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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국습지학회 한국습지학회지 한국습지학회지 제3권 제1호
발행연도
2001.1
수록면
75 - 89 (15page)

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Constructed wetlands were typically cost less to buiId and operate, and require less energy than standard mechanical treatment technology but they have similar performance to centralized wastewater treatment plants. Therefore, they were constructed especially many in rural areas, where are small villages but not industries. Accordingly, plantless column tests were performed to investigate the possibility on using zeolite as a filter medium of constructed wetland for the wastewater treatment. CODcr removal efficiency was 94.63% at hydraulic load 314L/㎡·d and filtering hight 100cm filled with a zeolite mixture. This zeolite mixture consisted of 1:1 by volume of a zeolite in the diameter range of 0.5 to 1 mm to a zeolite in the diameter range of 1 to 3mm. According, hydraulic load 314Um" d was considered as optimal. Three zeolite mixture were used to determine the optimal mixing ratio by volume of a zeolite(A) in the diameter range of 0.5 to 1mm to a zeolite(B) in the diameter range of 1 to 3mm diameter. 1:3, 1:1 and only B in A to B by volume were tested at hydraulic load 314L/㎡·d and filtering hight 100cm. CODcr removal efficiency was more than 89% at mixing ratios of 1:3 and 1:1 in A to B. Removal efficiency was lower at the column filled with only B. Removal efficiency was better at filter medium filled with mixing ratio 1:1 in A to B than with the other mixing ratios. Thus, it was found that the mixture of mixing ratio 1:1 in A to B was appropriate for filter medium of constructed wetland. Removal efficiency was higher in down-flow than in up-flow, and CODcr, and BOD were removed best in 20cm filter height near feeding area.

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