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采用MBR处理螺旋霉素废水,通过120 d的试验比较了两种平板膜组件的性能。在试验前期(0～80 d)平板膜Ⅱ的通量和膜比通量均高于平板膜Ⅰ;在后期(81～120 d)膜Ⅱ发生了不可逆污染,膜通量和膜比通量均低于膜Ⅰ,且不稳定。平板膜Ⅰ对COD、蛋白质和多糖的平均截留率分别为30.50%、14.03%和39.51%,膜Ⅱ的平均截留率分别为29.81%、11.12%和37.36%,二者对有机物的去除效果无显著差异(p=0.05);并且这两种平板膜出水中的有机物表观分子质量分布及浊度亦无显著区别。对化学清洗后溶液成分的分析结果显示,两种平板膜均以有机污染为主。综合考虑技术和经济因素,平板膜Ⅰ更适合于螺旋霉素废水的处理。
MBR treatment of spiramycin wastewater, through the 120 d test compared the performance of two flat membrane modules. At the early stage of experiment (0 ~ 80 d), the flux and membrane specific flux of plate II were higher than those of plate Ⅰ. Irreversible pollution occurred on membrane Ⅱ at the later stage (81 ~ 120 d). The membrane flux and membrane specific flux Are lower than the membrane Ⅰ, and unstable. The average retention rates of COD, protein and polysaccharides in flat membrane I were 30.50%, 14.03% and 39.51%, respectively. The average retention rates of membrane Ⅱ were 29.81%, 11.12% and 37.36%, respectively. The removal efficiency of organic matter was not significant (P = 0.05). And there was no significant difference in the apparent molecular mass distribution and turbidity of the organic matter in the effluent from the two flat membranes. Analysis of the chemical composition of the solution after cleaning showed that two kinds of flat-panel membrane are mainly organic pollution. Considering technical and economic factors, flat membrane I is more suitable for the treatment of spiramycin wastewater.