It is the most efficient and economical solution to treat wastewater containing biodegradable compounds. This plant is based on the use of bacteria and microorganisms, which can destroy organic and polluting matter if they are kept under specific environmental conditions. CO2, water, mineral salts and inorganic compounds are the final products of the metabolism of organic matter that also produces the growth and development of activated biomass.


In addition to a biological plant, they include a series of advanced treatments that permit to remove specific organic or inorganic pollutants, in order to reuse part of the effluent in other industrial processes (the recycling effluent is used as “process water of process”).


They are plants that do not include any liquid discharge, related neither to service water nor to process one. The ZLD is the result of a total recycling of the water discharged from the industrial process, in conjunction with a total reuse of treated water and a partial recycling of some chemical components contained in it. The final residue is composed of the crystals of dissolved salts and a part of the organic and not biodegradable components.


They are plants designed for the primary water treatment. They include simple solutions such as water softening, iron removal, de-chlorination, etc. and more advanced solutions such as demineralization, production of ultra-pure water and water with very low conductivity.


Europrogetti S.r.l. is a company that, for more than 30 years, offers to customers its expertise in the design, installation and management of plants for treatment, purification and reuse of civil and industrial water sewage. We can offer solutions which allow the recycling of more than 90% of treated water and we also guarantee the lowest running costs thanks to the implementation of the most efficient and advanced technologies in the field.

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Phone number: +39 049 6988432
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Fenton” reactor is one of the processes of advanced chemical oxidation, applied to oxidize the organic complex constituents, hardly degradable by biological way, transforming them into final simpler products.
This technology is based on the high reactivity of the hydroxyl radical, which is created from hydrogen peroxide and iron, under controlled conditions of pH and temperature.
In particular, adding hydrogen peroxide (H2O2) at 35% and ferrous sulfate (FeSO4) ) in acid condition (pH 2,5 –3), maintained by the dosing of sulfuric acid, hydroxyl radicals OH° are produced according to the following formula: H2O2 + Fe++ → Fe+++ + OH- + OH°

REATTORE1The radical OH°,reacting in aqueous solution with the major part of aliphatic and aromatic molecules, involvs the rupture of C-C links and then, due to chain mechanisms, the degradation of the contaminants. For this reaction, it is required a retention time of about two hours.
In a second tank, also this provided with slow electro-agitator, hydrated lime or soda are added to neutralize the discharges and to eliminate the excess of H2O2, adjusting the pH through reagents’ dosage and a pH-meter. For this second phase, it is required a retention time of about an hour and a half.
Fenton reactor also needs a third step, the flocculation tank, where, through the dosage of polyelectrolyte, it accelerates the separation of sludge flocks from the treated water. The flocculation tank must ensure a contact time of at least 15 minutes.

AAt the exit of the oxidative FENTON treatment, the water must be sent to a sedimentation tank to separate the clarified water from the settled sludge. In this phase, the sludge reaches a thickening of 1÷2%, so it is necessary also to provide a sludge thickening tank, to reach an higher density of sludges.

REATTORE2The advantages of this technology are:

  • Destruction of organic compounds
  • Reduction of the toxicity
  • Best biodegradability of complex compounds
  • Removing the color and smells

The disadvantages are:

  • An increase in operating costs for the purchase of chimica regents;
  • An increased danger in handling/ storage of reagents;
  • UAn high production of toxic sludge, difficult to dispose;
  • A significant increase of dissolved salts (TDS).


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