HUBER Belt Dryer BT Flexible, fully automated medium-temperature solution for reliable sewage sludge drying

Q: "Can thermal energy be extracted from the belt dryer for external processes?"

"Heat recovery (e.g. for heating buildings or digesters) is optionally possible, actively contributes to climate protection and also saves costs. Flow temperatures of up to 70 \u00b0C are possible (depending on dryer size and heat supply)."

Q: "What capacity range does the HUBER Belt Dryer BT cover?"

"Starting at about 3,000 t\/a up to over 200,000 t\/a, HUBER offers tailor-made solutions for drying your sewage sludge."

Q: "What is the intermediate storage tank for dewatered sewage sludge needed for?"

"The intermediate storage decouples the operation of the drying plant from the operation of the dewatering or sewage sludge logistics. The aim is to ensure 24\/7 operation of the drying plant."

Q: "Which heat sources can be used for the belt dryer?"

"Almost all heat sources from a temperature of 70\u00b0C can be used. Waste heat from CHPs or other processes is particularly suitable for the belt dryer. Do you have another energy source? Ask our experts what options are available specifically for your application!"

Q: "Why does HUBER use an extruder for sludge feeding?"

"The advantages of this technology are obvious: The sewage sludge is pressed into an always identical shape and placed on the dryer belt as a well-permeable pile of material. The drying conditions are the same at every point in the pile, which guarantees homogeneous drying of the sewage sludge with a very low dust content in the end product. This completely eliminates the time-consuming and wear-intensive back-mixing of already dried material."

Q: "Why is treatment of the exhaust air necessary?"

"Sewage sludge contains inorganic gases (ammonia and other amines (methylamine, dimethylamine, trimethylamine, indole) and hydrogen sulphide), organic gases (VOCs) and other odour components in the exhaust air. Due to the high temperatures during thermal drying, these substances are stripped out and transferred into the drying air. To prevent odour nuisance in the environment, an exhaust air purification system must be installed."

Create value from waste!

Sewage sludge is the “waste product“ that is generated in sewage treatment plants. Drying the sludge reduces disposal costs and offers the ability to convert the waste to fuel or a fertilizer resource!

Dry, low-dust, disinfected granular biosolids product
Easy and safe to handle
Tailor-made heat utilization concept
Reduced disposal costs

HUBER Belt Dryer BT

HUBER Belt Dryer BT 24

HUBER Belt Dryer BT 20 at the site of a sewage sludge mono-incineration plant

Sludge bunker and pump

Multi-line design of the HUBER Belt Dryer BT for large projects

Heat supply and fans of the HUBER Belt Dryer BT

Condensation stage with heat extraction and fully automatic heat exchanger cleaning

Head piece with integrated automatic belt cleaning

Sludge feeding with HUBER extruder

HUBER extruder for sludge feeding onto the belt

Design sketch: HUBER offers you customised plant solutions. The HUBER Belt Dryer BT uses various waste heat sources and is therefore ideal to be integrated into existing processes

HUBER Belt Dryer BT 16 with integrated maintenance platform

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Design and Function

The HUBER Belt Dryer BT makes waste a valuable resource ...

… in the most efficient way ...

The unique HUBER HELIX air flow system ensures that only the minimum required amount of drying air is blown through the dryer by the ventilators. In combination with the CFD-optimized dryer geometry, an extremely low electrical energy demand is achieved with this air flow system.

The closed process air circulation system with integrated condensation stage reduces the exhaust air volume flow to 3000 cfm / 5,000 m³/h maximum and contributes to keeping down operating costs.

... in the most reliable way ...

The HUBER Belt Dryer BT is designed for fully automatic 24/7 operation. All core components are durable and manufactured in the USA.

The integrated automatic belt cleaning system and the HUBER extruder ensure reliable, trouble-free operation of the dryer. With high safety standards and low drying temperatures ranging from 158°F to 302°F / 70°C to 150°C, the HUBER Belt Dryer BT meets all ATEX requirements, ensuring safe operation at all times.

... in the most comfortable way ...

The electrical control system of the HUBER Belt Dryer BT automatically adjusts to external factors that could affect the drying process, eliminating the need for operator intervention. Additionally, the dryer is designed for easy cleaning and maintenance, allowing a single person to handle these tasks efficiently.

Optional remote maintenance solutions are additionally available to enable system operators to monitor their drying plant from anywhere, or even control and operate it if required via an end device, such as PC, mobile phone or tablet PC.

... in the most sustainable way ...

The consistent use of exhaust heat from processes, such as power generation from sewage gas or biogas, helps reduce both operating costs and CO₂ emissions. Optional heat recovery from the dryer (to heat buildings or digesters) also contributes to the sustainable protection of the environment. The dry granulate produced by the dryer can be used both as fuel and fertilizer.

... in the most clever way ...

The HUBER Belt Dryer BT represents state-of-the-art technology of sewage sludge drying. Maximum energy efficiency, fully automated, and the flexible use of exhaust heat guarantee low operating costs and easy system operation. The dryer can also easily be integrated into existing installations and process plants. Various components of peripheral plant equipment offer maximum flexibility and can be customized to meet specific requirements.

Customized Plant Solutions

HUBER offers you customized plant solutions. The HUBER Belt Dryer BT uses a variety of waste heat sources and istherefore the ideal solution for existing process integration.

Combined with HUBER dewatering systems and HUBER Screw Conveyor Ro8 T, the HUBER Belt Dryer BT offers the customer a reliable complete solution for perfectly tailored sludge treatment.

The HUBER Belt Dryer BT has proven its reliability in many projects worldwide.

Media

Videos and Animations

Video: Sewage Sludge Drying with HUBER Belt Dryer BT

Video: HUBER Belt Dryer BT for municipal sewage sludge drying

Video: Sewage Sludge Drying with HUBER Belt Dryer BT

STP Innsbruck: HUBER Belt Dryer BT 16 including an innovative heat recovery concept and integrated heat extraction into a district heating network

Video: HUBER Belt Dryer BT for municipal sewage sludge drying

Example with two high efficiency installations in Slovenia (Novo Gorica + Novo Mesto)

Downloads

Customer Information and Documents

Brochure: HUBER Belt Dryer BT

More information needed?

Feel free to contact us

FAQ

Frequently Asked Questions

Heat recovery (e.g. for heating buildings or digesters) is optionally possible, actively contributes to climate protection and also saves costs. Flow temperatures of up to 70 °C are possible (depending on dryer size and heat supply).

Starting at about 3,000 t/a up to over 200,000 t/a, HUBER offers tailor-made solutions for drying your sewage sludge.

The intermediate storage decouples the operation of the drying plant from the operation of the dewatering or sewage sludge logistics. The aim is to ensure 24/7 operation of the drying plant.

Almost all heat sources from a temperature of 70°C can be used. Waste heat from CHPs or other processes is particularly suitable for the belt dryer. Do you have another energy source? Ask our experts what options are available specifically for your application!

The advantages of this technology are obvious: The sewage sludge is pressed into an always identical shape and placed on the dryer belt as a well-permeable pile of material. The drying conditions are the same at every point in the pile, which guarantees homogeneous drying of the sewage sludge with a very low dust content in the end product. This completely eliminates the time-consuming and wear-intensive back-mixing of already dried material.

Sewage sludge contains inorganic gases (ammonia and other amines (methylamine, dimethylamine, trimethylamine, indole) and hydrogen sulphide), organic gases (VOCs) and other odour components in the exhaust air. Due to the high temperatures during thermal drying, these substances are stripped out and transferred into the drying air. To prevent odour nuisance in the environment, an exhaust air purification system must be installed.

Case Studies