Investigation of Heavy Metal Effects on the Anaerobic Co-Digestion Process of Waste Activated Sludge and Septic Tank Sludge

Table 2

TS and VS removal performance during digestion (%).

Day	TS	VS	TS	VS	TS	VS	TS	VS	TS	VS
	SBS		ECS1		ECS2		ECS3		ECS4
5	31.22	18.80	4.55	8.73	3.74	5.12	0.81	2.54	0.65	1.46
10	24.88	34.90	12.85	16.38	9.92	13.86	4.55	12.28	3.25	6.59
15	30.73	39.69	21.14	17.43	11.71	16.94	6.83	14.17	4.07	7.79
20	34.63	41.99	27.48	18.62	11.87	19.03	21.30	15.13	4.72	9.01
	SBS		EZS1		EZS2		EZS3		EZS4
5	31.22	18.80	3.58	3.89	2.28	3.69	4.39	5.93	3.25	2.13
10	24.88	34.90	16.10	14.41	14.80	12.62	10.08	16.49	7.32	9.41
15	30.73	39.69	22.28	15.37	21.63	15.25	19.84	17.69	10.08	13.03
20	34.63	41.99	24.07	16.45	25.85	17.48	24.23	20.04	11.71	13.87
	SBS		ERS1		ERS2		ERS3		ERS4
5	31.22	18.80	11.71	13.82	6.18	9.01	3.25	5.99	2.44	4.43
10	24.88	34.90	14.31	14.31	12.85	9.62	10.24	6.63	5.69	5.41
15	30.73	39.69	20.81	14.71	20.16	10.97	13.50	9.42	8.13	5.45
20	34.63	41.99	29.43	16.23	23.41	13.36	21.63	12.62	15.28	6.60
	SBS		EPS1		EPS2		EPS3		EPS4
5	31.22	18.80	7.15	10.43	6.99	15.55	8.29	11.38	1.46	10.66
10	24.88	34.90	12.52	13.03	18.05	16.50	12.68	13.36	3.41	12.62
15	30.73	39.69	24.88	15.43	28.13	17.69	19.67	14.18	7.80	13.82
20	34.63	41.99	28.94	16.36	29.27	20.05	27.80	15.14	16.10	17.66