Table 2.

The utilization of n-hexadecane at best to produce the efficient bioflocculant when compared with the utilization data of all the petroleum hydrocarbons detected in DCM extracted portion of the subject crude oil.

Hydrocarbons	Time of highest activity (h)	Optimum pH	Optimum concentration (%)	Bioflocculating activity (%)
Aliphatic hydrocarbons
Undecane	48	6	0.5	50.78 @ 0.009
Tridecane	72	6	1.0	64 @ 0.10
Tetradecane	72	6.5	0.5	69.10 @ 0.08
Pentadecane	96	6	1.0	58.4 @ 0.21
Hexadecane	120	7	1.0	87.8 @ 0.02
Heptadecane	72	7	0.5	63.75 @ 0.02
Octadecane	96	6.5	0.75	68.96 @ 0.01
Nonadecane	72	6	0.25	47.5 @ 0.06
Dodecane	96	6	0.5	73.85 @ 0.03
Eicosane	96	7.5	0.75	54.27 @ 0.02
Heneicosane	96	7.5	0.25	43.21 @ 0.03
Tricosane	96	8	0.25	42.78 @ 0.11
Tetracosane	72	8	0.50	52.21 @ 0.14
Pentacosane	96	8	0.25	38.96 @ 0.02
Hexacosane	72	8	0.25	36.14 @ 0.02
Heptacosane	96	8	0.25	33.21 @ 0.02
Octacosane	96	8	0.25	32.14 @ 0.03
Nonacosane	72	7.5	0.25	29.28 @ 0.04
Docosane	72	7.5	0.50	67.21 @ 0.05
Triacontane	72	6.5	0.50	41.85 @ 0.02
Hentriacontane	96	6.5	0.25	13.92 @ 0.034
Dotriacontane	96	6.5	0.50	48.53 @ 0.03
Tritriacontane	72	6	0.50	40.89 @ 0.056
Tetratricontane	96	6	0.25	33.57 @ 0.025
Pentatricontane	96	6	0.25	32.85 @ 0.051
Hextriacontane	96	6	0.25	30.35 @ 0.03
Heptatriacontane	48	6	0.25	28.67 @ 0.015
Pristane	72	7	0.25	18.21 @ 0.02
Phytane	96	7	0.75	24.48 @ 0.025
Aromatic hydrocarbons
Benzene	72	6	0.5	52.82 @ 0.017
Indene	72	6.5	0.25	31.07 @ 0.015
Polyaromatic hydrocarbons
Naphthalene	72	6.5	0.50	64.85 @ 0.03
Phenanthrene	48	6	0.50	52.17 @ 0.015
Fluorene	72	6	0.25	39.03 @ 0.02