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Updated: Feb 15, 2026

Coupling Carbon Capture from a Power Plant with Semi-automated Open Raceway Ponds for Microalgae Cultivation
Published on: August 14, 2020
Operation of a vertical algal biofilm enhanced raceway pond for nutrient removal and microalgae-based byproducts
Qi Zhang1, Xuemei Li2, Dabin Guo3
1School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Abstract:
In this study, a vertical-algal-biofilm-enhanced raceway pond (VAB-enhanced raceway pond) was designed and assessed for wastewater treatment and algal biomass production under different nutrient loading rates. Results indicated that the maximum removal capacity of the system was accordingly 7.52, 6.76 and 0.11 g·m-2·day-1 for COD, TN and TP, under which the wastewater effluent concentration could be respectively reduced from 106.00, 92.71 and 1.48 mg/L to 43.5, 11.03 and 0.46 mg/L in continuous mode. Meanwhile, about 7.47-10.10 t·ha-1·year-1 of lipid, 14.85-23.01 t·ha-1·year-1 of protein and 10.69-14.20 t·ha-1·year-1 of carbohydrate could be produced from the algae by the system in large scale. The corresponding estimated stoichiometric-methane-potential and biodiesel production of the harvested biomass was 21,471-29,136 m3·ha-1·year-1 and 0.57-1.15 t·ha-1·year-1, respectively. The findings of this study demonstrate the feasibility of using VAB-enhanced raceway pond for economically and cost-effectively recovery of nutrients from the wastewater via algal-based byproducts production.
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