Title:
Economic Evalutation of Bio-Waste Based Biogas Digestates as Influenced by Post-Treatment Methods
Author(s):
Bechstein, F., Ross, C.-L., Sensel-Gunke, K., Wilken, V., Tietze, M.
Document(s):
Paper
Poster
Abstract:
Bio-wastes containvaluable plant nutrients. After being fermented, the digestates can be used as fertilizers or soil amendments. In the current project VeNGA four products were developed on the basis of anaerobically digested and subsequently composted bio-waste. Compost was sieved (compost fine, product 1), and further treated by pelletizing (product 2) or agglomeration (product 3). From the fourth product impurities like plastic waste were sorted out by hand (compost hand-sorted).For the production and sale of fertilizers and soil amendments a price must be defined. First, the monetary value of the plant nutrients in the four products and the additional worth of the organic substance in form of Humus-Carbonwere evaluated.Secondly, the production costs for the four products were calculated on the basis of actual processing and composting costs and a field trial was conducted in which the four products were tested in comparison to standard mineral fertilization. The results show that the combination of pelletized or agglomeratedbiowaste digestates and mineral nitrogen fertilizer leads to higher yields and higher market performances than mineral fertilization alone. However, due to the costs for composting and agglomeration or pelletization, this way of processing digestates appears to be economically unattractive.
Keywords:
cost analysis, economic aspects, organic waste, biobased products, fertilizer
Topic:
Biomass Resources
Subtopic:
Municipal and Industrial Wastes
Event:
25th European Biomass Conference and Exhibition
Session:
1DV.1.61
Pages:
210 - 214
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-1DV.1.61
Price:
FREE
