ANDRITZ decanter centrifuge D for the environment industry

Sludge centrifuge

The ANDRITZ decanter centrifuge D is engineered with advanced wear-resistant materials, ensuring a long and continuous life cycle. Our diverse material options guarantee that your operations can withstand high temperatures, heavy-duty applications, and corrosive environments. Whether you need dewatering or thickening, our centrifuges can handle wide ranges of flow rates and types of sludge, delivering state-of-the-art separation tailored to your specific inputs, processes, and objectives.

Wastewater treatment methods

For solid-liquid separation processes like thickening and dewatering, this machine provides a reliable, well-established solution, continuously refined to enhance performance, reduce energy consumption, and lower operational costs.

Dewatering

The ANDRITZ decanter centrifuge D offers versatile solid-liquid separation, adaptable to achieve desired dry solids content. It handles both sludge thickening and dewatering from diluted sludge, making it ideal, for example, for processes like pre-dewatering in Thermal Hydrolysis (THP) plants. Its dual functionality allows operation in thickening mode for field spreading and dewatering when spreading is restricted. It’s also effective for pig manure separation, producing clarified liquid with over 80% TSS capture and dewatered solids with the granularity needed for efficient composting.

Thickening

As with all sludge dewatering and thickening technologies, performance of the ANDRITZ decanter centrifuge D is affected by the conditioning process, such as polymer type and dosage.

But unlike other sludge separation technologies, the ANDRITZ decanter centrifuge D can still achieve a high solid/liquid separation rate in many applications without slurry pre-conditioning.

Operating principle of the ANDRITZ decanter centrifuge for the environment industry

Operating principle of the ANDRITZ 3-phase decanter centrifuge

Low power consumption sludge dewatering centrifuge

Leading the way in green technologies, we drive innovation through energy efficiency

Get more results with less energy. ANDRITZ is committed to reduce your operation costs and to save valuable resources by continuously improving the efficiency of our decanters depending on your flow and your application, by providing some additional features:

Key energy-saving features

The High Hydraulic Pressure (HHP) design of the rotating assembly reduces the discharge radius of the clarified liquid (centrate). Besides improved separation characteristics, this design helps to recover the kinetic energy of the fluid to reduce energy consumption by up to 15%.

Working the same way as a jet engine, the TurboJet^TM weir plates recover the remaining kinetic energy of the clarified liquid. By creating liquid jets pointing in the opposite direction to the bowl rotation, the reaction force thus supports bowl rotation. The TurboJet^TM weir plate reduces total power consumption by up to 30% as a stand-alone feature.

As a standard feature, ANDRITZ offers two drive systems: a regenerative back drive and a direct drive. Whereas common back drive systems dissipate the braking energy of the scroll into heat, the regenerative back drive recovers this energy and feeds it back to the main motor. The direct drive system feeds the scrolling power directly to the scroll and therefore avoids recirculation losses, thus reducing total power consumption by another 5%.

The unmatched TurboWISE^TM solution is key to performance in the raw material feed chamber. The polyurethane liners of the TurboWISE^TM system can be replaced easily on site and serve to accelerate the incoming slurry efficiently. The computational fluid dynamic optimization ensures lowest flocculant consumption, significantly reduced wear, and decreases the total power consumption again by up to 2%.

Decanter centrifuge D for efficient sludge dewatering and thickening

A unique application-dependent scroll for efficient sludge dewatering and thickening

Environmental impact, safety, and risk mitigation

The ANDRITZ decanter centrifuge D is designed with a focus on environmental impact and safety. It features low energy consumption, reduced noise, and a design aimed at minimizing vibrations. The machine also includes safety systems like automatic shutdowns in case of malfunction, and it adheres to strict regulatory standards for environmental safety and operational efficiency.

Benefits of the ANDRITZ decanter centrifuge D

Easy and immediate change of process settings due to variable scroll and bowl speeds

Fast dismantling design

Optimum process performance due to adjustable pond depth and automatic control system

Lowest possible machine downtime due to easy, fast, and efficient service and maintenance

High capacity and dryness while using only minimum of additives

High level of wear protection
Minimum footprint requirements due to in-line design results in smaller building footprint so lower total installed costs

Various sludge centrifuge models to meet your needs

	D2	D3	D4	D5	D6	D7	D10	D12
Solid capacity (kg/hr)	800	2,000	3,000	5,000	10,000	15,000	20,000	25,000
Hydraulic capacity (m³/hr)	0.2-15	1-30	3-50	3-80	10-170	20-250	30-370	50-450
Installed power (kW)	7.5-20	10-45	15-60	22-132	55-200	75-245	132-245	160-350

Next generation dewatering equipment - Decanter centrifuge DU

ANDRITZ has developed a generation of decanter centrifuge, bringing you better results than any decanter before: the ANDRITZ decanter centrifuge DU. As a global separation specialist, ANDRITZ has taken a new development step in decanter centrifuges that focuses on performance and benefits for the users in the municipal wastewater market, to handle low concentrated sludge:

High solids dryness: At ANDRITZ, we know that it is essential to obtain the highest possible solids dryness. With the ANDRITZ decanter centrifuge DU, you can expect up to 1% higher dryness than from a conventional decanter.

High capacity: The ANDRITZ decanter centrifuge DU provides up to 20% higher capacity, which will enable you to increase your plant capacity without changing the machine footprint.

Low polymer consumption: Still with the target of improved operating economy, polymer consumption is a key factor in reducing total cost of ownership. In operation, the ANDRITZ decanter centrifuge DU requires 1 kg/TDS less polymer dosage, which results in lower expenses for consumables and allows the polymer dosage to be optimized independently of the decanter operating parameters.

Low energy consumption: Energy consumption is a key element in the process of wastewater treatment. In terms of cost cutting, it is important to ally treatment efficiency with reduced energy consumption. With the ANDRITZ decanter centrifuge DU, save up to 50% more than a traditional decanter centrifuge.

More decanter centrifuges from ANDRITZ

Download

Decanter centrifuge D PDF : 2.4 MB
Decanter centrifuge DU PDF : 248 KB
Metris addIQ control system for decanter centrifuges PDF : 1.6 MB
Metris addIQ ARGOS

Optimize polymer consumption and reduce costs by up to 25%

PDF : 747 KB
ANDRITZ Service level agreements

Long-term partnership for your secured process availability

PDF : 1.7 MB
The key to efficient zero-liquid discharge (ZLD) PDF : 1 MB