Hydrothermal Carbonization of Biosolids from Waste Water Treatment Plant
| Autor: | Richard MacEwen, Prabir Basu, Raj Kumar Dahal, Dhananjay Bhatt, Ankita Shrestha, Bishnu Acharya |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Control and Optimization
Carbon-to-nitrogen ratio Biosolids 020209 energy Energy Engineering and Power Technology 02 engineering and technology 7. Clean energy lcsh:Technology hydrothermal carbonization Hydrothermal carbonization Biogas 0202 electrical engineering electronic engineering information engineering biogas biosolid hydrochar process water Electrical and Electronic Engineering Engineering (miscellaneous) Renewable Energy Sustainability and the Environment Carbonization Chemistry lcsh:T Chemical oxygen demand Pulp and paper industry 6. Clean water Sewage treatment Heat of combustion Energy (miscellaneous) |
| Zdroj: | Energies, Vol 11, Iss 9, p 2286 (2018) Energies; Volume 11; Issue 9; Pages: 2286 |
| ISSN: | 1996-1073 |
| Popis: | The high moisture content of biosolid from a wastewater treatment plant limits its use for agriculture and energy applications. This limitation could be obviated by hydrothermal carbonization, which requires less energy compared to other thermochemical treatment processes, and results in stabilized solid hydrochar product. The present study examined this option by hydrothermally treating the biosolid at three temperatures (180, 200 and 220 °C) for 30 min, and at 200 °C for 15, 30 and 60 min. An increase of 50% in the heating value of the biosolid was obtained after this carbonization. A reduction in the nitrogen concentration in hydrochar was noted with an increase in phosphorus concentration, but potassium concentration remained largely unchanged. Additionally, the carbon to nitrogen ratio in the hydrochar product was higher than the biosolid that makes it suitable for agriculture applications. The chemical oxygen demand of the process water was in the range of 83,000 to 96,000 mg/L. The study thus provides insight into high-value products that can be generated by the hydrothermal carbonization of biosolids. |
| Databáze: | OpenAIRE |
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