ALDRUM
The Alfa Laval ALDRUM system is ideal for thickening of municipal or industrial sludge prior to digestion or dewatering, and for reducing sludge volume prior to storage or transportation.
Compact, robust and efficient
- Long-lasting filter cloth
- Intermittent flushing saves water
- Gentle treatment of flocculated sludge feed saves polymer and gives high recovery
- Safe design with bolted, hinged cover
- Clean, enclosed, low-odor solution
How it works
The ALDRUM drum thickener works on the principle of conveying polyelectrolyte treated sludge (a.k.a. flocculated sludge) through a slowly rotating drum filter. The sludge remains in the drum, while the water phase passes through the filter cloth.
The ALDRUM can be adjusted to suit individual sludge thickening needs. It is possible to achieve the most efficient thickening by varying the feed rate, the polymer type and dosage, the drum speed, and the spraying interval. The most cost-effective flocculation and polymer dosage is achieved by installing a flocculation reactor and/or mixing valve upstream of the actual drum thickener.
The ALDRUM can be used in industrial (such as pulp and paper) or municipal wastewater sludge thickening applications prior to digestion or dewatering, and for reducing sludge volume prior to storage or transportation.
Meeting your exact requirements
A selection of auxiliary equipment is available for the complete ALDRUM range:
- Mixing valve: Ensures thorough mixing of polymer and sludge. Can be installed directly on to the drum thickener inlet or before the flocculation reactor
- Flocculation reactor: Simple open reactor that kick-starts the creation of large and strong flocks. Can be installed directly onto the drum thickener inlet
- Sludge hopper: Leads the thickened sludge to the sludge pump in a controlled and efficient manner
- Control panel: All-in-one control solution. Control of the plant’s feed pump, sludge pump and polymer pump, as well as the drum thickener, the level in the flocculation reactor and the sludge hopper
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Lab and pilot testing for municipal and industrial water and wastewater
Alfa Laval has a full testing lab to determine the best solution for achieving the sludge thickening and dewatering results you need. Pilot testing also available.
Solutions for the Circular Economy
More and more wastewater treatment plants are discovering the benefits of a circular, holistic approach to wastewater treatment. Cost savings, reduced environmental impact and new income streams from recovered resources are but a few. Every wastewater treatment plant is unique and has its own set of challenges and opportunities. With our expertise in processing and our broad range of products, we can support your shift to a circular resource flow. Regardless of whether you are a contractor, designer or plant operator we can help you find the optimum solution for your specific project.
How can we help?
With industry-leading wastewater technology and expertise based on the experience of thousands of installations, we can help analyze your unique situation and select the optimal equipment model, configuration, and services for your needs and budget. Get in touch by submitting a general inquiry using the contact form below.