Pretreatment of wastewater containing hydrocarbon emulsion and heavy metals


  • Prefiltration and decantation of water to be treated
  • Elimination of suspended solids (SS) by in-line or filler (polishing ceramics, trovalising, etc.) coagulation/flocculation
  • Neutralisation of the pH (acid/base)
  • Separation and conditioning of sludge by lamellar settling, filter press, or filter bags.


  • Competences: Canplast provides services for the manufacture of all structures making up the pre-treatment chain: decanter with filtration, separator, storage tank, pre-treatment unit (in-line or filler)
  • Guarantee : Canplast guarantees a water discharge in compliance with the standards and directives in force.
  • Quality of material: All components of the chain are made of plastic (PP, PE or PVC) which guarantees total reliability and resistance to gases, acids and corrosion.
  • Comprehensive support: Canplast, in collaboration with a chemistry company, takes care of the whole project, i.e. the study of the chemical process, the manufacture and installation on site, the sanitary and electrical connections, as well as testing and commissioning of the installation.



Examples of applications

Pre-filtration before treatment

In-line treatment

(Coagulation / pH neutralisation / Flocculation)

Lamellar settling before filter press

Before treatment

After treatment

Lamellar settling before filter press

List of references

Companies Place  Country
 Morel-Cottet SA  F-39400 Morbier  France
 Préci Jura SA  F-39250 Mignovillard  France
 Sapem-Schneider SA  F-73230 Saint Alban Leysse  France
 Best in Class SA  CH-1272 Genolier / Vaud Switzerland
 Joray Wyss SA  CH-2800 Delémont / Jura Switzerland
 HSM SA  CH-2114 Fleurier / Neuchâtel Switzerland
 Ruetschi Technology SA  CH-1400 Yverdon-les-Bains / Vaud Switzerland
 Decayeux STI (France)  RO-325700 Otelu Rosu  Roumania
 Mimotec SA  CH-1950 Sion / Valais Switzerland
 Omega SA  CH-2502 Bienne / Berne Switzerland
 Comadur SA  CH-2400 Le Locle / Neuchâtel Switzerland
 Materlignes - Schneider SA  F-41800 Montoire sur le Loir  France
 BTG Eclépens SA  CH-1312 Eclépens / Vaud Switzerland
 Intercosmetica SA  CH-2000 Neuchâtel / Neuchâtel Switzerland
 Grossoptic D.O.O.  SRB-11000 Beograg Serbia