Enhanced Biodegradation of Formaldehyde Using Aerobic Sequencing Batch Rotating Bed Bioreactor With and Without Stimulation by Hydrogen Peroxide

The removal of formaldehyde as a toxic substance from aqueous solutions is particular importance. In this research, sequencing batch rotating-bed bioreactor (SBRB) was used on laboratory scale for biodegradation synthetic wastewater. reactor made plexiglas with cylindrical shape. Kaldnes media were placed in rotating basket the reactor. effects concentration (500–1500 mg/L), hydraulic retention time (HRT) (8, 15, 24 hours), and injection hydrogen peroxide (0.1-0.5 mM) performance investigated. results showed that SBRB, at an HRT hours inlet 1000 mg/L, efficiencies chemical oxygen demand (COD) 99.2% 92%, respectively, while without bed, efficiency COD found to be 95% 83%, respectively. By adding 0.3 mM operation SBRB 8 improvement (4% 22%, respectively) observed. Accordingly, stimulation could considered high-performance process corresponding short HRT.