Aerobic biological treatment

For removal of dissloved organic substances

Aerobic biological wastewater treatment processes use bacteria and oxygen (from injected air) to remove dissolved organic load (COD/BOD) from your wastewater. The process is controlled by oxygen sensors in the activated sludge (aeration tank) and residual bacteria (waste activated sludge) can be separated various ways.

Processes offered by SYMBIONA cover the entire range of aerobic biological wastewater treatment systems. We use different separators – from membranes, through EFFISEP™ MBBR separators to flotation units and circular clarifiers. Our advantage consists in our own knowledge that allows us to program the supervision system (PLC) to minimize the power consumption required for aeration and optimize the process.

Our scope of supply covers the following:

Membrane Bioreactors, type AeroMem™-SUB

In this system, clean water is separated from waste sludge by membranes (on a cellular level). We use high quality submerged modules (AeroMem™-SUB, which can be installed either in the aeration tank or in a separate membrane tank, with MLSS up to 16g/l) or external membrane systems for very high MLSS concentrations (AeroMem™-X, up to 25g/l).

Moving Bed Bioreactors and IFAS systems, type FloBed™

The use of high surface carriers (>650m2/m3) floating in the biological reactor results in controlled growth of biofilm bacteria in the aerobic reactor. The system can be used for biological filtration (MBBR, MBBR-BNR) or coupled with activated sludge (IFAS), where additional denitrification is required. These systems offer high stability for toxic compounds and changing flows, with a very small surface required to remove high COD loads. In case of high effluent discharge limit, a membrane system can be included to remove the solids in a hybrid MBBR-AeroMem™ system.

Continuous flow activated sludge reactors with clarifiers or flotation biological reactors

Wastewater flows through biological reactor in continuous plug-flow system ended with a clarifier for waste biological sludge and effluent separation. In case of our flotation biological reactors (FloFBR™) traditional clarifier is replaced by sludge flotation as activated sludge clarifier. It makes the system more compact, due to a higher concentration of MLSS in the aeration tank.

Sequence Batch Reactors (SBR)

Well known process operating in a single tank or in multiple tanks. All the processes required to clean wastewater are used in one tank or a series of tanks with nitrification and nitrogen removal. The process can be simplified or in full automation.

AeroDuct™ aerators

For old type oxidation ditches we supply our own aerating brush rotors. They are usually coupled with automated weirs and oxygen control to provide cost-effective organic load removal.