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DOI : 10.17640/KSWST.2015.23.1.83 , Vol.23, No.1, 83 ~ 96, 2015
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| Title |
| Study on Water Quality Purification of Subsurface-Flow Wetland using Biological Aerated Filtration |
| 이준헌 Joon Heon Lee , 최형주 Hyung Joo Choi , 최동호 Dong Ho Choi , 서대석 Dae Seuk Seo , 박준석 Jun Seok Park , 오종민 Jong Min Oh |
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| Abstract |
| For the water quality improvement study of the high-concentration polluted stream water and the non-point pollution source, we have tried to check the removal efficiency of the particulate, the organic material and the nutrient salts according to the EBCT (Empty Bed Contact Time) using the lab-scale biological aerated filter wetland reactor. In the case of the operation of the EBCT 24, 18 and 12hr, the SS removal efficiency has shown more than about 75% regardless of the EBCT. The organic material (CODCr, BOD5) and the phosphate removal efficiencies have shown more than about 75% and 92%, they have measured the lowest at the state of 12hr. On the other hand, the organic material treatment efficiency has shown more than 70% in the EBCT 12hr, so this reactor is supposed to make not only influent concentration but also influent volume stable. From the standard of the removal volume per time in conformity with the retention time inside reactor, the 90% of the total organic material and phosphate removal volume have shown to operate in the 12hr retention time. In the result of the microorganism volume measurement of each reactor modules, the influent part has shown to have more than 1.7~2.3 times because the influent part has more organic material concentration than the effluent part. The microorganism SOUR value in the reactor has increased as much as about 5~20% as the EBCT has increased, the value at the influent part has increased more than at the effluent part up to about 50%. In this study, it has shown to be possible to remove as much as about 80% of the particulate, the organic material and the phosphate through the subsurface-flow wetland using the biological aerated filter technique. Therefore, it has been evaluated that the biological aerated filter reactor would be very effective as the purification device for the polluted stream water and the non-point pollution source. |
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| Key Words |
| Biological Aerated Filter, Subsurface-Flow Wetland, Empty Bed Contact Time, Non-point source, Biofilm |
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