Keywords: ABR, anaerobic baffled reactors, beet sugar wastewater, pilot plant, organic loading rate, wastewater treatment, hydraulic retention time
The effects of organic loading rate on the performance of an Anaerobic Baffled Reactor (ABR) treating beet sugar wastewater: pilot experiments
A pilot-scale Anaerobic Baffled Reactor (ABR) effective volume 1.2 m³ and four compartments was used for the treatment of a beet sugar wastewater. The effect of organic loading rates on the operational performance was investigated. The experimental results showed that when influent COD concentration varied from 2000 mg/L to 9000 mg/L, the reactor was rapidly started-up with a Hydraulic Retention Time (HRT) of 60 h at ambient temperature. Since then the HRT was steadily reduced to 48 h, 36 h and 24 h eventually, the COD removal efficiency was more than 70% at all HRTs tested. The system was effective for the treatment of high-strength wastewater with the potential of rapid start-up, run smoothly, high removal efficiency both at low and high organic loading rate.