Title:
Energetic Comparison of Sewage Sludge Mono-Incineration and Hydrothermal Carbonisation Coupled with Hydrochar Incineration
Author(s):
Waldmüller, W., Herdzik, S., Gaderer, M.
Document(s):
Paper
Poster
Abstract:
This works aimed to compare the energetic implications of a sewage sludge mono-incineration to a system, consisting of a Hydrothermal Carbonisation (HTC) and subsequent mono-incineration. Both scenario were modelled using Aspen Plus and energetically evaluated. The impact of different HTC parameters was evaluated. The Hydrochar show a similar carbon content and calorific, but significantly lower ash content the dewatered sewage sludge. The heat demand of the HTC can be covered by up to 98 % by an efficient heat recovery system. The steam cycle, following the incineration, delivered electric power with an efficiency, based on the fuel input, of 0.7 and 14.7 % without and with HTC, respectively. The truck fuel consumption for transport of dewatered matter to the incineration plant is reduced by 63 %, if the HTC is applied. In conclusion, HTC can contribute to a highly energy efficient thermal treatment of sewage sludge, if a proper heat integration is implemented.
Keywords:
thermochemical conversion, sludge, wastewater treatment, biochar, chemical composition, sewage
Topic:
Biomass Technologies and Conversion to Intermediate Bioenergy Carriers and Products of the Bioeconomy
Subtopic:
Hydrothermal processing
Event:
28th European Biomass Conference and Exhibition
Session:
3BV.3.13
Pages:
585 - 589
ISBN:
978-88-89407-20-2
Paper DOI:
10.5071/28thEUBCE2020-3BV.3.13
Price:
FREE
