Optimization of simultaneous biomass production and nutrient removal by mixotrophic Chlorella sp. using response surface methodology
| Autor: | Jen-Jeng Chen, Yu-Ru Lee |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Central composite design Nitrogen Swine 020209 energy Industrial Waste Biomass Chlorella 02 engineering and technology Wastewater Biology Waste Disposal Fluid Nutrient Microalgae 0202 electrical engineering electronic engineering information engineering Animals Animal Husbandry Water Science and Technology Biological Oxygen Demand Analysis Chemical oxygen demand Environmental engineering Phosphorus Pulp and paper industry biology.organism_classification Lipids Wetlands Constructed wetland Mixotroph |
| Zdroj: | Water Science and Technology. 73:1520-1531 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2015.626 |
| Popis: | The bioprospecting of potentially mixotrophic microalgae in a constructed wetland was conducted. A locally isolated microalga, Chlorella sp., was grown to determine the effect of temperature, aeration rate, and cultivation time on simultaneous biomass production and nutrient removal from piggery wastewater using central composite design (CCD). The most important variable for the biomass productivity of Chlorella sp. was aeration rate, while that for lipid content and nutrient removal efficiency was cultivation time. Total nitrogen (TN) and total phosphorus (TP) removal efficiencies were higher than that of chemical oxygen demand (COD) from piggery wastewater. The CCD results indicate that the highest biomass productivity (79.2 mg L−1 d−1) and simultaneous nutrient removal efficiency (TN 80.9%, TP 99.2%, COD 74.5%) were obtained with a cultivation temperature of 25 °C, a cultivation time of 5 days, and an air aeration rate of 1.6 L L−1 min−1. Palmitic acid (C16:0) and linoleic acid (C18:2) were both abundant in Chlorella sp. cells under mixotrophic cultivation with piggery wastewater. |
| Databáze: | OpenAIRE |
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