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 1

Summary Analysis of Faecal Sludge Characteristics (Number of samples = 6,000 trucks).

parameter	unit	Public				Private				Composite
		Mean	SD	Min	Max	Mean	SD	Min	Max	Mean	SD	Min	Max
COD	mg/L	25407	8637	8394	48000	8361	5944	800	24000	13906	9728	800	32000
BOD5	mg/L	4313	210.1	4100	4520	3993	90.18	3900	4080	2878.33	1946	500	5280
BOD10	mg/L	5256.8	202.8	4978	6750	4085.7	98.5	3915	4236	3125	986.9	687	5350
BOD15	mg/L	5485.1	137.5	5096	6936	4123.3	76.9	3985	4536	3215	895.7	721	6020
BOD20	mg/L	5497.6	120.8	5128	7012	4185.6	66.5	4082	4623	3295	798.5	785	6095
TSS	mg/L	20367	12333	8400	55800	7850	7742	800	25200	16445	16424	500	54800
TVS	mg/L	84.92	2.65	81.50	87.99	73.46	11.61	54.5	83.85	81.78	5.799	70	89
pH		7.58	0.20	7.33	7.91	7.66	0.16	7.47	7.96	7.43	0.25	6.72	7.98
EC	µs/cm	10977	2917	7590	14530	5340	1143	3487	6884	7062.77	2497.64	253	13050
TDS	mg/L	5552	1312	3795	7268	2587	799.8	1090	3448	3580	993.80	246	5039
Turbidity	NTU	13523.60	4663.20	782	19890	4369.12	2508.91	1897	12867	14921	14117	735	56000
DO	mg/L	0.80	0.9	0	2.29	0.76	1.28	0.00	3.27	0.85	1.22	0	5.47
Salinity		6.62	2.39	4.19	11.06	2.86	0.63	1.83	3.37	3.99	0.90	2	5.66
Temp	°C	25.30	3.45	18.90	29.11	26.55	2.68	22	30.07	24.53	2.93	18	28.75
DOM	mg/L	5000	59.8	3000	7600	2900	59.8	1950	4200	2500	352	3400	5600
TOC	%	8520	298	4150	8530	3500	195.6	2200	4530	3500	216	3150	6840
COD:BOD5		5.89	41.11	2.05	0.88	2.09	65.91	0.21	5.88	4.83	5.00	1.6	6.06
TVS: TSS ( E^−3)		4.2	0.21	9.70	1.58	9.36	3.35	14.10	3.33	4.97	0.35	140	1.62
Settleable	ml/L	221.1	84.18	100	300	81.88	15.59	60	100	184.2	77.66	80	250