The nitrobenzene wastewater treatment by the photocatalytic oxidation membrane bioreactor

A membrane bioreactors (MBR) was added the photocatalyst TiO₂ which was immobilized on polyurethane foam (PF) cubes to make a photodegradation MBR (pMBR). The performance of the pMBR was studied by evaluating the effects of different factors, such as nitrobenzene, COD and BOD₅ concentration, carrier dosage and its microorganisms. The result showed that the photocatalytic oxidation in MBR was playing a main role in removing the pollutions and the COD, BOD₅ and nitrobenzene removal efficiency was high to 90%, 85% and 95% in pMBR, respectively. The monitoring result indicated that the effluent quality of the pMBR reached the 1^st grade of the GB 8978-1996 standard.