Nutrient removal from agricultural drainage water using algal turf scrubbers and solar power
- Source:
- Bioresource technology 2014 v.152 pp. 484-489
- ISSN:
- 0960-8524
- Subject:
- effluents, correlation, animal manures, solar energy, nitrogen, economic costs, drainage channels, scrubbers, phosphorus, raceways, drainage water
- 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 125mg N, 25mgPm−2d−1 at the highest flow rates. Nutrient removal rates were equivalent to 310kgN and 33kgPha−1 over a 7month season. Projected nutrient removal costs ($90–$110kg−1 N or $830–$1050kg−1 P) are >10-fold higher than previous estimates for ATS units used to treat manure effluents.
- Agid:
- 59638
- Handle:
- 10113/59638
- https://doi.org/10.1016/j.biortech.2013.11.027