01 – Reactor chamber
02 - Compressor with control unit
A - Primary acquiring chamber
B - Biological Association
C - Chamber for sedimentation
D - The pool of surplus sludge

Purification process
Unit is designed for treatment of active mud in order to eliminate carbon compounds and simultaneous stabilization of sludge. Alternatively, product could be extended with device with capacities of SBR technology, or the de-nitrification. Device can be added at the request with the unit for tertiary treatment and chemical removal of phosphorus.

Mechanism of Treatment
Chamber A is designed for acceptance of solid material and to be cleaned as necessary.
Chamber B is a biological chamber in which the aeration is done with the aim of the oxidation of carbon compounds and stabilization of mud. At the same time in the chamber B, to a certain extent, takes place the process of nitrification and de-nitrification. Water overflows from chamber B to chamber C where the deposition takes place of active sludge. Sludge is recalculated by vacuum pump in biological chamber B, the excess sludge is by another vacuum pump occasionally evacuate to the chamber for excess sludge.
The efficiency of the process depends on the proper definition of the cycle aeration, circulation and evacuation of excess sludge. All three processes can take place simultaneously, ordinal, or mixed. The duration of aeration should be defined so as to maintain the pool in the biological concentration of dissolved oxygen from 1.5 to 2.5 mg / liter. Installing a meter dissolved oxygen in the biological chamber and its coupled blower work with this important element of the process is always under control. Due to the high cost of the meter dissolved oxygen it is often not built; the cycle defines the experience during probation period.
When the concentration of active sludge in the biological chamber reaches a value greater than allowed, the evacuation is done by vacuum pump to the chamber D which is used as a chamber for excess sludge.

Materials for manufacturing
Reactor chambers are made of polyethylene, ordinary anti-corrosion-protected steel or stainless steel. Chamber D performed in the concrete variant, or polyethylene (buried). Compressor and control cabinet are placed in basement or other suitable premises. If there is no such space equipment require additional premise to build.

Unit sizes

Feature Measure Size
Capacity ES 10 25 50 75 100
Flow m3/dan 2 5 10 15 20
Reactor volume m3 3 7 12 18 24


Effluent parameters Average (mg/lit) Maximum (mg/lit)
BPK5 15 25
Suspended solids 20 30


Water after mechanical and biological treatment occurs in the gravitational reservoir, where the pump throws to the sand filter under pressure. Filtered water leaves the reservoir of clean water and overflow to the recipient. Washing of filters is done with clean water under pressure and as needed additional air, already available. Water drains from the washing of filters at the beginning of the process.
Filtration process bringing following effects:

  • BPK5 reduction of up to 60%
  • Reduction of suspended matter up to 65%

Chemical treatment can be added after filtration, but only in case required by recipient.

Often, in order to protect the environment, it is important to make disinfection.
It is common disinfection by sodium hypochlorite, chlorine or by UV disinfection. Method of disinfection shall be elected on the basis of the size of the device, requirement of a recipient and it is an influential factor in pricing of disinfection.

Scope of delivery

  • Two submersible pumps for admission chamber
  • Reactor chambers
  • Compressor with command unit
  • Aerators
  • Pipelines for water and air with the necessary fittings
  • Vacuum pump for sludge recirculation
  • Vacuum or submersible pumps for surplus sludge

Delivery on request

  • Compressor
  • Flow meter
  • Dissolved oxygen meter
  • Unit for tertiary treatment
  • Equipment for disinfection
  • Chamber for surplus sludge