Linz-Unkel
Innovative sewage sludge utilisation with phosphorous recovery
Scope
- Design, build, start-up & commissioning of the sludge drying and carbonisation plant, including dewatering unit
- Sludge drying is based on the ELODRY® concept for low-temperature sludge drying
- PYREG® 500 unit for the carbonization process
- Implementing the two technologies in the WWTP with optimal heat efficiency
- Waste air treatment for dryer and carbonisation unit
Technical Data
- Upgrade size: 30,000 PE
- Amount of sewage sludge: Approx. 18,000 m³/a (3-4 % DS)
- Approx. 2,800 t/a dewatered digested sludge
System & Technologies
- New Ishigaki screw press for the dewatering of the digested sewage sludge
- ELODRY® low-temperature belt dryer with extremely low demand for thermal energy, including air treatment
- Tailor-made heat recovery and utilisation concept - Excess heat of the PYREG® process is used for ELODRY® drying process
- PYREG®-plant for the decentralised recycling of sewage sludge and production of a phosphorous-containing carbonisate, including air treatment
- Screw conveyors for dewatered sludge feed to the dryer
- Screw conveyors for dry sludge to the PYREG® unit
- Screw conveyors for dry sludge to the PYREG® unit
Special Features
- With the combination of a low-temperature belt dryer by ELIQUO STULZ GmbH and a carbonisation plant by PYREG GmbH, volumes of sewage sludge are reduced by around 90 % and, at the same time, the sewage sludge is converted fully into a high-quality fertiliser raw material with a high proportion of plant-available phosphorous. The combination is a complete phosphorous recovery solution for wastewater treatment plants.
General Data
Client
Zweckverband Abwasserbeseitigung Linz-Unkel
Completion
Completion: March 2016
Contract value
Contract Value: 1.4 million Euro
