Municipal wastewater

Facing challenges with screenings or grit removal efficiency? Looking for reliable fine screening solutions to protect downstream processes? Need compact, low-footprint solutions for tertiary filtration? Trying to reduce sludge volume and cut disposal costs? Looking to optimize thickening, dewatering, or drying performance?

At ANDRITZ, we have the largest range of technologies available to handle these challenges. Therefore, we are able to advise and support you in selecting the right technology for your project. Many parameters can influence the design and operations of a wastewater treatment plant, but often the most critical parameters are the local conditions.

We, at ANDRITZ, can take these conditions into account, evaluate them with you and only then help you select technology. This product agnostic path is the safest most efficient one to ensure that your plan will be equipped with long-term performing and reliable technology. We support you in finding the right solution and the most suitable product for your needs. With a wide range of technologies, we offer tailored advice and reliable expertise to ensure optimal results.

We are proud of being able to deliver more wastewater treatment technologies than any other supplier, covering the entire wastewater and sludge treatment process (all from liquid sludge to dried Class A biosolids), including three thickening technologies, four dewatering technologies, and four drying systems, together with a complete range of in-house screening, ancillaries as well as proven service and automation technologies.

Do you have questions?  Get in contact with us!   

Where we fit into your wastewater plant – From single technologies to complete solutions

Screening, thickening, dewatering, drying, or combustion. Wherever there´s a separation challenge, we provide a complete system solution to solve it, backed up with process knowledge and in-house automation expertise to make the most of your investment.


Do you have questions?  Get in contact with us!   

Screening technologies

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HydraSieve – static screen

- Unequal efficiency on flat or fibrous material

- Minimum control and maintenance

- Low investment and operating costs

ANDRITZ Aqua-Screen fine screen

Aqua-Screen coarse and fine screening solutions

- Bi-dimensional separation

- Unmatched lifting capacities (dimensions/quantity)

- Low headloss

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Rotating screen

- Pre-treatment unit

- Fully enclosed, stand-alone unit

- Easy maintenance with built-in washing system

SpiroGrit classifier & washer

Grit classifier and washer

- High grit particles capture rate (95% minimum)

- Combo unit

- Fully enclosed

Tertiary treatment solutions

ANDRITZ Underdrain system

Underdrain gravity filter

- Optimized filtration cycle times with low initial headloss

- Possibility to increase filtration velocities (up to 10 m/h)

- High open area thanks to wedge wire (ex 10,7% for 300µm)

Hydrasand

Hydrasand continuous backwash sand filter

- Continuous operation and cleaning

- Adaptable sand bed depth for high performances

- Minimum maintenance cost & energy requirements

Hydradisc gravity disc filter

Gravity disc filter

- High hydraulic throughput capacity on a small footprint

- Gravity system with low headloss, no lifting of wastewater required

- Significant reduction of filterable solids, COD, BOD, phosphorus

Sludge thickening solutions

PowerDrain gravity belt thickener

Belt thickener

- Largest filtration area of the market

- Tracking automatic pneumatic system to increase belt life time

- Advanced RheoScan solution for automatic control of unit and low polymer consumption

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Drum thickener

- The most compact thickening system on the market

- Low maintenance and minimal supervision required

- Entirely closed system to avoid odors and mist

- Outlet solids up to 10 %

ANDRITZ decanter centrifuge D for the environment industry

Decanter centrifuge

- High flow rates of >150 m³ /h without polymer

- Outlet solids >4% DS

- Automated control of flow and outlet solids

Sludge dewatering solutions

ANDRITZ decanter centrifuge D for the environment industry

Decanter centrifuge

- Fully automated operation

- Optimized energy consumption

- Best capacity-to-footprint ratio

Low-profile ANDRITZ belt press

Belt filter press

- Large range from low to high pressure

- Highest capacity

- Simple operation with low profile design

C-Press screw press for efficient sludge dewatering

Screw press

- Lowest energy consumption

- Completely enclosed design

- Maintenance friendly

ANDRITZ Filter press

Filter press

- Fully automated operations with scraping robot

- Highest cake dryness

- Low use of chemicals / polymer

Sludge drying solutions

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Paddle dryer

- Full drying to >90% DS, producing Class A final product

- Smallest footprint

- 200–5,000 kg/h water evaporation per unit

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Belt dryer

- Full drying to >90% DS, producing Class A final product

- <5% dust content in final product

- Low grade waste heat as heating medium

ANDRITZ fluid bed dryer

Fluid bed dryer

- Full drying to >90% DS, producing Class A final product

- 1,000–10,000 kg/h water evaporation per unit

- Fully automated operation

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Drum dryer

- Full drying to >90% DS, producing Class A final product

- 3,000–14,000 kg/h water evaporation per unit

- <5% dust content in final product

- Waste heat recovery possible

Process optimization

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Metris addIQ RheoScan (for belt filter presses and belt tables)

- Real-time, automatic adjustment of polymer dosage

- Cost savings due to reduction of polymer consumption up to 40%

Metris addIQ ARGOS

Metris addIQ ARGOS (for decanter centrifuges and screw presses)

- Real-time, automatic adjustment of polymer dosage

- Cost savings due to reduction of polymer consumption up to 25%

Mobile solutions (plug & play)

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Mobile filtration unit

- Capacity 100 m³/h

- Open gravity filter with ANDRITZ Underdrain System (AUS)

- Filtering media: Sand, CAG, and others

ANDRITZ screw press C-Press for sludge dewatering

Mobile dewatering units

- Can be fitted with the right dewatering technology for your project

- Compact, easy transportable, plug&play system

- Facilitates operator access

- Fully automated

Do you have questions?  Get in contact with us!   

Our wastewater treatment solution packages give you the flexibility to choose the best individual equipment or a complete system for improved process performance. All components, electrical and automation systems, and services are optimized to your requirements, forming a complete process solution from a single source.

Rather than pushing a particular technology, we start by applying extensive in-house knowledge to analyzing your process requirements. Through in-depth consulting and testing, we identify which of our systems will deliver the best results. Collectively, this depth of experience amounts to more than 10,000 wastewater references, including more than 350 new municipal installations every year.

Download area
  • Process expertise for sustainable municipal wastewater solutions PDF : 1.5 MB
  • ANDRITZ sludge drying systems PDF : 3.7 MB
  • ANDRITZ Service level agreements

    Long-term partnership for your secured process availability

    PDF : 1.7 MB

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