Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7079326 | Bioresource Technology | 2014 | 6 Pages |
Abstract
The objectives of this study were to determine nutrient removal rates and costs using solar-powered algal turf scrubber (ATS) raceways and water from an agricultural drainage ditch. Algal productivity using daytime-only flow was 3-lower compared to productivity using continuous flow. Results from this and other studies suggest a non-linear relationship between flow rate and nitrogen removal rates. Nitrogen (N) and phosphorus (P) removal rates averaged 125 mg N, 25 mg P mâ2 dâ1 at the highest flow rates. Nutrient removal rates were equivalent to 310 kg N and 33 kg P haâ1 over a 7 month season. Projected nutrient removal costs ($90-$110 kgâ1 N or $830-$1050 kgâ1 P) are >10-fold higher than previous estimates for ATS units used to treat manure effluents.
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Authors
Patrick Kangas, Walter Mulbry,