Processes I.W.W.

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Water treatment Engineering and Technologies

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INDUSTRIAL WASTE WATER (I.W.W.)

A specific apparatus is associated to each treatment.

Secondary biological treatments – Anaerobic processes

When preliminary treatments have as objective the removal of coarse substances and a part of the solids in suspension, secondary treatments have as objective to eliminate the rest of the suspended solids and also a maximum of the dissolved salts. When a biological process is used, the removal of organic material (or carbon-load) is the principal objective. Simultaneous removal of a small part of the nitrogen and phosphorus-loads occur.
When a higher level of C, N et P-removal must been obtained, a tertiary treatment must complete the scheme.

  • Free floating biomass reactor (complete mixed)

    ANAFREE

    • one or two steps
    • with or without sludge bed

  • Fixed biomass reactors

    ANAFIX

    • one or two steps
    • on support in movement
    • on support without movement

  • Secondary settler for water clarification and sludge extraction :

    • with sludge recirculation (internal or external)

      Solid – liquid separation is improved by sludge recirculation to the inlet of the unit

      HYDROGYR type I

      HYDROGYR type E

    • with plates (with or without sludge recirculation)

      Solid – liquid separation is improved by forcing the flow between plates mounted at an angle in the clarification zone

      HYDROPAC

      HYDROPAC - R

    • with or without sludge blanket

      Solid – liquid separation is improved by forcing the flow through a permanent liquid sludge layer

      HYDROZONE

    • with or without pulsation of the sludge blanket

      Method of controlling the height of the sludge bed

      HYDROPULS

    • specific clarifier with or without bottom sludge scraper

    • specific clarifier with or without scum scraper

  • Sludge recirculation :
    • with or without intermediate thickening
    • by centrifugal, volumetric or Archimedes pumps

 

For some examples, click here.