Sludge Drying Project Aichaberg 2, Hohenburg

Sludge drying system with biomass heating plant

Project description

Another independent sludge drier went into operation in November 2021 at the site of the existing sludge drier from 2008. The BURKHARDT DRYLINE®, with a capacity of < 50 t/day, and a biomass heating plant with a 2 MW biomass boiler for supplying heat to the belt dryer were installed at the site. The drying system is designed to operate for more than 8,000 hours per year.

The pre-drained sludge is fed just-in-time via a receiving hopper into the belt dryer. Two drive-in silos acting as intermediate buffers provide flexibility. A low-temperature belt dryer is used to dry the sludge. The exhaust air volume of about 30,000 Nm3/h is then cleaned in a chemical wash with a biostage. After drying, the biosolids are loaded onto the trucks with a mechanical loader, weighed and transported away. The sludge is intended to be used in cement plants and energy production facilities.

Key technical data

  • Total sludge recycled (25% DR): approx. 17,000 t/a
  • Dried sludge production (90% DR): approx. 4,700 t/a
  • Feed hopper: 120 m³
  • Drive-in silos as intermediate buffers: 2 x 340 m³
  • Storage for dried sludge: 160 m³

BURKHARDT scope of supply and service

  • Overall planning
  • Building and infrastructure
  • DRYLINE® sludge belt drying, including sludge feeding
  • Ventilation technology
  • Heat supply with biomass boiler
  • Exhaust air treatment
  • Dry goods handling and storage
  • Heating technology piping
  • Electrical and mechanical assembly
  • Drying process control system

Planning support from eta Energieberatung GmbH, Pfaffenhofen a.d. Ilm

  • Obtaining permit applications as well as handling any proceedings with authorities required to simplify the approval procedure in accordance with the Federal Immission Control Act, including all process flow charts, drawings etc.
  • Creating planning documents, descriptions and calculations as well as seeking offers for necessary assessments, such as immission forecasts, stack height calculations and site-specific EIA, among others
  • Review of energy design for typical operating modes
  • Process supervision
  • General information about eta Energieberatung GmbH:

Any questions about the BURKHARDT belt dryer? Get in touch with us!

Your contact for sludge drying: