| Title |
Effect of Ozone Oxidation on Biodegradability of Dissolved Organic Compounds in the Landfill Leachate |
| Authors |
정승현 ( Seung Hyun Jeong ) ; 정병곤 ( Byung Gon Jeong ) |
| Keywords |
Biodegradability; Leachate; Ozone oxidation; DOC |
| Abstract |
The effect of ozone oxidation on biodegradability of leachate was studied. Ozone oxidation process was used as pre-treatment process to enhance performance of biological process in treating landfill leachate. Optimum ozone dosing rate and contact time in this experiment was 160 mg O₃/L hr and 45 minutes, respectively. Biodegradability was enhanced 5.08% by ozone oxidation. The ratio of ozone demand/DOC concentration was 0.049~0.091 mg O₃/mg DOC. The increase of biodegradability depending on ozone dosing rate(D) and contact time(T) can be expressed as follows ; ΔE=0.00479?D^(0.773)?T^(0.800) The biodegradation rate of DOC was increased proportionally with the increase of ozone dosing rate and contact time irrespective of landfill site age. The increase of biodegradability by ozone addition was not satisfactory. It is hard to expect significant increase in biodegradability by ozone treatment only. Thus, it is evaluated that ozone oxidation can not increase biodegradability significantly in concentrated wastewater composed of complex organic compound such as leachate. |