Comparison of thermophilic anaerobic digestion characteristics between single-phase and two-phase systems for kitchen garbage treatment
| Autor: | Yong-Jin Park, Hiroshi Tsuno, Taira Hidaka, Feng Hong, Jihoon Cheon |
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| Rok vydání: | 2007 |
| Předmět: |
Hot Temperature
Bioengineering Bacillus Garbage Applied Microbiology and Biotechnology Methane chemistry.chemical_compound Bioreactors two phase Anaerobiosis chemistry.chemical_classification single phase biology business.industry methane fermentation Thermophile Chemical oxygen demand thermophilic biology.organism_classification Pulp and paper industry Biotechnology Anaerobic digestion chemistry Fermentation Propionate Degradation (geology) kitchen waste Bacillus coagulans microbial community business |
| Zdroj: | Journal of bioscience and bioengineering. 105(1) |
| ISSN: | 1389-1723 |
| Popis: | Lab-scale single-phase and two-phase thermophilic methane fermentation systems (SPS and TPS, respectively) were operated and fed with artificial kitchen waste. In both SPS and TPS, the highest methane recovery ratio of 90%, in terms of chemical oxygen demand by dichromate (CODcr), was observed at an organic loading rate (OLR) of 15 gCODcr/(l.d). The ratio of particle CODcr remaining to total CODcr in the influent was 0.1 and the ratio of NH(4)-N concentration to the input total nitrogen concentration was 0.5 in both SPS and TPS. However, the propionate concentration in the SPS reactor fluctuated largely and was 2 gCODcr/l higher than that in TPS, indicating less stable digestion. Regardless, efficient kitchen waste degradation can be accomplished in both SPS and TPS at an OLR of20 gCODcr/(l.d), even though TPS may be more stable and easier to maintain. Bacillus coagulans predominated with an occupied ratio of approximately 90% in the acid fermentation reactor of TPS, and then a richer microbial community with a higher Shannon index value was maintained in the methane fermentation reactor of TPS than in the SPS reactor. |
| Databáze: | OpenAIRE |
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