Improving Biomethanation of Chicken Manure by Co-Digestion with Ethanol Plant Effluent
| Autor: | Jinsu Kim, Changsoo Lee, Jeffrey Todd Harvey, Dae-Yeol Cheong |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
anaerobic digestion
animal structures 020209 energy Health Toxicology and Mutagenesis chicken manure 02 engineering and technology 010501 environmental sciences 01 natural sciences Ammonia chemistry.chemical_compound Bioreactors Nutrient 0202 electrical engineering electronic engineering information engineering co-digestion Animals Anaerobiosis Effluent co-substrate 0105 earth and related environmental sciences Ethanol Chemistry Communication Continuous reactor Public Health Environmental and Occupational Health Pulp and paper industry Manure Anaerobic digestion Biofuel Chicken manure ethanol plant effluent Chickens Methane Anaerobic exercise |
| Zdroj: | International Journal of Environmental Research and Public Health |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph16245023 |
| Popis: | As the global production of chicken manure has steadily increased, its proper management has become a challenging issue. This study examined process effluent from a bioethanol plant as a co-substrate for efficient anaerobic digestion of chicken manure. An anaerobic continuous reactor was operated in mono- and co-digestion modes by adding increasing amounts of the ethanol plant effluent (0%, 10%, and 20% (v/v) of chicken manure). Methanogenic performance improved significantly in terms of both methane production rate and yield (by up to 66% and 36%, respectively), with an increase in organic loading rate over the experimental phases. Correspondingly, the specific methanogenic activity was significantly higher in the co-digestion sludge than in the mono-digestion sludge. The reactor did not suffer any apparent process imbalance, ammonia inhibition, or nutrient limitation throughout the experiment, with the removal of volatile solids being stably maintained (56.3–58.9%). The amount of ethanol plant effluent appears to directly affect the rate of acidification, and its addition at ≥20% (v/v) to chicken manure needs to be avoided to maintain a stable pH. The overall results suggest that anerobic co-digestion with ethanol plant effluent may provide a practical means for the stable treatment and valorization of chicken manure. |
| Databáze: | OpenAIRE |
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