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Industrial WWTP - GAH CompReactor

Proper treatment and disposal of used water from an activity (especially from some specific industries) is essential to prevent adverse environmental impact and to ensure compliance with specified emission limit values.
Wastewater treatment processes can be relatively simple or can sometimes be quite expensive and complicated, including such treatment technologies as:

  • screening (coarse or fine)
  • grit removal
  • de-toxification
  • metal precipitation
  • material recovery
  • air flotation (dissolved or dispersed)
  • balancing (hydraulic or organic)
  • pH control
  • activated sludge (plug flow, complete mix or SBR)
  • nitrification and de-nitrification
  • biological filtration
  • bio-filtration and activated sludge
  • anaerobic processes
  • clarification
  • phosphorous precipitation
  • sand filtration
  • chemical precipitation
  • managed wetlands
  • grass plot irrigation
  • sludge stabilisation
  • sludge de-watering
  • reverse osmosis
  • membrane filtration
  • carbon filtration

View the Waste Water Treatment Presentation in Greek and English.

Discharges from individual sites may be required to meet very onerous emission limit values for Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), ammonia, nitrate, phosphorous, suspended solids, fats/oil/greases metals, etc. The design and operation of the wastewater treatment plant is therefore critical on most sites where high levels of efficiency in terms of carbonaceous BOD removal, nitrification, de-nitrification, phosphorous removal, etc, are required.
Our expertise and experience in terms of the design and operation of wastewater treatment systems is well recognized.
We pride ourselves in being able to assess existing systems, optimise their performance, and develop cost effective plans for upgrading or extending existing plants where necessary.
We do not confine ourselves to consideration of end-of-pipe technology. We have the capacity and capability to assess process areas and to develop waste reduction programmes, which in many cases can overcome the need for extending a wastewater treatment plant.



The activated sludge biological treatment plant process involves the biological oxidation of the waste water with air and sludge recycle. The effluent is oxidized by means of an extended air injection in order to obtain the total oxidation of the biological components. The sedimentation chamber separates the sludge from the clarified water, which is collected to a chlorination chamber.

This activated sludge biological treatment plant represents the best solution for single users or small communities. The compact construction permits the installation in parallel of two or more units, allowing to treat a huge volume of raw water.
The tank is completely made painted carbon steel. The submerged type aeration system guarantees a long plant lifetime.