The effect on growth of Chlamydomonas reinhardtii of flue gas from a power plant based on waste combustion

AMB Express

Table 2 The effect of different CO ₂ concentrations supplied by flue gas (Fl) and one concentration supplied by pure liquid CO ₂ gas (C) on pH, O ₂ concentration in the culture and dry weight concentration (n=3, ±SE) after 3 and 5 days of C. reinhardtii grown at 75 and 300 μmol m ^-2 s ^-1 PFD

		Day 3			Day 5		Mean dry weight production
		Day 3			Day 5		Day 0 - 3
CO₂treatment	PFD	pH	O₂(mg l^-1)	Dry w. (mg l^-1)	pH	Dry w. (mg l^-1)	mg l^-1day^-1	g m^-2day^-1	g mol^-1
2.6% C	75	7.1±0.0	7.5±0.2	798±27	6.9±0.1	1360±149	266±9	16.2±0.6	2.50±0.09
2.6% C	300	7.0±0.1	8.3±0.1	3297±46	6.8±0.1	3040±94	1099±15	67.0±0.9	2.59±0.04
2.5% Fl	75	7.3±0.1	7.8±0.4	877±84	7.1±0.1	1338±88	292±28	17.8±1.7	2.74±0.26
2.5% Fl	300	7.0±0.0	8.5±0.1	3527±48	6.8±0.1	3423±91	1175±16	71.7±0.9	2.77±0.04
6.7% Fl	75	7.0±0.1	7.0±0.3	845±36	6.6±0.1	1343±70	282±12	17.2±0.8	2.64±0.12
6.7% Fl	300	6.7±0.0	7.5±0.2	3663±124	6.4±0.2	3343±91	1221±41	74.5±2.5	2.89±0.10
11.4% Fl	75	6.8±0.1	6.4±0.2	777±14	6.5±0.1	1147±23	259±5	15.8±0.3	2.43±0.04
11.4% Fl	300	6.7±0.1	7.3±0.2	2933±36	6.5±0.1	2843±45	978±12	59.6±0.7	2.30±0.03
F-value and significance level:
CO₂		64.5***	50.9***	17.6***	25.6***	3.54*	17.6***	17.6***	5.73**
PFD		91.1***	77.4***	3512***	10.7**	403***	3511***	3511***	0.51
CO₂ x PFD		3.79*	0.59	10.9***	1.32	1.25	10.9***	10.9***	0.89

The productivity during the first three days was calculated as the increase in culture concentration, in g dry weight production per m² and day, as well as in g dry weight produced per mol of photosynthetic active radiation. F-values and significance levels are stated as follows: *p<0.05; **p<0.01; ***p<0.001.