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- 저자 : 남세용 ( Se Yong Nam ) (검색결과 40 건)
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유가공 폐수의 활성슬러지 처리에서 벌킹 제어용 염소가 미생물의 유기물 분해 활성에 미치는 영향
남세용,최진택,Nam Se-Yong,Choi Jin-Taek 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.1
Chlorination inhibition on the organic removal activity of activated sludge microorganism was investigated in this study. It is well known that chlorination improves the settleability of filamentous bulking sludge through the selective impediment of filamentous microorganisms. However, it is based on the declination of effluent water quality after actual chlorination in dairy wastewater treatment plant. In case of the activated sludge which was exposed in the suggested concentration of chlorine $7.5\;mgCl_2/gVSS/day$ for the filamentous bulking control, decrease of organic uptake rate of $4.9\~24.0\%$, and dentrification rate of $24.8\~30.3\%$ ware shown in comparison to the control group which was not reacted with chlorine. As a result of comparing floc size of activated sludge microorganism, the average of floc diameter in the chlorine exposed group was $150\;{\mu}m$, which displays $25\%$ decrease compared with the control group.
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남세용(Se Yong Nam),김정호(Jeong Ho Kim),김상현(Sang Hyoun Kim) 大韓環境工學會 2012 대한환경공학회지 Vol.34 No.10
본 연구에서는 천연 무기소재로부터 합성된 무기개량제의 슬러지 탈수능 개선 효과를 상용 유기고분자응집제와 비교 평가하였다. 2.0 mg/g sludge TS의 주입량에서 무기개량제는 여과시간, 여과비저항계수, 탈수케이크 함수율, 탁도를 각각 146에서 41초로, 8.3×1014에서 2.4×1014m/kg로, 82.1에서 77.1%로, 112에서 61.1 NTU로 향상시켰으며, 이는 상용 양이온 유기고분자 응집제에 필적하는 성능이었다. 따라서 무기개량제를 하수슬러지의 대체 개량제로서 활용 가능할 것으로 판단된다. 각 탈수능 성능지표 간의 상호 관계를 분석한 결과, 여과시간, 여과비저항계수, 탈수케이크 함수율 간에 강한 상호관계가 확인되었다. This study aimed to investigate the effect of an inorganic conditioner composed of natural inorganic materials on the dewaterbility of sewage sludge and compare the performance with those of conventional organic polymeric conditioners. A dosage of 2.0mg inorganic conditioner/g sludge TS decreased time to filter test (TTF), specific resistance to filtration (SRF), water content of dewatered sludge cake, turbidity from 146 to 41 sec, from 8.3×1014 to 2.4×1014 m/kg, from 82.1 to 77.1%, from 112 to 61.1 NTU, respectively, which was compatible to the conventional cation organic polymer. An inorganic conditioner would be used in sewage sludge treatment as a suitable alternative conditioner. Regression analysis showed a strong relationship among TTF, SRF, and water content.
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김정호,남세용,Kim, Jeong-Ho,Nam, Se-Yong 해양환경안전학회 2014 해양환경안전학회지 Vol.20 No.5
In this study, physico-chemical properties and pollution degree of surface sediments collected at 5 stations(S1~S5) of Incheon H wharf in March 2014 were investigated. From particle size, surface area, XRD and XRF analyses, the sediment samples consisted of similar oxides and minerals. Considering total score of COD, AVS and IL, pollution level ranged between 2 and 3 based on domestic standards. In case of heavy metal contamination, Cd, Ni and Pb were classified as moderately polluted by USEPA standards. However, Cu, Zn and Cr were classified as heavily polluted. With geoaccumulation index value($I_{geo}$), Cd contamination was estimated as class 3. In addition, the calculated enrichment factors of Cd, Pb and Zn were exceeded a value of 1. Site S4 was high as 3.1 in total enrichment factor.
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무기개량제를 이용한 소화 및 농축슬러지의 개량 및 탈수 특성
김정호,남세용,Kim, Jeong-Ho,Nam, Se-Yong 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.6
Objectives: Wastewater treatment plants typically produce a large volume of waste sludge. In this study, the conditioning and dewatering properties of a digested and thickened sludge from an industrial wastewater treatment plant were investigated in order to improve the dewaterbility of the sludge. Methods: Jar-tests and Buchner funnel tests were carried out to assess the conditioning and dewatering properties of a waste sludge. TTF (Time to Filter Test) and SRF (Specific Resistance to Filtration) were adopted as the indices of sludge dewaterbility. Results: The valuation indices influencing the dewaterbility of the waste sludge, including TTF, SRF, water contents, VS/TS ratio and turbidity, were measured. The TTF and SRF of the digested and thickened sludge were decreased to 40 sec, $3.43{\times}10^{12}$ m/kg, and 39 sec, $1.09{\times}10^{12}$ m/kg, respectively. Conclusions: The conditioner composed of natural inorganic materials turned out to be effective in the reduction of sludge water contents.
