Table 3: Experimental removal rates and removal efficiencies.

Packing height CmNumber of period Air flow rate L/hAverage DO mg/LCOD removal rate
kg COD/m3⋅d
TN removal rate
kg N/m3⋅d
COD removal efficiency%-N removal efficiency% removal efficiency%

Phase I
27 Cm
11205.561,162.22.2
21204.32,710,01594,695.17.7
3600.52,680,1893,597.792.8
4600.593,460,22896,699.196.3
51201.623,510,1397,999.655.02
61201.664,220,189899.7662.1
7600.364,240,2898,698.496.6
8600.287,040,31598,266.865.5
91201.77,050,32298,368.567

Phase II
54 Cm
101804.174,230,23598,284.281.1
11600.864,20,27997,599.596.3
12600.118,040,4198,376.475.2
131200.188,060,40198,675.473.6
141801.238,080,37498,871.468.6
151802.145,660,21898,759.256.4
16600.66–0.15,640,19298,35649.6
171200.165,650,30498,582.978.6
18600.395,650,36598,496.894.2

Phase III
0 Cm
19600.735,63098,297Continuous
decrease
201204.085,6097,699.6Continuous
decrease