Removal of Organic Matters and Nutrients by Using Bio-balls …
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Table 1 Characteristics of synthetic wastewater
Batches
COD in mg/l
Nitrate in mg/l
Phosphate in mg/l
1
100
15
5
2
200
20
10
3
400
25
15
4
800
30
20
5
1000
35
25
2.3 Operating Procedure of MBBR
For the study, MBBR was run under continuous flow system. Model setup of MBBR
was shown below in Fig. 3a, b. The filling ratio of media was kept 50% of the volume
of the tank, and for agitation of media, air diffuser was used which supply oxygen to
synthetic wastewater for the survival of bacteria. Experiments were performed under
aerobic condition in five batches for both the media individually which includes both
nitrification and denitrification process. Reactor was continuously operated for 24 h,
and sample was collected in every two hours interval, i.e., 2, 4, 6, and 8 h, and the
end of 24 h. After collection of each sample, experiments of TDS, pH, COD, nitrate,
and phosphate were performed to determine the final concentration and to calculate
the percentage removal.
Fig. 3 MBBR setup