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Effluent polishing

The biological or secondary treatment is often followed by a tertiary treatment (post treatment).
Depending on whether the treated water is discharged or reused, AAQUA NV knows how to secure the desired water quality by applying the right post treatment techniques.
Sand filtration followed by ultrafiltration and reverse osmosis are examples of post treatment techniques that are applied for water reuse.
Hereby, ultra pure water can be produced for reuse as boiler feed water, cooling tower water and demineralized water.
These methods can also bring the levels of suspended solids and salts to ultra-low levels and drastically reduce the amount of pathogenic germs.

An AAQUA-DAF effluent polishing flotation or a sand filter are proven technologies to deal with specific discharge regulations for so-called "difficult waters".