Title:
Energy-Efficient Treatment of Digestates with an Optimised Membrane Process
Author(s):
Gienau, T., Rosenberger, S.
Document(s):
Paper
Slide presentation
Abstract:
The large amount of biogas plants in Germany and the regional gradients of number and size of plants necessitate an adequate conditioning process for digestates. Limitations for the main nutrient fractions of fertiliser are shown with respect to the old and latest fertiliser order (Düngeverordnung). Focus of this work is the total conditioning process for treatment of digestates with the use of membrane technique. As the energy efficiency of the membrane process needs to be improved in order to compete with other separation techniques, the membrane flux behaviour and rheological behaviour of digestate was analysed. The results show the fundamental relation of membrane performance and organic content and the influence of the digestates rheology on energy demand of the ultrafiltration process. Digestate characteristics are shown for 20 different samples of digestates from agricultural biogas plants and 4 samples of bio-waste biogas plants.A final focus on energy demand gives opportunities for potential improvements of the filtration process.
Keywords:
agricultural biogas plants, digestate, manure
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Anaerobic digestion for biogas production
Event:
23rd European Biomass Conference and Exhibition
Session:
2CO.10.3
Pages:
599 - 608
ISBN:
978-88-89407-516
Paper DOI:
10.5071/23rdEUBCE2015-2CO.10.3
Price:
FREE
