[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.