The OMNIFLO® SBR submerged bioreactor is a fill-and-draw, non-steady state activated sludge process in which one or more reactor basins are filled with wastewater during a discrete time period, and then operated in a batch treatment mode.

In a single reactor basin, the OMNIFLO® SBR can acheive equalisation, aeration and clarification in a timed sequence, unlike conventional continuous flow processes that require multiple structures to acheive the smae treatment objectives.

The OMNIFLO® SBR is unique in its ability to handle influent flows and a wide range of organic loads and industrial pollutants. It is ideally suited to applications when nitrification, denitrification and biological phosphorous removal are required.

A single cycle for each reactors consists of five discrete phases:

• The Anoxic Fill phase influent is distributed throughout the settled sludge through the influent distribution/sludge collection manifold (ID/SC) and biodegration is initiated. The reactor is filled with wastewater and fill can then aerated, anoxic or a combination of aerated and anoxic.

• The React phase continues the aeration and mixing in the full reactor until complete biodegration is acheived. Influent flow is terminated for this phase.

• The Settle phase allows the biomass to settle, leaving the supernatant above. Aeration and mixing are terminated for this phase.

• The Decant phase removes the effluent from just below the liquid surface via the floating solids excluding decanter.

• The Idle/Waste Sludge phase draws the sludge through the ID/SC, removing it for the reactor. The reactor then waits to receive flow for the next cycle.