Activated sludge

Water treatment with activated sludge takes place through the biological decomposition of organic water pollution. Bacteria in sufficiently high concentrations, adapted to the specific industrial waste water type, break down the waste water. The degradation processes take place in the aeration basin by applying sufficient oxygen via an aeration system. Biological nitrogen and phosphorus can also be removed with an adapted design and adapted processing.

Constant concentration of activated sludge

Following biological treatment, the floc with bacteria is separated from the treated water by sedimentation or filtration. The greater part of the sedimented and filtered activated sludge floc is returned to the aeration basin. The quantity of bacteria is constantly growing. To keep the activated sludge concentration constant in the aeration basin, excess sludge needs to be removed from the system.

Activated sludge system, the applications

We install activated sludge systems in various forms: Conventionally via a separate aeration basin and post-sedimentation tank(also referred to as a 'settler' or 'clarifier').

  • An oxidation ditch, or a specific form of aeration basin with continuous circulation of activated sludge.
  • A Sequence Batching Reactor (SBR), in which aeration and sedimentation take place in the same basin. The processes take place by programming different cycles: the filling phase, mixing phase(s), aeration phase(s), sedimentation phase and finally the decantation phase. A membrane bioreactor, where the activated sludge and treated water are separated, not by settlement, but by membrane separation.

Lab tests by Aquaplus

Have us test your waste water to see to what extent it is biologically treatable. On this basis we will make an appropriate proposal for a new water treatment system or an extension of the existing one. We are also the right address for acute problems in a biological water treatment process.

Our accredited laboratory can carry out a wide range of microscopic analyses to monitor the health of the activated sludge.

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