A Comprehensive Study on the Physicochemical Characteristics of Faecal Sludge in Greater Accra Region and Analysis of Its Potential Use as Feedstock for Green Energy

Table 4

Summary results for heavy metals composition of the faecal sludge.

Parameter	Unit	Public				Private				Composite
		Mean	SD	Min	Max	Mean	SD	Min	Max	Mean	SD	Min	Max
Cu	mg/kg	0.028	0.002	0.024	0.030	0.021	0.0005	0.018	0.020	0.024	0.004	0.018	0.026
Zn	mg/kg	0.085	0.010	0.074	0.094	0.042	0.012	0.058	0.068	0.070	0.011	0.068	0.082
Co	mg/kg	0.014	0.008	0.010	0.018	0.009	0.001	0.008	0.010	0.011	0.012	0.009	0.015
Cr	mg/kg	<0.01	0.00	<0.01	<0.01	<0.01	0.00	<0.01	<0.01	<0.01	0.00	<0.01	<0.01
Mo	mg/kg	0.0084	0.002	0.0069	0.009	0.0028	0.0012	0.0035	0.0049	0.007	0.0021	0.0059	0.0086
Ni	mg/kg	0.006	0.001	0.004	0.007	0.003	0.0005	0.001	0.004	0.004	0.0012	0.003	0.006
As	mg/kg	0.008	0.001	0.003	0.010	0.002	0.0007	0.001	0.003	0.005	0.0018	0.002	0.007
Pb	mg/kg	0.007	0.001	0.005	0.010	0.004	0.0010	0.002	0.007	0.006	0.0021	0.004	0.008