Journal of Wetlands Research (한국습지학회지)
- Volume 1 Issue 1
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- Pages.7-16
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- 1999
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- 1229-6031(pISSN)
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- 2384-0056(eISSN)
Pilot Test of Biofilter and Vegetation Bed for Contaminated Ditch Treatment at Summer
하절기 오염 소하천 정화를 위한 생물여과조와 식생대의 Pilot Test
- Lee, Sang-Hwa (Seo-Bong Recycling) ;
- Cho, Moon-Chul (Seo-Bong Recycling) ;
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Park, Young-Seek
(Seo-Bong Recycling) ;
- Moon, Jung-Hyun (Seo-Bong Recycling) ;
- Kim, Jwa-Kwan (Dept. of Environ. Eng., Jisan College)
- Published : 1999.12.30
Abstract
The objective of this study is to recover the contaminated ditch by using a biofilter filled up with waste-concrete media and vegetation bed. Two systems were tested for elimination of organic compounds, turbidity, nitrogen and phosphate. System 1 is three-stage system which consisted of one biofilter and two vegetation bed, system 2 has three-stage system consisted of one biofilter, one vegetation bed (four bed), and one media trench operated in series. In system 1, HRT of biofilter was 4 hour, and Oenanthe javanica was planted in two vegetation bed. In system 2, HRT of biofilter was varied 2 hours and Persicaria chinensis was planted on the top of the biofilter. And Oenanthe javanica, Hydrocharis asiatica, Salvinia natans were planted in four bed of a vegetation bed and the second vegetation bed of system 1 was rebuilt to a media trench bed. The elimination rate of BOD and turbidity was over 90% in both systems. The mean elimination rates 40~50%(system 1), 30~40%(system 2) for T-N and 40~50% (system 1), 30~40%(system 2)for T-P. T-N and T-P elimination performance of system 1 was a little higher(10%) than that of system 2. Results showed that vegetation bed are not efficient in reducing T-N and T-P. It was considered that HRT of vegetation bed of both systems was much lower(1~2hr) than that of conventional system(5~20days).