Table 3.

TPH removal efficiency during composting period

Time (week)	The residual TPH (mg.kg−1)
	1:5 ratio	1:8 ratio	1:10 ratio	1:15 ratio	1:20 ratio	1:30 ratio	1:40 ratio	1:50 ratio	1:75 ratio	1:100 ratio
Adjustment period	104.22	65.14	52.11	34.74	26.06	17.37	13.03	10.42	6.95	5.21
0	85.41	54.64	44.97	30.72	22.94	15.44	11.86	9.24	6.42	4.69
2	62.37	39.87	40.87	23.16	16.82	11.83	9.90	8.60	5.98	3.90
3	31.38	21.25	20.17	25.56	12.97	9.12	7.32	5.93	4.30	2.98
4	29.01	21.16	21.29	15.81	12.49	9.19	7.10	5.89	4.06	3.01
5	26.65	17.91	17.34	13.37	10.93	7.78	6.20	5.15	3.63	2.63
6	26.59	17.70	18.19	13.81	11.23	7.84	6.34	5.07	3.64	2.68
7	24.11	15.97	16.73	12.70	10.33	7.58	5.83	4.68	3.25	2.41
8	24.29	15.89	16.52	12.80	10.33	7.67	5.79	4.61	3.32	2.41
9	24.35	15.89	16.69	12.83	10.20	7.58	5.74	4.58	3.27	2.38
10	20.29	15.93	16.49	12.80	10.20	7.53	5.76	4.61	3.26	2.41