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KMID : 0382419990250040143
Korean Journal of Environmental Health Society
1999 Volume.25 No. 4 p.143 ~ p.149
A Study on Treatment of Milk Wastewater Using on Fluidized-bed Bio-reactor





Abstract
This study was carried to investigate the milk-wastewater treatment in batch and continuous fluidized-bed bioreactor containing active microorganism, Aspergillus niger KCTC 1231. The reactor was operated at 30¡É. The COD removal efficiency and MLSS were measured to determine the performance of the fluidized-bed bioreactor by cell concentration, aeration rate, and organic loading rate, respectively. At conditions of 60 §¢ cell concentration and 2.0LPM aeration rate, milk-wastewater showed the COD removal efficiency of 81.51% and MLSS of 43,562 mg/§¤, Also the same conditions, at adding 80 §¢ chitosan beads, the COD removal efficiency and MLSS were about 85.79% and 62,482.5 mg/§¤, respectively. In case of organic loading rate 3.88 kgCOD/§©¡¤day, free cell and adding chitosan beads showed about 80¡­85% and 85¡­90% COD removal efficiency, respectively. It was showed that milk-wastewater treatment of fluidized-bed bioreactor with chitosan beads was about 5% more efficient.
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