生物铁法-SMBR性能的研究

为提高膜生物反应器的处理效果和减轻膜污染,将生物铁法与一体式膜生物反应器相结合,提出了生物铁法-SMBR.利用生物铁法-SMBR处理模拟印染废水并与普通SMBR进行平行对比试验.结果表明,生物铁法-SMBR在提高处理效果、减轻膜污染、改善污泥性能方面具有明显优势.在容积负荷比普通SMBR平均高25%的情况下,生物铁法-SMBR对COD、染料和NH₃-N的去除效率分别高1.0%、9.5%和5.2%.在膜通量均值比普通SMBR提高25%的情况下,压差只有后者的36%.在不排泥的条件下,生物铁法-SMBR稳定运行天数是后者的2.5倍.生物铁法-SMBR污泥絮体疏松多孔、呈团粒状、颗粒大,平均粒径是后者的3.10倍,系统中存在大量原、后生动物,污泥比耗氧速率SOUR是后者的1.23倍.

Studies on the Performance of Bioferric-SMBR

To enhance removal efficiency and to mitigate membrane fouling,submerged membrane bioreactor and Bioferric process are combined to Bioferric-SMBR.Parallel compared experiment of Bioferric-SMBR and common SMBR dealing with dyeing wastewater was carried out.Bioferric-SMBR show great superiority and can enhance removal efficiency,reduce membrane fouling and improve sludge characteristic.When volume load rate is 25% higher than that of common SMBR,the removal efficiency of Bioferric-SMBR on COD,chroma and NH₃-N is 1.0%,9.5% and 5.2% higher than that of the latter respectively.The trans-membrane pressure of Bioferric-SMBR is just only 36% of that in common SMBR while it's membrane flux is 25% higher than that of common SMBR.(It's) stably running day is 2.5 folds of which in common SMBR when there is no surplus sludge discharged.The MLSS concentration of Bioferric-SMBR is higher than that of the latter with more different kinds microorganism such as protozoan,metazoan,etc.It's mean particle diameter value and sludge oxygen use rate(SOUR) of the former are 3.10,1.23 times of the latter respectively.