Evaluating Growth and Nitrogen and Phosphorus Removal of Four Microalgae in Different Nutrient Concentrations.

From day 5 to day 15, the NH 4 + removal rates of three groups, i.e., LL, LH, and HH, showed a decreasing trend, while the HL group increased from day 5 to day 10, but decreased thereafter.

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It is noteworthy that all treatment groups showed a trend of decrease initially, but then an increase in the process of NO 3 − removal. 3.3.

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The NH 4 + removal rate of the HH group showed an increasing trend over time, and it always represented the lowest NH 4 + removal rates compared with other groups.

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