Bo
School of Environmental Science & Engineering, Shanghai Jiaotong University, Shanghai 200030, China.
Water Res. 2005 Oct;39(17):4110-8. doi: 10.1016/j.watres.2005.07.030. Epub 2005 Sep 2.
The viability of treating high-concentration food wastewater by an anaerobic membrane bioreactor (AMBR) was studied using polyethersulfone (PES) ultrafiltration membranes PES200, PES300, PES500 and PES700 with norminal molecular weight cutoff (MWCO) ranging from 20,000 to 70,000 Da. Hydraulic and solid retention time significantly affected the treatment performance of the AMBR kept at 60 h and 50 days in the study. The four membranes exhibited a similar efficiency in removal of suspended solids, color, chemical oxygen demand (COD) and bacteria. When the volumetric loading rate was below 4.5 kg/m3d, COD removal rate was in the range of 81-94% and the gas yield stabilized at 0.136 m3/kg COD. The effect of membrane properties including MWCO, hydrophobicity and surface morphology on membrane fouling and cleaning was evaluated. The PES200 membranes with the smallest MWCO and smoothest surface exhibited a serious initial flux decline, whereas the PES700 membranes with the largest MWCO and roughest surface were observed related to the highest flux decline and the lowest recoverable flux rate during long-term operation. Membrane autopsy revealed that the significant flux decline was caused by the formation of a thick biofouling layer onto the membrane surfaces.
采用标称截留分子量（MWCO）为20,000至70,000 Da的聚醚砜（PES）超滤膜PES200、PES300、PES500和PES700，研究了厌氧膜生物反应器（AMBR）处理高浓度食品废水的可行性。在本研究中，水力停留时间和固体停留时间显著影响了保持在60小时和50天的AMBR的处理性能。这四种膜在去除悬浮固体、颜色、化学需氧量（COD）和细菌方面表现出相似的效率。当体积负荷率低于4.5 kg/m³·d时，COD去除率在81 - 94%范围内，气体产率稳定在0.136 m³/kg COD。评估了包括MWCO、疏水性和表面形态在内的膜性能对膜污染和清洗的影响。MWCO最小且表面最光滑的PES200膜在初始通量下降严重，而MWCO最大且表面最粗糙的PES700膜在长期运行期间通量下降最高且可恢复通量率最低。膜剖析表明，通量显著下降是由于膜表面形成了厚厚的生物污染层。
