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Taxonomic and Functional Changes of Bacterial Communities in the Rhizosphere of Kimchi Cabbage After Seed Bacterization with Proteus vulgaris JBLS202
Dipto Bhattacharyya, Swarnalee Duta, Sang-Mi Yu, Sang Chul Jeong, Yong Hoon Lee 한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2018, 34권 4호 3 286-296 (11 pages)
the rhizosphere. An in- crease in the functional genes was responsible for increase in both soil respiration and nitrification efficiency in maize plants indicating that ecological functioning can be influ- enced by changes in microbial communities and network interactions (Wang et al., 2015). Taken together, the results of this study indicate that introduction of beneficial bacteria can play... spp. in the treated rhizosphere. To extend these findings, we used pyrosequencing to analyze the changes in bacterial communities in the rhizosphere of Kimchi cabbage after introduction of JBLS202. The alterations were also evaluated by taxon-specific realtime PCR (qPCR). The pyrosequencing data revealed an increase in total bacteria abundance, including specific groups such as Proteobacteria, Acidobacteria, and Actinobacteria, in the treated rhizosphere. Time-course qPCR analysis confirmed the... -
Characteristics and Fate of Stormwater Runoff Pollutants in Constructed Wetlands
Jawara Christian Alihan, Marla Maniquiz-Redillas, Jiyeon Choi, Precious Eureka Flores, Lee-Hyung Kim 한국습지학회 한국습지학회지 8 Pages
한국습지학회 한국습지학회지 2017, Vol.19 No.1 4 37-44 (8 pages)
engineered systems utilizing wetland vegetation, soils, and microbial activities to treat contaminants in surface water, groundwater or water streams (ITRC, 2003). These are designed to emphasize specific characteristics of wetland ecosystems for improved treatment capacity. Treatment of pollutants in constructed wetlands is based on the biological and physical processes including adsorptio... Nonpoint source (NPS) pollution continues to degrade the water quality. NPS pollutants signals high concerns against a sustainable environment. Low impact development (LID) is the leading management practice which regulates and treats stormwater runoff especially in highly impervious urban areas. Constructed wetlands are known to have efficient removal capability of NPS pollutants. Likewise, these LID facilities were intended to maintain the predeveloped hydrologic regime through series of... -
Oxygen Mass Balance Analysis in an Intermittently Aerated Wetland Receiving Stormwater from Livestock Farms
Heidi B. Guerra, Kisoo Park, Youngchul Kim 한국습지학회 한국습지학회지 11 Pages
한국습지학회 한국습지학회지 2016, Vol.18 No.4 18 488-498 (11 pages)
NH 4-N) and ammonium nitrogen (NH 4-N) (MacPhee 2009). The study of Jamieson et al. (2003) indicates that the continuous aeration has great potential to improve nitrification in constructed wetlands receiving agricultural wastewater. However, due to the various factors that can affect the amount of oxygen in wetlands and the variations of hydrologic and biochemical c onditions from site to... of algae. Consequently, algal respiration was also the major oxygen depletion element with nitrification and biodegradation estimated as 5.35% and 6.43% of the total oxygen consumption. This excessive portion of oxygen consumption by algae was associated to the highly turbid water caused by the resuspension of sediment particles in the aeration pond, which also affected the subsequent wetland. Moreover, an abundance of oxygen was estimated during the day indicating that oxygen produced by algal... -
Nitrogen Removal in Column Wetlands Packed with Synthetic Fiber Treating Piggery Stormwater
Jing Cheng, Youngchul Kim 한국습지학회 한국습지학회지 8 Pages
한국습지학회 한국습지학회지 2016, Vol.18 No.1 9 68-75 (8 pages)
of nitrification. The active nitrification is probably caused by three reasons. First, the fiber has a great specific surface area, which provided more growth sites for nitrifiers (Jurecska et al., 2013). Second, the amide group at the end Fig. 5. Removal efficiencies of NH4-N and TKN versus operational time. of atomic structure makes it negative that microorganism can attach onto the media... of polymer fiber, and the released organic matters were found to serve as carbon source for denitrification. In addition, with longer retention time and frequent recirculation, lower effluent concentration was observed. With higher pollutant loading rate, higher nitrification and denitrification rates were achieved. However, although organic matters were released from the fiber, the lack of carbon source was still the limiting factor for the system since the release persisted only for 40 days. -
다양한 하수를 대상으로 유기물 성상과 질산화 반응조 내 유기물 변화
임지열, 길경익 한국습지학회 한국습지학회지 7 Pages
한국습지학회 한국습지학회지 2015, Vol.17 No.4 12 421-427 (7 pages)
sludge, Water SA. 25(1), pp. 69-74. Ekama, G. A., Dold, P. L. and Maris, G. V. R. (1986) Procedures for determining influent COD fractions and the maximum specific growth rate of heterotrophs in activated sludge system, Wat. Sci. Tech., 18, pp. 91-114. Gil, K.I. (2006) Nitritation of anaerobic digester supernatant from sludge processing in MWTP, J. of Korean Society in Water Quality . 22(3),... ASM 모델에서는 유기물을 특성에 따라 분류하는데, 일반적인 COD와 BOD로의 분류로는 ASM에서 요구하는 조건 을 충족시키지 못한다. 본 연구에서는 하수종말처리장 수처리 및 슬러지 처리 계통 하수를 대상으로 미생물 호흡률을 기반으로 하여 ASM에서 요구하는 유기물 분류에 대한 실시하였다. 분석 결과 유기물 성상 분석 결과 각 하수마다 유 기물 구성에서 차이를 보이는 것으로 나타났다. 이는 각 공정의 하수를 처리할 때 반드시 파악해야 하는 중요한 하수 특성이라고 할 수 있다. 따라서 본 연구를 통해 규명한 각 하수별 유기물... -
Prospects of Activated Sludge Process in Japan - Its Past, Present, and Future -
Masanori Fujita 한국습지학회 한국습지학회지 7 Pages
한국습지학회 한국습지학회지 2007, Vol.9 No.1 6 61-67 (7 pages)
the system because the specific growth rate of the microbes were pretty small. It was also found that the theory of SRT control was very effective for nitrification. The activated sludge process had surely been evolving by efforts and enthusiasm by many researchers. More Expectation to Activated Sludge Process Extraction of weakness and modification Concept of sorption by activated sludge stated...