Zech Umwelt GmbH

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Industrial Wastewater Treatment

As far as industrial wastewater treatment is concerned, no patent solution can be offered since each type of wastewater presents different characteristics and since each site has different treatment requirements (e.g. the re-use as process water, the direct discharge into the receiving bodies or the indirect discharge into the urban sewer system).

The use of high-quality membrane processes improves the possibilities of the water re-use as process or industrial water. Refraining from direct or indirect discharge and/or the reduction of quantities additionally offers saving potentials in terms of effluent charges.

Depending on initial requirements and raw water quality, Zech Water Technology will assemble specific plants, which will obtain the best possible result for the assigned task. To do so, individual technologies will be combined, if required, in order to reduce individual substances. The following processes may be applied:

  • Ultrafiltration: in order to remove solid- and suspended substances, bacteria and viruses.
  • Nanofiltration: in order to reduce solved substances, such as hardening components (Ca2+/Mg2+) and larger organic trace elements.
  • Reverse osmosis: in order to reduce all solved substances including monovalent ions (Na+, Cl-, etc.).
  • Membrane bioreactor: : in order to reduce biologically degradable organic compounds and inorganic nitro compounds (Denitrification/nitrification)
  • Conventional processes: in order to remove additional substances, to adjust water-chemical parameter or to be used as preliminary or secondary treatment stage for one of the above-mentioned processes.

Rather typical application possibilities can be found in almost all industrial domains where wastewater is being generated. Just to mention some few examples:

  • Food industry (e.g. wastewater treatment including reintroduction into the industrial process)
  • Breweries (e.g. washing liquor treatment)
  • Chemical industry (e.g. valuable substance recovery)
  • Sanitary landfill leachate treatment