| Title |
Pretreatment of Raw Water Using The Fixed - bed and Fludized - bed Bio - filter Processes (2) |
| Authors |
정팔진 ; 이영동 ; 곽동희 ( Paul Gene Chung ; Young Dong Lee ; Dong Heui Kwak ) |
| Abstract |
The biological treatment method for slightly polluted raw water was studied by using both a fixed-bed biofilter packed with filamentous media and a fluidized-bed biofilter packed with spongy media. The characteristic of this biofilter was able to be expressed as Se= So· e^( 0.0863◎), which was proposed as a kinetic model for thrickling filter by Eckenfelder. With the object to overcome a problem, the decrease of nitrification efficiency in the conventional biological treatment at low water temperature, a small-scale reactor with nitrifying bacteria immobilized in synthetic PEG beads was applied. The efficiency of the reactor for the nitrification of NH₃-N was found to be worse at wormer water temperature(2l℃, 24℃), but better at low water temperature(6℃, 12℃) than that of the conventional biofilter. In addition, it was confirmed that the process used in this study can be safe from intestinal pathogenic microorganisms and others, if all operation conditions for the conventional processes are satisfied. |