Leading the biotech revolution
in wastewater and biogas


Looking for reliable and cost-effective continuous sand filtration? ASTRASAND® COMPAQT is recognized and used worldwide as the most efficient way to clean or polish municipal and industrial wastewater. With the lowest up-front investment costs and lowest operating costs, this continuous sand filter for water polishing is the most economic and compact choice compared to any conventional sand filter.

The benefits of the ASTRASAND® COMPAQT

  • ASTRASAND® sand filtration is used in more than 350 facilities for continuous sand filtration of many types of wastewater, with unit capacity varying from only a few to several thousand m3/hour.
  • It is a highly efficient system. Interruptions are eliminated through the continuous self-cleaning process of ASTRASAND® COMPAQT, in which the filter bed is cleaned during the filtration operation.
  • It is a highly reliable system, which offers a short lead time and a better sand velocity distribution than conventional sand filters.
  • With a non-metal tank and use of materials that are resistant to chemicals and corrosion, it also offers lower operational and maintenance costs.
  • Small footprint – easy to install in larger treatment systems.

Continuous sand filtration for all types of water

The continuous sand filter ASTRASAND® COMPAQT is developed for different types of water, such as process, waste, surface, cooling and groundwater.

  • Polishing of municipal and industrial waste water
  • Reuse of water, in combination with polishing, membrane filtration and disinfection
  • Direct filtration of surface water with in-line flocculation
  • Aerobic biological purification of water, e.g. for MAC and PAC degradation
  • Wash water treatment in drinking and process water production processes
  • (Biological) side stream filtration of cooling water


ASTRASAND® COMPAQT compared to the original ASTRASAND®

Lowest investment costs:

  • 30% reduction in height
  • Lower cost of ancillary materials
  • Shortest lead time
  • Flexible size range

Highly efficient, reliable system

  • Better sand velocity distribution
  • Low risk of plugging
  • Worldwide proven filtration process
  • Stable performance

Lowest operating costs

  • 20% lower energy consumption
  • Reduced life cycle cost
  • Chemical and corrosion resistant materials
  • Lower maintenance costs
  • Better carbon footprint


At Paques, we believe in a cleaner, more sustainable world where innovation in biotechnology plays a crucial role in managing our planet's resources wisely.

If you have any questions or wish to explore what Paques technologies can do for your operations, we encourage you to connect with our team of experts. Our knowledgeable professionals are ready to assist you, offering insights and guidance tailored to your specific needs.

Leading the biotech revolution in wastewater and biogas

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Thank you for reaching out to Paques

Your inquiry is important to us, and we are eager to assist you in exploring our innovative solutions for biological wastewater and gas treatment.

A member of our expert team will be in touch shortly to discuss your specific needs and how Paques can help you achieve your environmental and operational goals.

We look forward to collaborating with you and hope to build a cleaner, more sustainable world together.

Warm regards,
The Paques Team