Abstract
The paper presents a case-based comparison of energy
balances and costs of municipal wastewater sludge process
chains based on anaerobic digestion or incineration. In
chains based on anaerobic digestion, several biogas
utilisation options were studied. In addition, the
potential of enhancing anaerobic digestion e.g. by
converting the process to thermophilic was studied. Based
on the results, sludge incineration was the most
expensive option of the studied scenarios, but justified
if the heat generated can be utilised in district
heating. However, the electricity balances in both
incineration and anaerobic digestion are close to one
another. If anaerobic digestion is used, both from an
economical and energy point of view, the best option is
to feed the generated biogas to a gas engine to produce
electricity and heat. Based on the calculations,
thermophilic anaerobic digestion can improve the economy
of a WWTP provided that the biogas yield is sufficiently
higher than in a mesophilic process.
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | Third International Symposium on Energy from Biomass and Waste, Venice 2010 |
| Publisher | Cisa Publisher |
| ISBN (Print) | 978-8-8626-5008-3 |
| Publication status | Published - 2010 |
| MoE publication type | A4 Article in a conference publication |
| Event | Third International Symposium on Energy from Biomass and Waste, Venice 2010 - Venice , Italy Duration: 8 Nov 2010 → 11 Nov 2010 |
Conference
| Conference | Third International Symposium on Energy from Biomass and Waste, Venice 2010 |
|---|---|
| Abbreviated title | Venice 2010 |
| Country | Italy |
| City | Venice |
| Period | 8/11/10 → 11/11/10 |
Keywords
- anaerobic digestion
- biogas
- sludge treatment
- sludge incineration
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Cite this
Merta, E., & Arnold, M. (2010). Optimised energy recovery from wastewater sludge. In Proceedings: Third International Symposium on Energy from Biomass and Waste, Venice 2010 Cisa Publisher.