Two Mud Cat Mud Cat™ Dredges remove biowaste and fiber sludge

The Recyclers at the Korsnäs plant

The recycling process in brief:

Dredging: Two dredges from Mud Cat's Mud Cat™ Division remove biowaste and fiber sludge from sediments in the Korsnäs purification basins. Dredging is operated by NCC Milman.

Dewatering: The dewatering facility removes 95-97% of the water content of the sludge in dewatering tables and a sieve-belt press. High retention is obtained along with high hydraulic flow. Dewatering is operated by USF Aquaflow.

Fuel preparation: The sludge is spread out on working areas where it is dried by the sun and wind. The sludge is processed when the temperature is above freezing and harvested during the summer months with a dry content of 60-80%. A certain amount of dry material is composted for processing various soil additives. Fuel preparation is operated by Econova.

Combustion: Combustion is handled by Karskär Energy AB where the energy content of the dried sludge can be utilized for Korsnäs processing.

Ash management: The ash produced during combustion is used as a construction material in the fuel preparation process.

The Recyclers’ business concept is to offer a total solution in which various waste products from the forestry industry are processed and refined for subsequent utilization as energy sources for industries and communities.

Återvinnarna - The Recyclers
Korsnäs first with outsourcing

The Recyclers take complete responsibility for waste product management at the Korsnäs plant. This means that valuable biofuel can be created from waste products that were previously discarded.

"It's even cheaper than when we just heaped everything up because the disposal taxes would amount to up to SEK 100 million a year. Outsourcing waste treatment is a good solution for us," says Hans-Gösta Henriksson, environmental engineer at Korsnäs.

Recycling facility in operation
At the Korsnäs plant, The Recyclers have planned and built a facility for treatment of biowaste and fiber sludge from Korsnäs AB. The facility began operation in September 1999, after which The Recyclers have operational responsibility for a period of 10 years.

At the Korsnäs plant The Recyclers produce biofuel and enriched soil from the sludge processors. The Recyclers also handle the ash produced in burning the biofuel in the bark boiler at Korsnäs. So Korsnäs completely avoids the sludge disposal fees that took effect in 2000.

By having The Recyclers take over this function, Korsnäs gets access to an environmental improvement process without loading its bottom line with new investment. This meant low financing costs as well as a facility with an optimized operating efficiency and an excellent working environment.

The Recyclers cooperated on this project with NCC, Milman, USF Aquaflow, Mud Cat International, Econova, and with Nordbanken Finance for financing.

You're welcome to contact

The Recyclers
For further information
by telephone: +46-8-655 11 91 or by fax at +46-8-655 12 91

NCC Facilities
NCC Facilities and our specialties are represented all over Sweden. Specialist capabilities for environmental dredging are based in Kalmar and Ljungsbro. You can contact us by telephone at +46-480-47 64 26 or +46-13-637 55, or call your local NCC representative.
NCC FACILITIES
170 80 SOLNA
Sweden
Telephone: +46-8-655 20 00 Fax: +46-8-624 05 19
http://www.ncc.se

Excerpted from NCC Milman Brochures