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Fe(II)/Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub>을 이용한 하수슬러지 탈수능 개선
한준혁,남세용,Han, Jun-Hyuk,Nam, Se-Yong 유기성자원학회 2022 유기물자원화 Vol.30 No.3
Fe(II)/Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub>을 이용하여 하수슬러지의 탈수능 개선 여부를 확인하고자 약품 주입량에 따른 탈수능을 비교하였다. 탈수능의 주요 지표로 STTF, SCST, 함수율, TS, VS를 분석하였으며 TB-EPS as carbohydrate 및 protein을 측정하여 EPS의 파쇄여부를 확인하였다. 실험한 Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub> 농도 범위는 0.4~0.7 mmol.gVS였고, Fe(II)/Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub> 몰비 범위는 0.5~0.7 mol/mol이었다. 실험결과, Fe(II)/Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub>의 농도 및 몰비가 증가함에 따라 STTF는 초기 1.00에서 15.00까지 증가하였고, SCST는 1.00에서 4.51까지 증가하였다. 함수율은 82.6%까지 감소하였다. TB-EPS as carbohydrate 및 protein의 감소율은 각각 37.16% 및 57.34%까지 증가하였다. Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub> 0.6 mmol/gVS, Fe(II)/Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub> 0.6 mol/mol 조건에서 STTF, SCST 및 함수율은 각각 13.64, 4.19 및 83.1%로 주입량 대비 탈수능 개선효과가 높게 나타났다. 이는 Fe(II)에 의해 생성된 SO<sub>4</sub><sup>-</sup> 라디칼이 EPS를 파쇄하여 EPS와의 결합된 수분과 세포수를 수용액으로 용출시켜 탈수능이 개선된 것으로 사료된다.
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최진택,남세용,Choi, Jin-Taek,Nam, Se-Yong 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.4
Chlorine inhibition on the denitrifing activity of activated sludge treating dairy wastewater was investigated in this study. Filamentous bulking was caused artificially by a sudden load of feed and monitored by measuring sludge volume index. In cases of the activated sludge and bulking sludge which were contacted with chlorine as $7.5\;mgCl_2/gVSS/day$ for bulking control, the decreases of specific denitrification of $32.2{\sim}40.4%\;and\;43.5{\sim}46.5%$ were shown in comparison to the control group which was not reacted with chlorine, respectively. In continuous operation, it was observed that the removal efficiency of total nitrogen was more susceptible to chlorine than the removal efficiency of total phosphorus.
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해양퇴적물 인 용출에 미치는 pH, 온도, 용존 산소 농도의 영향
천효창(Hyo-Chang Cheon),남세용(Se-Yong Nam),김상현(Sang-Hyoun Kim) 한국항해항만학회 2012 한국항해항만학회지 Vol.36 No.6
오염 원인 물질의 해양 내 거동에 대한 파악은 환경 변화에 따른 부영양화 등 해양 수질 오염에 대한 예측 및 대응 방안 선정 을 위한 전제 조건이다. 본 연구에서는 부영양화 원인 물질인 인의 해양퇴적물에서 해수로의 용출 특성을 조사하였다. 검토된 환경 조건은 pH7-9, 온도 10-20℃, 용존 산소 농도(dissolved oxygen, DO) 0.7-7.0 mg/L 였다. 생물학적 요인을 배제한 조건에서 회분식 실험을 통해 구해진인 용출 자료는 1차 반응식으로 해석되었으며, 환경 조건의 영향은 통계학적 방법을 통해 정량화 되었다. 해양 퇴적물로부터 해수로의 인 용출은 pH와 온도가 높고 DO가 낮을수록 증가하였다. 1차 반응 평형 농도 기준으로 검토된 범위의 pH 증가, 온도 증가, DO 감소는 각각 인용출을 2-3배 증가시켰다. Understanding the behavior of pollutants in the marine environment is essential for coping with the marine pollution problems such as eutrophication. In this study, the effects of environmental parameters on phosphorus release from marine sediment to sea water were investigated. The environmental parameters such as pH in the range of 7 to 9, temperature from 10 to 20C and dissolved oxygen levels (DO) renging 0.7 to 7.0mg/L were examined. Phosphorus release data were taken from batch tests excluding biotic effects, and analyzed using a first-order kinetic model. The effects of environmental parameters were quantified using a statistical methodology. High pH, high temperature, and low DO increased phosphorus release from the sediment to sea water. pH from 7 to 9, temperature from 10 to 20 ℃, or DO from 7.0 to 0.7 mg/L magnified the equilibrium phosphorus concentration up to 2 ~3 times.
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