Bio-Batch - Sequencing Batch Reactors (SBR)

Enhanced Treatment Performance

• Superior sludge settling performance due to bio-selector and aerobic/anoxic/anaerobic cyclic sequences
• Suppress filamentous bacteria thus lower potential for sludge bulking
• Enhanced nutrient removal (Denitrification and Bio-P) without chemicals or separate tanks
• Built-in equalization capacity preventing performance deterioration during surge conditions

Smaller Footprint and Lower Construction Cost

• Equalization, biological treatment, and clarification achieved in one tank
• No external return sludge pumping system
• Rectangular tanks with common-wall design
• Simple Process, fast construction and installation

Flexibility

• Duration of cycle or sequences can be adjusted to accommodate variation in hydraulic flow or biological loading, e.g. shorter cycle for peak flow conditions or shorter aeration time for lower loading
• Easy expansion with single rectangular tank design
• Automatic control system provides easy and flexible adjustment to operational parameters

Low Operation and Maintenance Cost

• Better aeration control, denitrification, lower power consumption
• Less and simpler equipment thus reduced maintenance
• Automatic control adapting to changing conditions with less operator attention
• Biological N and P removal without need for chemicals

React

Raw wastewater is introduced into reactor and mixed with biomass for bio-reaction.
AIR-ON: Oxygen is introduced by aeration to satisfy oxygen demand for BOD removal and nitrification.
AIR-OFF: Aeration stops and mixers are turned on to provide anoxic conditions for denitrification.

Settle

Aeration system and Mixers are shut off while influent continues entering the reactor. A tranquil condition is created in the main aeration zone for efficient sludge settling.

Decant

The clear, treated water is decanted as final effluent. A swing or telescopic type decanter is used to remove the clarified supernatant from the tank.