Journal
BIORESOURCE TECHNOLOGY
Volume 342, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.126003
Keywords
Microalgae cultivation; Landfill leachate; Co-culture; Lipid production; Pollutant removal
Funding
- National Key R&D program of China [2019YFD1101300, 2019YFC1803405]
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The study found that landfill leachate with a 10% dilution rate was optimal for microalgae growth, showing higher biomass growth and nutrient removal efficiency. In this condition, co-culture microalgae demonstrated improved cell activity and nutrient utilization efficiency.
In this study, landfill leachate was pre-treated with NaClO, and then diluted to 5%, 10% and 15% for microalgae growth of Chlorella vulgaris and Scenedesmus dimorphus in the mono- and co-culture modes to investigate the nutrient removal and growth characteristics of microalgae. The results revealed that landfill leachate with the 10% dilution rate was conducive for microalgae growth and exhibited robust biomass growth and the highest nutrient removal efficiency. The co-culture biomass in 10% landfill leachate achieved 0.266 g/L within 10 days and demonstrated the improved nutrient utilisation efficiency of microalgae. In addition, the chemical oxygen demand, ammonia nitrogen, total nitrate and total phosphorus removal efficiencies accordingly reached 81.0%, 80.1%, 72.1% and 86.0% in 10% landfill leachate. Meanwhile, both the enzyme activity and fluorescence parameters proved that the cell activity of co-culture was higher than that of mono-culture.
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