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

AMB Express

Table 4 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 and dry weight concentration (n=3, ±SE) after four days of C. reinhardtii grown in daylight or 70% daylight (shaded)

				Dry weight increase
CO₂treatment	Light	pH	Dry w. (mg l^-1)	g m^-2day^-1	g mol^-1
2.6% C	Shaded	7.19±0.1	815±45	11.6±0.6	1.00±0.06
2.6% C	Daylight	7.1±0.0	762±43	12.4±0.7	0.72±0.04
2.5% Fl	Shaded	7.1±0.1	960±18	14.3±0.7	1.23±0.06
2.5% Fl	Daylight	7.1±0.1	935±45	14.6±0.3	0.85±0.02
6.7% Fl	Shaded	6.8±0.1	867±83	11.9±0.7	1.03±0.06
6.7% Fl	Daylight	6.7±0.1	780±46	13.2±1.3	0.76±0.07
11.4% Fl	Shaded	6.5±0.1	792±32	12.1±0.6	1.05±0.05
11.4% Fl	Daylight	6.4±0.2	797±41	12.1±0.5	0.70±0.03
F-value and significance level:
CO₂		110***	5.14*	5.14*	5.31**
Light		3.00	1.49	1.49	79.9***
CO₂ x Light		1.00	0.36	0.36	0.63

The mean productivity during the four days of the experimental period was calculated as g dry weight production per m² and day and as g dry weight produced per mol of photosynthetic active radiation.
For significance levels see Table 2 footnote.