Wastewater Purification

The treatment that enables the purification of water used in the production process and makes it suitable for environmental parameters.

Wastewater, exiting from industrial plants and processing, is laden with chemicals and micropollutants that are toxic to health and the environment.

To dispose of them, treatments are required to make them free of excess components, achieving the degree of purity required by the regulations (Legislative Decree 152/06).

Coind Wastewater Plant

Wastewater purification occurs through chemical or physical reactions, which include separation from:

  1. Bacterial load
  2. Organic or inorganic molecules
  3. Dissolved salts
  4. Nitrogen, nitrate and phosphorus
  5. Chlorides, sulfates
  6. Chrome plated
  7. Colloids
  8. Mud
  9. Oils and minerals
  10. Heavy metals

Plants of
Wastewater Purification

Bilge waters

Coind has designed a chemical-physical system capable of purifying ship bilge water producing a discharge compatible with current regulations for discharge at sea. Bilge water consists of a mixture of hydrocarbons with brackish water in various proportions, the quantity and quality of which can vary from a minimum of 10% up to 50% of the liquids taken. Treatment of the effluent consists of separating the oil from the water directly inside the storage tanks. In this way, the oil can be transferred to an equipped center that will transform it into a recovery fuel, and the water can be purified in the chemical-physical plant built by Coind.

Activated Carbon Adsorption

Removal of organic molecules by passing water or air over a bed of granular activated carbon. The operation can be manual or automated with pneumatic valves.

Water Clarification

Separation of suspended substances or colloidal systems from water flows, upstream or downstream of a production process.


Dosage of oxidants for water sterilization.

Water Decanter

Separation of coarse molecules that allow for the reduction of machinery space and exponentially increase water quality.


Removal of iron molecules present in the water stream. It is done by oxidative systems or with specific ion-exchange resins.

Active Sludge Purifier  

Water Disinfection

Reducing the bacterial load of liquid in transit. From chemical oxidant dosing to new UV/Ozone technologies.

Electrocomposting Animal Droppings

Treatment of animal manure by electrolysis and electrocoagulation to obtain soil suitable for the parameters required for use in agriculture.

Water Filtration

Separation of materials of different sizes present in the water flow. Filters work by gravity, as in the case of channel grates or the auger filter.

Combined chemical-physical-biological plants

Industrial Reverse Osmosis

Production of demineralized water through semipermeable membranes on pressurization systems. When installed downstream of purification systems, it allows wastewater recovery, with the possibility of using the flow again in productions.

Polishing on Activated Charcoal

Water Cooling

Temperature regulation of water flows. It is applied with heat exchangers or specific unit heaters.

Recovery in Water Production

Use of specific facilities to recover water flows directly into productions.

Electrochemical Reduction of Chromates

Sludge treatment

Separation of sludge by settling systems and subsequent thickening before dewatering through a filter press in a sludge warehouse.

Ultrafiltration Water

High-level filtration by displacement of fluid over membranes. It is used for primary water purification or to separate molecules.