An Integrated Approach of Using Polystyrene Foam as an Attachment System for Growth of Mixed Culture of Cyanobacteria with Concomitant Treatment of Copper Mine Waste Water

Table 2

Copper uptake from different concentrations of copper mine waste water by Cyanobacterial biomass after different time intervals in both attachment and suspended growth systems, incubated at 26–30°C and 16/8 h photoperiod in a culture room under 3000 lux from cool white light.

Culture system	Different effluent concentration	Copper uptake (%)*
		Incubation (days)
		6	12	18
Attachment system	20%	26.8±3.31	44.7±3.18	85.6±1.61
	40%	34.2 ± 2.21*	56.9 ± 1.15*	88.9±1.25
	60%	30.4±1.60	42.5±0.91	65.8 ± 1.64*
Suspended system	20%	20.5±1.32	38.2±1.12	70.3 ± 1.54*
	40%	24.8±2.31	45.3 ± 1.12*	74.9±0.85
	60%	19.2 ± 1.41*	28.9 ± 1.99*	53.8 ± 1.27*

Values are represented as mean ± standard deviation of three independent experiments.
The values indicated by (*) are not significantly different from control at 𝑃>0.05, determined by two-way ANOVA followed by post hoc test.
In negative control, copper uptake by polystyrene foam was not detected in all combinations of copper mine waste water and BG-11.