Removal of Nutrients from Fertilizer Plant Wastewater Using Scenedesmus sp.: Formation of Bioflocculation and Enhancement of Removal Efficiency

Table 3

Flocculation activity and removal efficiency with different initial microalgae concentration.

Initial microalgae concentration	Flocculation activity (%)	Removal efficiency (%)
		Ammonium	Nitrate	Phosphate	TP	COD	BOD5
Control		21.1 ± 1.4	−14.9 ± 3.3	17.5 ± 2.1	26.8 ± 2.7	28.1 ± 2.0	16.4 ± 1.1
10 mg/L	14.2 ± 1.8	71.7 ± 1.9	62.2 ± 2.8	94.7 ± 1.5	75.0 ± 3.6	73.5 ± 3.4	65.2 ± 1.4
20 mg/L	23.7 ± 4.3	74.1 ± 2.1	64.6 ± 3.0	94.5 ± 2.3	74.7 ± 1.9	78.4 ± 2.4	67.7 ± 1.8
30 mg/L	51.6 ± 2.3	77.9 ± 2.7	65.6 ± 3.1	96.9 ± 2.8	78.3 ± 2.2	79.5 ± 4.4	68.4 ± 3.0
40 mg/L	81.5 ± 5.7	92.3 ± 4.3	81.5 ± 3.6	94.4 ± 2.2	92.9 ± 1.9	90.4 ± 4.1	82.3 ± 4.1
60 mg/L	88.3 ± 4.1	92.8 ± 3.5	83.6 ± 4.5	97.0 ± 1.7	95.8 ± 2.8	92.6 ± 4.0	83.7 ± 2.3