Microwave treatment of dairy manure for resource recovery: Reaction kinetics and energy analysis |
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Authors: | Asha Srinivasan Ping H Liao |
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Institution: | Department of Civil Engineering, University of British Columbia, Vancouver, British Columbia, Canada |
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Abstract: | A newly designed continuous-flow 915 MHz microwave wastewater treatment system was used to demonstrate the effectiveness of the microwave enhanced advanced oxidation process (MW/H2O2-AOP) for treating dairy manure. After the treatment, about 84% of total phosphorus and 45% of total chemical oxygen demand were solubilized with the highest H2O2 dosage (0.4% H2O2 per %TS). The reaction kinetics of soluble chemical oxygen demand revealed activation energy to be in the range of 5–22 kJ mole?1. The energy required by the processes was approximately 0.16 kWh per liter of dairy manure heated. A higher H2O2 dosage used in the system had a better process performance in terms of solids solubilization, reaction kinetics, and energy consumption. Cost-benefit analysis for a farm-scale MW/H2O2-AOP treatment system was also presented. The results obtained from this study would provide the basic knowledge for designing an effective farm-scale dairy manure treatment system. |
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Keywords: | MW/H2O2-AOP dairy manure reaction kinetics energy consumption ortho-P release |
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