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Comparison of high-solids to liquid anaerobic co-digestion of food waste and green waste

Sanati, Mehri LU ; Chen, Xiang and Yan, Wei (2014) In Bioresource Technology 154. p.215-221
Abstract
Co-digestion of food waste and green waste was conducted with six feedstock mixing ratios to evaluate biogas production. Increasing the food waste percentage in the feedstock resulted in an increased methane yield, while shorter retention time was achieved by increasing the green waste percentage. Food waste/green waste ratio of 40:60 was determined as preferred ratio for optimal biogas production. About 90% of methane yield was obtained after 24.5 days of digestion, with total methane yield of 272.1 mL/g VS. Based the preferred ratio, effect of total solids (TS) content on co-digestion of food waste and green waste was evaluated over a TS range of 5–25%. Results showed that methane yields from high-solids anaerobic digestion (15–20% TS)... (More)
Co-digestion of food waste and green waste was conducted with six feedstock mixing ratios to evaluate biogas production. Increasing the food waste percentage in the feedstock resulted in an increased methane yield, while shorter retention time was achieved by increasing the green waste percentage. Food waste/green waste ratio of 40:60 was determined as preferred ratio for optimal biogas production. About 90% of methane yield was obtained after 24.5 days of digestion, with total methane yield of 272.1 mL/g VS. Based the preferred ratio, effect of total solids (TS) content on co-digestion of food waste and green waste was evaluated over a TS range of 5–25%. Results showed that methane yields from high-solids anaerobic digestion (15–20% TS) were higher than the output of liquid anaerobic digestion (5–10% TS), while methanogenesis was inhibited by further increasing the TS content to 25%. The inhibition may be caused by organic overloading and excess ammonia. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
High-solids anaerobic digestion, Co-digestion, Food waste, Green waste, Biogas
in
Bioresource Technology
volume
154
pages
215 - 221
publisher
Elsevier
external identifiers
  • pmid:24398149
  • wos:000331461600030
  • scopus:84891643040
ISSN
1873-2976
DOI
10.1016/j.biortech.2013.12.054
language
English
LU publication?
yes
id
cc2dee41-7039-4495-8b8c-eeb28f468c65 (old id 4275818)
date added to LUP
2014-01-28 16:24:50
date last changed
2017-10-29 03:51:21
@article{cc2dee41-7039-4495-8b8c-eeb28f468c65,
  abstract     = {Co-digestion of food waste and green waste was conducted with six feedstock mixing ratios to evaluate biogas production. Increasing the food waste percentage in the feedstock resulted in an increased methane yield, while shorter retention time was achieved by increasing the green waste percentage. Food waste/green waste ratio of 40:60 was determined as preferred ratio for optimal biogas production. About 90% of methane yield was obtained after 24.5 days of digestion, with total methane yield of 272.1 mL/g VS. Based the preferred ratio, effect of total solids (TS) content on co-digestion of food waste and green waste was evaluated over a TS range of 5–25%. Results showed that methane yields from high-solids anaerobic digestion (15–20% TS) were higher than the output of liquid anaerobic digestion (5–10% TS), while methanogenesis was inhibited by further increasing the TS content to 25%. The inhibition may be caused by organic overloading and excess ammonia.},
  author       = {Sanati, Mehri and Chen, Xiang and Yan, Wei},
  issn         = {1873-2976},
  keyword      = {High-solids anaerobic digestion,Co-digestion,Food waste,Green waste,Biogas},
  language     = {eng},
  pages        = {215--221},
  publisher    = {Elsevier},
  series       = {Bioresource Technology},
  title        = {Comparison of high-solids to liquid anaerobic co-digestion of food waste and green waste},
  url          = {http://dx.doi.org/10.1016/j.biortech.2013.12.054},
  volume       = {154},
  year         = {2014},
}