Wastewater treatment

Costacurta is specialised in the design and manufacture of vico-screen wedge wire screens for rotating drum screens and rotosieves used in the treatment of waste water.

Waste water treatment involves the removal of contaminants from water. The water purification process is carried out in several phases that can be physical, biological or chemical. Upstream of the waste water treatment process, solids are removed from the water in order to avoid damage to downstream machinery, which would impair the quality of the purification process.

These solids are removed through mechanical pre-treatment. The first phase is screening, a mechanical filtering procedure that separates solids from liquids. This first purification phase can involve coarse screening followed by other finer screening procedures.

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Wedge wire screens for rotating drum screens and rotosieves

The most commonly used screening machines are the rotating drum screen (commonly known as a rotosieve) and the static screen. Inside both machines there is a screen cleaner filter. This filter is the core of the machine and is fundamental in guaranteeing the success of the subsequent purification phases, and therefore in improving the overall efficiency of the process.

The VICO-Screen® screen cleaner filter is a high-quality wedge wire screen filter. Costacurta can supply it as a flat panel, a section of a cylinder or as a finished cylinder manufactured according to the clients’ specifications. These screens are used in wastewater treatment plants; the main ones are domestic sewage plants, food farming industries, paper mills, sugar factories and chemical plants.

These filters are self-supporting and therefore do not require any special frame or structure.

Distinctive characteristics of the wedge wire screens for rotating drum screen (rotosieve):

  • High precision continuous openings with which a larger open area can be obtained
  • Limited risk of clogging, thanks to the special geometry of the holes
  • Long-life, thanks to the material used, generally stainless steel, and the high mechanical strength of VICO-Screen.
  • High flow rate of the liquid, meaning that machinery of smaller dimensions but with the same performance of larger ones can be produced.

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