Journal article
Optimization of Aqueous Ammonia Soaking of manure fibers by Response Surface Methodology for unlocking the methane potential of swine manure
Department of Chemical and Biochemical Engineering, Technical University of Denmark1
Center for BioProcess Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark2
PILOT PLANT, Department of Chemical and Biochemical Engineering, Technical University of Denmark3
Swine manure mono-digestion often results to economically non-feasible processes, due to the high dilution and ammonia concentration together with the low degradation rates it presents. The effects of different parameters of Aqueous Ammonia Soaking (AAS) as a pretreatment for improving the digestion of manure fibers when coupled to an ammonia removal step were investigated in this study.
Response Surface Methodology was followed and the influence and interactions of the following AAS parameters were studied: NH3 concentration, duration and solid-to-liquid ratio. The mild conditions found to be optimal (7% w/w NH3, 96 hours, and 0.16 kg/l) in combination to a significant increase of the short term CH4 yield (244% in 17 days), make this pretreatment a promising solution for improving swine manure mono-digestion.
Furthermore, compositional analysis of the manure fibers revealed significant solubilization of hemicellulose, while no lignin removal or loss of cellulose occurred under optimal conditions.
| Language: | English |
|---|---|
| Year: | 2017 |
| Pages: | 509-516 |
| ISSN: | 18732976 and 09608524 |
| Types: | Journal article |
| DOI: | 10.1016/j.biortech.2017.07.147 |
| ORCIDs: | Lymperatou, Anna , Gavala, Hariklia N. and Skiadas, Ioannis |
Anaerobic digestion Aqueous ammonia soaking Manure Pretreatment Response surface methodology
Ammonia Animals Aqueous Ammonia Soaking Lignin Methane Response Surface Methodology Swine Water
