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Table 2 Effects of changes in temperature, retention time and H ₂ O ₂ volume on the COD and BOD removal efficiency (%) in WPO process

From: The study of leachate treatment by using three advanced oxidation process based wet air oxidation

Parameter	H₂O₂ volumes	1 mL			2.5 mL			5 mL
	Temperature time	100°C	200°C	300°C	100°C	200°C	300°C	100°C	200°C	300°C
COD	30 min	4.66	4.5	16	15	21.7	19.5	20.6	10.8	21.3
	60 min	6.6	27.5	24.8	23.6	32.8	26	29	33.7	30
	90 min	12	42	34	31.5	44	36.3	32	34	39.4
BOD	30 min	39	32.5	20.7	25.7	10.4	39	24	31.5	32
	60 min	35.7	26.3	39.7	29.9	21.5	40.5	37	35	36.8
	90 min	30	34	45	36.5	32	44	40	42	50
NH₃	30 min	68.1	54.5	54	53.5	56	56	58	35	34
	60 min	57.5	57	69	48.5	64	61	65.5	28	28
	90 min	29	58	41	49	65	56	79.5	25	25

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