Study of Carbonaceous and Nitrogenous Pollutant Removal Efficiencies in a Hybrid Membrane Bioreactor

Table 3

Experimental removal rates and removal efficiencies.

Packing height Cm	Number of period	Air flow rate L/h	Average DO mg/L	COD removal rate; kg COD/m^3⋅d	TN removal rate; kg N/m^3⋅d	COD removal efficiency%	-N removal efficiency%	removal efficiency%
Phase I; 27 Cm	1	120	5.5	—	—	61,1	62.2	2.2
	2	120	4.3	2,71	0,015	94,6	95.1	7.7
	3	60	0.5	2,68	0,18	93,5	97.7	92.8
	4	60	0.59	3,46	0,228	96,6	99.1	96.3
	5	120	1.62	3,51	0,13	97,9	99.6	55.02
	6	120	1.66	4,22	0,18	98	99.76	62.1
	7	60	0.36	4,24	0,28	98,6	98.4	96.6
	8	60	0.28	7,04	0,315	98,2	66.8	65.5
	9	120	1.7	7,05	0,322	98,3	68.5	67
Phase II; 54 Cm	10	180	4.17	4,23	0,235	98,2	84.2	81.1
	11	60	0.86	4,2	0,279	97,5	99.5	96.3
	12	60	0.11	8,04	0,41	98,3	76.4	75.2
	13	120	0.18	8,06	0,401	98,6	75.4	73.6
	14	180	1.23	8,08	0,374	98,8	71.4	68.6
	15	180	2.14	5,66	0,218	98,7	59.2	56.4
	16	60	0.66–0.1	5,64	0,192	98,3	56	49.6
	17	120	0.16	5,65	0,304	98,5	82.9	78.6
	18	60	0.39	5,65	0,365	98,4	96.8	94.2
Phase III; 0 Cm	19	60	0.73	5,63	0	98,2	97	Continuous; decrease
	20	120	4.08	5,6	0	97,6	99.6	Continuous; decrease