AI Article Synopsis
- The study focuses on a "Bio-free" method for treating swine wastewater (pH 8.5 or higher) to effectively remove nitrogen and phosphorus.
- The process involves first separating solids and liquids using a centrifuge, followed by iron electrolysis, where iron acts as both the anode and cathode for nutrient removal.
- Results show significant nitrogen removal below 60 mg/l (at Rac above 75%) and phosphorus below 8 mg/l over 3 hours, with nitrogen removal energy efficiency being six times higher compared to treatments using prior biological methods.
Article Abstract
Biological process-free ("Bio-free") treatment of swine wastewater (pH 8.5 or above) for the removal of nitrogen and phosphorus was examined. In this study centrifugal separation of solids and liquids was followed by iron electrolysis, which enables removal of nitrogen and phosphorus when iron is set as the cathode and anode, respectively. The manner in which the treatment efficiency varies according to the current ratio of iron anode to iron cathode (Rac) was investigated. Nitrogen was removed to a level below 60 mg l(-1) in a 3-h treatment when Rac was above 75% and phosphorus was removed to a level below 8 mg l(-1) in the same period, irrespective of Rac. Nitrogen removal efficiency was 60 kWh kg-N(-1) , which is 6 times higher than that of the same electrolytic treatment when used after aerobic biological treatment ("Post-bio").
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| http://dx.doi.org/10.1080/09593332808618809 | DOI Listing |
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