Hans Huber AG manufactures under license of Parkson Corporation the CONTIFLOW® Sandfilter CFSF which has proven its benefits in hundreds of filter plants and various fields of application.

Filtration technology is typically used for separation of material from various media.  Physical separation of suspended material in wastewater treatment is typically combined with physical-chemical and/or biological elimination mechanisms.  Table 1 shows several filtration technologies.

The most common fields of application of the CONTIFLOW® Sandfilter are wastewater treatment, water treatment and recycling in the following branches:
Paper and pulp industry, food industry, chemical industry, iron and steel industry, mining, surface treatment industry, municipal water works and sewage treatment works.

The CONTIFLOW® Sandfilter can be used for the following applications:

• As an intermediate treatment stage in the process chain to obtain wastewater that contains as little solid material as possible, e.g. prior to activated carbon absorption, ion exchanger or membrane filtration.
• As a final treatment stage to reduce the concentration of suspended material.
• As a biological intensified filtration for advanced elimination of organic substances or denitrification.
• For elimination of substances, organic pollutants and refractory material which are difficult to eliminate biologically by using adsorptive substances, such as powders combined with coagulant agents. The CONTIFLOW® Sandfilter is a continuously backwashed sand filter.  Costs for additional wash water and sludge liquor tanks are eliminated. Also the measuring and automatic control devices are simple compared with discontinuous systems.