Pre-treatment / Screening solutions

ANDRITZ pre-treatment solutions ensure reliable and efficient solids removal at the very first stage of wastewater treatment. Instead of viewing screening as a standalone component, ANDRITZ integrates screens, grit removal, and compacting technologies into complete solutions that protect downstream equipment, improve biological treatment performance, and reduce environmental impact. With screening efficiencies of up to 99%, the portfolio covers everything from static and coarse screens to fine screens and rotating drum units, suitable for small village installations as well as large metropolitan plants.
The range includes simple, low-maintenance static screens, high-performance coarse and fine screens from the Aqua-Screen family, and robust multirake systems for demanding applications. Modular designs and self-cleaning features ensure low headloss, high capture efficiency, and minimal operating costs. For fully enclosed and space-saving installations, Girapac and Girasieve rotating drum screens provide complete pre-treatment in a compact, plug-and-play unit, including washing, conveying, compacting, and optional bagging of screenings.
To complete the pre-treatment line, the SpiroGrit grit classifier and washer deliver high-efficiency grit removal while minimizing organic content, available also as a combined compact unit requiring no civil works. Together, these solutions offer reliable separation performance, easy maintenance, and long-term operational stability—supporting cleaner water, smoother plant operation, and compliance with stringent treatment standards.