Water treatment Engineering and Technologies

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MUNICIPAL WASTE WATER TREATMENT (M.W.W.)

Preliminary Treatments

• Basins and wastewater collecting sewers

• Rain water collecting tanks

  • with bottom sludge scraper

  • without bottom sludge scraper

• Storm water collecting tanks

• Pumping stations

  • centrifugal pumps (immersed or not)

  • Archimedes-screws

  • air-lifts

• Removal of algae and plankton

• Grit removal

• Coarse and fine screening (bar screens or sieves)

  • with manually or mechanically cleaning system

  • with or without comminutor

• Desilting

  • with or without air bubbling

  • combined or not combined with oil and grease removal

  • with or without sand classification (and eventually cleaning)

  • circular or rectangular tank (concrete, steel, synthetic material, …)

• Oil removal

  • with or without air bubbling

  • combined or not combined with grease removal

  • with or without granular bed

  • circular or rectangular tank (concrete, steel, synthetic material, …)

• Grease removal

  • with or without air bubbling

  • combined or not with oil removal

  • circular or rectangular tank (concrete, steel, synthetic material, …)

  • biological or physico-chemical treatment

• Treatment of the products originated by emptying septic tanks and cleaning of sewers.

• Coagulation - destabilisation of colloidal particles

  R.A.P.D. ("Réacteur d'Agrégation de Particules par Destabilisation")

  • combined or not with flocculation

  • with static or motorised mixer

• Flocculation – agglomeration of particles by transport et contact one with the other. Larger particles or "flocs" are the result..

  R.A.P.T. ("Réacteur d'Agrégation de Particules par Transport")

  • combined or not with flocculation

  • with static or motorised mixer

  • with or without stirring

  • with or without post-treatment

• Settling

  • settling tank with sludge scraper

    • peripherally driving device

    • centrally driving device

  • settling tank with sludge suction system