도시쓰레기 매립장 침출수 중의 COD 제거에 관한 연구 (A Study on COD Substance Removal of Landfill Leachate in Municipal Refuse)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 25권 / 4호 / 320 ~ 330페이지
· 저자명 : 이성호

초록

Analyzing the water qualities of sanitary landfill site in Taegu, this study was conducted to investigate the optimum treatment condition with fenton oxidation, ozone oxidation process called advanced oxidation process, especially for overcoming the limits of treatment ways of leachate contained nonbiodegradable substances, and satisfaction of legal regulation by COD removal efficiency when treated by a multi-process with GAC adsorption as a post-treatment. It is found that raw leachate contained with BOD5 of 3,148 mg/l, CODCr of 11,336 mg/l, CODMn of 2,276 mg/l and the ratio of BOD5/CODCr of 0.25 and alkalinity of 10,478 mg/l was so high that the experiment must be done after removing them. Landfill leachate was pre-treated through a process of aeration, sand filtration and dilution with distilled water. This pre-treated leachate was used for fenton oxidation and ozone oxidation treatment and then activated carbon adsorption process was performed following. In fenton oxidation for leachate optimum Fe2+/H2O2 dosage was 0.055 M/0.058 M and CODCr removal was gradually decreased according to Fe2+/H2O2 dosage was increased. The optimum condition for treatment was at pH value of 4, react time of 20 minutes and react temperature of 20oC and CODCr removal efficiency was 49% in this condition. On the other hand, CODCr removal efficiency of ozone oxidation was 51% at pH value of 10 and react time of 20 minutes. In multi-process treatment ozone oxidation after fenton oxidation with CODCr removal of 73% has a better result than inverse process and when added GAC adsorption, it removed organic substance of 87% and 89% in CODCr and CODMn.

영어초록

Analyzing the water qualities of sanitary landfill site in Taegu, this study was conducted to investigate the optimum treatment condition with fenton oxidation, ozone oxidation process called advanced oxidation process, especially for overcoming the limits of treatment ways of leachate contained nonbiodegradable substances, and satisfaction of legal regulation by COD removal efficiency when treated by a multi-process with GAC adsorption as a post-treatment. It is found that raw leachate contained with BOD5 of 3,148 mg/l, CODCr of 11,336 mg/l, CODMn of 2,276 mg/l and the ratio of BOD5/CODCr of 0.25 and alkalinity of 10,478 mg/l was so high that the experiment must be done after removing them. Landfill leachate was pre-treated through a process of aeration, sand filtration and dilution with distilled water. This pre-treated leachate was used for fenton oxidation and ozone oxidation treatment and then activated carbon adsorption process was performed following. In fenton oxidation for leachate optimum Fe2+/H2O2 dosage was 0.055 M/0.058 M and CODCr removal was gradually decreased according to Fe2+/H2O2 dosage was increased. The optimum condition for treatment was at pH value of 4, react time of 20 minutes and react temperature of 20oC and CODCr removal efficiency was 49% in this condition. On the other hand, CODCr removal efficiency of ozone oxidation was 51% at pH value of 10 and react time of 20 minutes. In multi-process treatment ozone oxidation after fenton oxidation with CODCr removal of 73% has a better result than inverse process and when added GAC adsorption, it removed organic substance of 87% and 89% in CODCr and CODMn.

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