Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Suitability of fecal sludge from composting toilets as feedstock for carbonization
Autor Hübner, T.; Herrmann, A.; Kretzschmar, J.; Harnisch, F.;
Journal / Serie Journal of Water, Sanitation and Hygiene for Development
Erscheinungsjahr 2019
Department UMB;
Band/Volume 9
Heft 4
Sprache englisch;
POF III (gesamt) R31; T15;
Keywords bio-toilet; compost toilet; dry toilet; fecal sludge: hydrothermal carbonization; pyrolysis
Abstract Composting toilets provide a promising decentralized alternative to sewer based sanitation systems. However, the valorization of fecal sludge from composting toilets (CFS) by conventional technologies is limited. In this study, we evaluated carbonization as an alternative valorization route for CFS, providing a time-efficient, decentral applicable and hygienically safe treatment option. CFS was carbonized using either pyrolysis (at 500 °C for 1 h) or hydrothermal carbonization (HTC, at 200 °C for 4 h). CFS exhibits promising feedstock characteristics, such as high total solids (TS, 21 ± 9%) and low ash content (9 ± 2%TS). HTC of CFS exhibits high char yields (75 ± 7%) while pyrolysis char from CFS exhibits elevated higher heating values (25 ± 2 MJ kg−1) and low ash content (24 ± 5%TS) compared to chars produced from fecal sludge (FS) from other sources. Further calculations showed that FS with low TS amended with sawdust can be used as inexpensive feedstock to achieve energy self-sufficient pyrolysis operation.
ID 22540
dauerhafte UFZ-Verlinkung http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22540
Hübner, T., Herrmann, A., Kretzschmar, J., Harnisch, F. (2019):
Suitability of fecal sludge from composting toilets as feedstock for carbonization
Journal of Water, Sanitation and Hygiene for Development 9 (4), 616 - 626