Performance Evaluation of Dry Faecal Sludge-Derived Activated Carbon (DFSAC) for Wastewater Pollutant Removal: A Case Study of the Lavender Hill Faecal Treatment Plant

Table 8

Mean results for the analyzed heavy metal concentrations of Mudor and recycled effluent.

Metal		N	Mudor WWTP effluent				Recycled effluent				% Removal	EPA STD
			Min	Max	Mean	Std. dev.	Min	Max	Mean	Std. dev.
Cu	mg/L	80	0.015	0.077	0.031	0.01	0.001	0.019	0.01	0.002	67.74	0
Cd	mg/L	80	0.017	0.046	0.014	0.007	0.00	0.00	0.00	0.00	100	0.1
Zn	mg/L	80	0.019	0.023	0.021	0.0005	0.005	0.013	0.009	0.001	57.14	0.5
Fe	mg/L	80	0.004	0.010	0.007	0.0007	0.001	0.003	0.002	0.0002	71.43	0.3
Pb	mg/L	80	7.99E − 05	0.003	0.0014	0.0003	0.00	0.00	0.00	0.00	100	0.1
As	mg/L	80	0.0019	0.005	0.0018	0.0008	0.00	0.00	0.00	0.00	100	0.1

Significance at 95% confidence level.