Table 2.

The performance of ABR in treating combined industrial effluents.

Parameters	Influent/raw wastewater					ABR effluent					% removal
	20%	40%	60%	80%	Original WW	20%	40%	60%	80%	Original WW	20%	40%	60%	80%	Original WW
pH	8.1	8.48	8.6	8.76	10.2	7.89	8.31	8.52	8.66	8.41	—	—	—	—	—
Conductivity (μs)	627	646	645	676	702	654	616	645	687	702	—	—	—	—	—
TDS	378	330	344	394	411	339	324	334	357	365	10	2	3	9	11
VS	712	812	780	1333	1400	83	85	93	215	115	88	89.5	88	83.8	91.7
TS	600	520	1050	1160	1960	45	86.3	163.9	97.2	305	92	83.5	86	90	84
COD	70	189	284	379	474	42	54	121	159	297	40	47.8	57.3	58.04	37.34
BOD	23.3	25.4	50.9	77	84.8	18.5	4.16	5.1	10.2	18.5	82	80	80	81	78
Nitrates	24	59	83	98	145	1.8	6.1	9.23	8.9	16	92.5	89.6	88.8	90.9	88.9
Ammonia	17	23	45	57	82	2.1	2.1	4.5	8	10	87.6	90.8	90	85.9	87.8
Lead	0.131	0.653	1.335	1.851	2.337	0.558	0.653	1.222	2.109	2.703	64	27.8	8.46	7.4	2.7
Nickle	.117	.225	.315	.271	.403	0.079	0.015	0.035	0.074	1.014	92.1	93.4	87	79	79
Cadmium	.026	.026	.021	.009	.048	0.009	0.009	0.007	0.001	0.007	65.4	65.4	66.7	88.9	85.4