ANDRITZ Aqua-Screen - Efficient coarse and fine screening solutions for municipal and industrial wastewater

How to select the right screening technology? One step forward in efficient screening!

Proper screening is the first and one of the most important steps in a wastewater treatment plant (WWTP). Critical parameters must be taken into account when selecting proper screening technology as each application or project is different. The following parameters are critical when selecting the correct equipment: application, flow, load, composition of screenings (sticky, fine, etc.), size of screenings, and so on. With more than 150 years of experience in the design and manufacturing of solid/liquid separation technologies, ANDRITZ can help you find the right solution to meet your specific screening requirements.

Aqua-Screen T and P fine screen, a modular concept for greater flexibility and cost savings

With its modular concept and common frame (less than 30 minutes for complete replacement of filter element), reducing maintenance time and number of different spare parts, the ANDRITZ Aqua-Screen fine screen is a high-tech solution adapted to your needs, integrating all existing screening categories:

• ANDRITZ Aqua-Screen T – Toothing system allows effective, two dimensional fine screening and a lifting capacity (dimensions/quantity) unrivalled on the market; can be adapted to any application (formerly known as Aqua-Guard). It also features an automatic detection of wear on supporting rail (on XL T version only)
• ANDRITZ Aqua-Screen P – Perforated plates system allows circular, two dimensional fine screening – one of the most efficient on the market; can be adapted to most applications

Common frame for ease of maintenance

FRONT DISMANTLING: The ANDRITZ Aqua-Screen fine screen features a frontend access door. The complete rack holding the filter elements can be removed in one step through this access point. This means that downtime is reduced to a minimum, typically taking less than 30 minutes for a field service technician to change the filter elements. In addition to the time saved, this maintenance friendly design, requires much fewer steps and parts to complete the operation of changing the screen filter.

ISM – INTELLIGENT, SIMPLIFIED MAINTENANCE: An innovative maintenance concept has been developed for the ANDRITZ Aqua-Screen fine screen and comes as standard on large models: ISM (Intelligent, Simplified Maintenance). The ISM system allows preventive maintenance by monitoring rail wear and chain tensioning. Sensors inform the operator before failures occur – this not only protects the equipment and plant, but also limits maintenance costs and reduces downtime.

Self-washing, continuous fine screen - the ANDRITZ Aqua-Screen T

With more than 6,000 references delivered over more than 40 years, and recognized as the most efficient headwork screen, the ANDRITZ Aqua-Screen T fine screen is one of the most reliable screening technologies available on the market today.

Benefits of Aqua-Screen T tooth fine screen:

• Pop-out / pop-in modular filter racks that can be replaced easily from the front of the screen with optimum accessibility for ease of maintenance
• Improved teeth design allowing increased screening and lifting capacity
• Improved capture rate
• Optimal efficiency thanks to bi-dimensional separation and unmatched lifting capacities (dimensions/quantity)
• Fewer wear parts means reduced maintenance costs
• Versatility in combination with Aqua-Screen P fine screen (possible to convert from one model to the other to improve the capture rate)
• No submerged bearing for maintenance ease and increased lifetime
• Can be adapted to handle the most challenging applications
• Also available in off-channel, tank-mounted version

High capture rate with ANDRITZ Aqua-Screen P perforated-plate fine screen

Building on our extensive experience with other screening technologies, ANDRITZ has developed the ANDRITZ Aqua-Screen P fine screen, a perforated-plate fine screen. It allows high capture rates of up to 85% – the best level ever achieved for headworks in WWTP.

Benefits of Aqua-Screen P perforated-plate fine screen:

• Circular mesh allowing the best capture rate in fine screening
• Separation in two dimensions for higher capture rate (the same mesh vertically and horizontally)
• Double cleaning system outside the filtration area, allowing optimal efficiency
• Perforated plate has a modular design, thus fewer spare parts are needed and the supply chain is shortened
• Versatility in combination with ANDRITZ Aqua-Screen T fine screen (possible to convert from one model to the other to improve lifting capacity)
• No submerged bearing for maintenance ease and increased lifetime
• Increased cleaning performance thanks to adjustable cleaning brush and bi-directional spray ramp

ANDRITZ Aqua-Screen B fine and coarse screens

The range of Aqua-Screen T and P is completed by a multirake bar screen, the Aqua-Screen B. Aqua-Screen B is a robust vertical bar screen system engineered for efficient separation of suspended solids from wastewater. Designed for both fine and coarse screening, it operates using a series of multi-rakes driven by motorized rolling chains. This mechanism ensures continuous cleaning of the screening surface and reliable transport of captured materials to the upper discharge zone.

Capable of installation in channels up to 3 meters wide and 20 meters deep, Aqua-Screen B adapts to inclinations between 75° and 90°, offering flexibility for a wide range of site conditions. It supports coarse screening with bar spacing from 15 to 80 mm and fine screening from 5 to 12 mm.

Constructed entirely from stainless steel, the system is built for durability and long-term performance. It features HDPE guides with roller chains instead of gear wheels in the lower section, reducing wear and maintenance. Specially designed bumper guards protect the screen bars, ensuring smooth and reliable operation even under demanding conditions.

Many other screening options available

The Aqua-Screen range includes various types of screens, using other technologies, such as:

• ANDRITZ Aqua-Screen S, screw screen compactor: The Aqua-Screen S allows the wastewater filtration and transport of the effluents for the storage, in a practical and efficient package. This screen is a complete variant, with a compactor zone next to the discharge, which allows an important reduction in weight and volume of filtered waste (up to 50% less).
• ANDRITZ Aqua-Screen MBR, rotary drum screw screen: The Aqua-Screen MBR is used for solid-liquid separation for high flow rate and combine two operations: filtration and conveying (a third one is possible, adding a compactor). It is commonly used to be installed before MBR, using 0,8 mm to 2 mm perforated drum.
• ANDRITZ Aquea-Screen M, fed drum screen: The Aqua-Screen M is a single unit handling screening and conveying. This system integrates washing system, and gives the full warranty of a perfect and continuous efficiency of the screen during the filtration of the effluent (diameter size from 600 mm to 1800 mm for more flexibility).

Whatever the requirement, which such a large portfolio, ANDRITZ has the screening technology for your process!

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