Environmental Systems Research

Table 7 Comparison of scoria and pumice filter media efficiency in tannery wastewater treatment

From: Identification of two low-cost and locally available filter media (pumice and scoria) for removal of hazardous pollutants from tannery wastewater

Parameters	% removal at RT = 24 h		% removal at RT = 48 h		% removal at RT = 72 h
Parameters	Pumice	Scoria	Pumice	Scoria	Pumice	Scoria
BOD₅	56	52	57	55	62	59
COD	27	48	30	50	45	54
TSS	65	75	68	83	70	84
NH₄–N	41	32	28	27	23	6
NO₂–N	88	98	95	98	97	97
NO₃–N	40	51	56	80	95	99
PO₄–P	41	57	51	60	66	63
Sulfide	70	73	71	75	72	77
Sulfate	84	77	83	76	83	75
Total chromium	76	71	76	71	70	69
Average	58.8	63.4	61.5	67.5	68.3	68.3

Back to article page