Fig. 1
From: Water reuse and growth inhibition mechanisms for cultivation of microalga Euglena gracilis
Effects of reused water on the growth of E. gracilis. UFM-R0, -R1, -R2, and -R3 represent the number of times water is reused and treated with UFM; The letters F, S, and T combined with 0, 2, 4, 6, 8, and 10 represent the number of days for algae cultivation under the first (F), second (S), and third (T) conditions of reused water, respectively. Asterisk represents p < 0.05; double asterisk represents p < 0.01. The values are represented by mean ± SD, where n = 3