Treatment of the OCC Pulping Wastewater Using SBR Cycle Control

ABSTRACT. SBR (Sequencing Batch Reactor) was investigated for the treatment of OCC pulping wastewater in this paper. This study includes the design of the SBR device and its control system, the test of start-up of the SBR, running of the reactor by treating the wastewater. During the start-up process the activated sludge was cultured and acclimated. After acclimation the removal efficiency of CODcr can reach around 80%. Following investigations were focused on evaluation of the treatment efficiency and the reactive cycle during running the SBR. The experimental results showed that the running parameters of SBR reaction system were Fill 2.0 h, React 12.0 h, Settle 1.0~2.0 h, Drain 0.5h, Idle 4.0h. Under these conditions the removal rate of COD can reach 94%. So the performance of SBR for the wastewater was satisfactory as the wastewater had 1500~2500mg/l of COD. The cyclic operation of SBR used in this study proved more effective in treating the wastewater.