SBR Systems

Influent wastewater generally passes through screens and grit removal prior to the SBR. The wastewater then enters a partially filled reactor, containing biomass, which is acclimated to the wastewater constituents during preceding cycles. Once the reactor is full, it behaves like a conventional activated sludge system, but without a continuous influent or effluent flow.  The aeration and mixing are discontinued after the biological reactions are complete, the biomass settles, and the treated supernatant is removed.  Excess biomass is wasted at any time during the cycle.    After the SBR, the “batch” of wastewater may flow to an equalization basin where the wastewater flowrate to additional unit processed can be is controlled at a determined rate.  In some cases, the wastewater is filtered to remove additional solids and then disinfected.