Optimization of anaerobic hydrogen and methane production from dairy processing waste using a two-stage digestion in induced bed reactors (IBR)
| Autor: | Jianming Zhong, Conly L. Hansen, David King Stevens |
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| Rok vydání: | 2015 |
| Předmět: |
Hydraulic retention time
Hydrogen Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element Condensed Matter Physics Pulp and paper industry Methane chemistry.chemical_compound Fuel Technology chemistry Loading rate Methane production Digestion Anaerobic exercise Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 40:15470-15476 |
| ISSN: | 0360-3199 |
| Popis: | This study investigated the effects of pH, temperature and hydraulic retention time (HRT) and organic loading rate (OLR) on hydrogen production from dairy processing waste (DPW) in semi-continuous 60 L pilot induced bed reactors (IBR). Results show pH played a key role on hydrogen production and the optimal pH range was in 4.8–5.5. Digestion under thermophilic temperatures (60 °C) had advantages of gaining higher hydrogen yield and suppressing the growth of methanogens. The optimal OLR was 32.9 g-COD/l-d at HRT of 3 days. Under optimal conditions highest hydrogen yield was 160.7 ml/g-COD removed with 44.6% COD removal. Two-stage digestions demonstrated more energy gain from methane production and further COD removal. The overall gas production in two-stage digestion was 71.7 ml hydrogen and 61.0 ml methane per gram DPW COD. The overall COD removal under optimal conditions was 88.2%. |
| Databáze: | OpenAIRE |
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