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RISS 인기검색어
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- 저자 : 양시천 ( Shi-chun Yang ) (검색결과 2 건)
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댐호화된 하천의 조류 과다 발생원인과 해소 방안 - 낙동강 물금 지역의 수질 분석 데이터를 중심으로 -
양시천,하첨첨,강태호,Yang, Shi-Chun,Xia, Tian-Tian,Kang, Tai-Ho 한국환경복원기술학회 2017 한국환경복원기술학회지 Vol.20 No.4
The purpose of this study is to analyze a term of decade of water quality data of the Mulgum intake station on the Nakdong river(dam) to find the cause of algal blooms and to set an alternative to prevent artificial lake water pollution. Our study shows that water quality changes have regular periodic regularity and there was a certain correlation between specific analytical items. According to the analysis results of each factor, the decline in precipitation was not the main reason for algal blooms. TP concentration had a slight effect on Chl-a concentration but was not a limiting nutrient of a bloom. TN concentration had a strong correlation with Chl-a and strongly negative correlation with temperature, but was not a bloom's limiting nutrient, and was only a dependent variable. As the temperature was negatively correlated with the Chl-a concentration, it is found that the aspect of the ecological influence of the temperature was the most important factor of the phytoplankton concentration change. The N/P ratio lies under a power function with a high degree of reliability by the TP concentration, and the phenomenon appeared to be the same as the results of two other comparative areas. This result confirms that TN is dependent on TP and the biota in the lake that TN is a dependent variable whose concentration is determined by TP it. In conclusion, the increase in lake bloom is the result of a food chain change, and it is necessary to control the ecosystem by the food chain in the lake in order to reduce the lake's bloom. In particular, it is important to keep the benthic ecosystem as wide as possible in the aerobic state.
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파일럿 규모의 선회식 가압부상공정에서 응집제 종류별 유해 조류 제거효율 비교
오홍석 ( Hong-sok Oh ),강선홍 ( Seon-hong Kang ),양시천 ( Shi-chun Yang ),남숙현 ( Sook-hyun Nam ),김은주 ( Eun-ju Kim ),황태문 ( Tae-mun Hwang ) 한국수처리학회(구 한국수처리기술연구회) 2018 한국수처리학회지 Vol.26 No.4
Dissolved air flotation (DAF), one of the most representative physico-chemical processing technologies used to remove suspended particles or algae in aquatic environment. Cyclonic Dissolved Air Flotation (DAF), a dissolved air flotation method displaying improved performance, has a structure capable of forming twirling flows that produce microbubbles that adhere to suspended matter and float to the surface of the water passing through the float separation tank. The purpose of this study is to evaluate the cyclonic-DAF process for the treatment of harmful algae in aquatic environment. The effect of coagulants type, such as PAC, PolyDADMAC and R-119, were investigated. In this experiments, algaecide named as R-119 showed the effective coagulant to remove chlorophyll-a and algae. For the effect of the coagulant dose, the removal efficiency of algae was increased as coagulant concentration increased. The optimal concentration coagulant has been similarly observed at 60 mg/L for PAC and R-119. However, PAC showed that it did not meet the number of cyanobacteria cells below the algae level suggested by the algae warning guideline. In the case of PolyDADMAC, the removal of cyanobacteria cells showed excellent results, but turbidity and suspended solids were significantly lower than that of PAC and R-119.
ScienceON
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