生物铁膜生物反应器（SMBR）处理生活污水的试验研究

试验研究了在SMBR中投加不同量氢氧化铁对出水水质以及膜污染的影响。结果表明，生物铁SMBR中随氢氧化铁投加量的增加，CODrr，NH3-N去除率略有提高；当氢氧化铁投加量为混合液中污泥浓度的0～5％时，TP去除率逐渐提高，在7％时急剧下降。试验条件下氢氧化铁最佳投加量为混合液污泥浓度的5％．此时半透膜压增长最慢，膜污染程度最轻。在3％～5％的投加量下生物铁具有良好的絮状结构，有效地降低了膜表面滤饼层阻力,并且缓解了膜孔堵塞的影响,然而当投加量增大到7％时，生物铁结构变得密实，削弱了生物铁对溶解性有机物和磷的吸附，加剧了膜污染．

Test Study on Municipal Sewage Treatment by Bioferric-SMBR

The experiment explores the effect of different dose of Fe（OH）3 to the effluent quality and membrane fouling in the treatment of simulated municipal sewage by bioferrie-SMBR. The research indicates that the removal efficiency of CODcr and ammonia nitrogen has a little improvement with increasing Fe（OH）3 dose from 0 to 7% of mix liquid sludge concentration in SMBR; the removal of total phosphorus increases gradually when adding Fe（OH）3 is from 0 to 5%, but decreases rapidly at 7%, At the same time, on the condition of 5% Fe（OH）3 dose, the trans-membrane pressure rises most slowly in comparison with the others. Therefore, the optimal dose of Fe（OH）3 is 5% of sludge concentration in bioferrie-SMBR process. Bioferrie sludge has better floceulent structure at the lower Fe（OH）3 dose which could adsorb the dissolved organic matter in SMBR effectively and decrease the cake layer resistance on the membrane surface and alleviate the membrane pore blocking, However, the structure of bioferrie sludge becomes compact at the higher Fe（OH）3 dose of 7% which declines the sweep of total phosphorus and dissolved organics matter and deteriorates the membrane fouling.