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반응표면분석법을 이용한 뱀장어 양식장에서의 최적 응집제 주입조건

Optimization of Coagulant Dosage in Eel Farms Using Response Surface Methodology

이병헌 ( Byung Hun Lee ) , 박수빈 ( Su Bin Park ) , 김민경 ( Min Gyeong Kim )
  • : 한국수처리학회(구 한국수처리기술연구회)
  • : 한국수처리학회지 24권4호
  • : 연속간행물
  • : 2016년 08월
  • : 119-129(11pages)

DOI

http://dx.doi.org/10.17640/KSWST.2016.24.4.119


목차

1. 서 론
2. 연구방법
3. 결과 및 고찰
4. 결 론
사 사
References

키워드 보기


초록 보기

The objective of this research was to determine the optimum conditions for the eel farms recirculating water treatment using coagulation process. Response surface methodology (RSM) is used to get a set of designed experiments to obtain optimal multi factor operating conditions for the coagulation process. Response Surface Methodology explores the relationships between several explanatory variables and one or more response variables. It is a collection of mathematical and statistical techniques for empirical model building. The main objective is to optimize a response(Turbidity and UV254) which is influenced by independent variables PAC dosage and operating pH. PAC dosage were 1-25 mg/L and operating pH were 2-8, respectively. Rapid stirring(250 rpm, 1 min), slow agitation(30 rpm, 30 min) were experimenting with the conditions of precipitation(30min). COD, TN, Turbidity, UV254 was measured. Experimental results removal efficiencies of COD, TN, Turbidity, UV254 were up to 67 %, 87 %, 75 %, and 33 %, respectively. The independent variable to obtain Turbidity removal rate 65 %, COD removal rate 65 % and TN removal rate 86 % together were predicted pH 6.7 and 13 mgPAC/L.

ECN

I410-ECN-0102-2017-530-000563962


UCI

I410-ECN-0102-2017-530-000563962

간행물정보

  • : 공학분야  > 환경공학
  • : KCI 등재
  • : -
  • : 격월
  • : 1225-7192
  • : 2289-0076
  • : 학술지
  • : 연속간행물
  • : 1993-2017
  • : 1176


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1Fe 피복 vermiculite를 이용한 수용액상에서 Cr(VI)의 제거

저자 : 구본운 ( Bon Wun Gu ) , 박성직 ( Seong Jik Park )

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 3-13 (11 pages)

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We synthesized Fe-coated vermiculite (Fe-CV) for the removal of Cr(VI) and investigated the mechanism of Cr(VI) adsorption onto Fe-CV. Fe-CV was synthesized at different Fe molar concentration to vermiculite ratio, i.e., 1, 2, 5, 8, 10 mol-Fe/kg. Fe-CV synthesized at 8 mol-Fe/kg was found to be most effective for the removal of Cr(VI) and further experiments were performed under batch condition using the Fe-CV. Kinetic sorption test and model analysis showed that observed data were well suited to pseudo second-order model, indicating that chemisorption dominates the process of Cr(VI) adsorption to Fe-CV. Equilibrium test demonstrated that Freundlich model well describes Cr(VI) adsorption to Fe-CV and the maximum Cr(VI) adsorption capacity of Fe-CV was 6.86 mg/g. Cr(VI) removal was the highest at pH 2 and decreased with increasing pH due to electrostatic repulsion between Cr(VI) and Fe-CV at higher pH. The effect of competing anions on Cr(VI) adsorption follows the order: PO43->Co32->So42->NO3-. The removal percentage of Cr(VI) was increased but the adsorbed amount of Cr(VI) per unit mass of Fe-CV was decreased as the increase of the dosage amount of Fe-CV. Finally, Fe-CV is an effective adsorbent for the removal of Cr(VI) and the results of this study are helpful for understanding the mechanism of Cr(VI) removal by Fe-CV.

2하수처리장 잉여슬러지를 이용한 초기우수 및 월류수 내의 부유고형물과 유기영양염류 제거 효율에 관한 연구

저자 : 여인설 ( Inseol Yeo ) , 조은영 ( Eunyoung Jo ) , 박승민 ( Seungmin Park ) , 강광남 ( Gangnam

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 15-20 (6 pages)

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In this study, it was conducted precedent studies to select the optimal operating conditions of the integrated high-efficiency lamella typed flocculent settler using the excess sludge in order to effectively cope with the pollution caused by the initial rainfall and overflow. All experiments were performed in lab scale jar test with sampling water, coagulant and excess sludge. Coagulant was selected the poly aluminum chloride (PAC, 17%) and its injection amounts were 5, 10, 15 and 20 ppm. Dosages of excess sludge were 5, 10, 15 and 20 g/L. After proceeding jar test, it was confirmed removal tendency of COD, SS, T-P, PO₄-P and T-N. In the results, when the amount of PAC injection was increased without excess sludge, removal rate of COD, SS, T-P and PO4-P gradually had increased except T-N. In case of removal tendency depended on dosage of excess sludge, removal rate of COD was more effective with 5 and 10 g/L dosage than 0 g/L but concentration of COD was increased when sludge dosage was above 15 g/L. Even though SS was effectively removed with excess sludge, it was slightly decreased when excess sludge's dosage was increased. In case of T-P and PO₄-P, the more amount of excess sludge injected, the more they could remove. However, T-N was not made any removal by the flocculation with coagulant and excess sludge. Thus, based on the results, it is considered optimal operating conditions when 20 ppm PAC injected with 5 g/L excess sludge.

3수공구조물의 방류시스템 설계를 위한 수리실험 적용

저자 : 이경기 ( Gyeong Kee Lee ) , 최윤영 ( Yun Young Choi ) , 최정우 ( Jeong Woo Choi )

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 21-33 (13 pages)

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For the hydraulic model experiment, hydraulic properties of the existing spillway were reviewed to derive the optimal design solution in the auxiliary spillway to be constructed newly and hydraulic experiments were conducted by dividing the said model experiment into the experiment 1 and the experiment 2. The results for the experiment 1 as a design scheme found that the discharge capacity was fairly good. In addition, in the approach channel, the approach velocity was observed to be within the tolerance; however, it was revealed that it is necessary to make a supplement by changing the shape of the training wall as an eddy current was generated by the training wall. In the spill water, the pressure of the generating portion was analyzed within the allowance. and it was found to be necessary to improve the shape of the control unit as well as the flow incoming from the spillway to the tunnel section to be properly distributed. The result for the experiment 2 as a design scheme showed that the discharge capacity was very good. Additionally, in the approach channel, the approach velocity was found to be within the tolerance and to improve the central peer shape. In addition to that, in the spillway, it was shown that the pressure of the generating portion reaches within the allowance and a single discharge capacity as an auxiliary spillway for a constant discharge (about 4500 ㎥/s) is secured. Further, it was analyzed that the tunnel inflow is secured and the tunnel section secures the water level less than 70% even during PMF. In the experimental results for the design schemes: the experiment 1 and the experiment 2, it was demonstrated that in the experiment 2, unique features of the spillway structure and risky factors affecting the safety due to the tunnel tubing phenonenon were improved.

4제주도에서 분리한 미생물의 수질정화 성능 평가에 관한 연구

저자 : 김우석 ( Woo Suk Kim ) , 박준석 ( Jun Seok Park ) , 서대석 ( Dae Seuk Seo ) , 김봉균 ( Bong

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 35-46 (12 pages)

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In this study, we collected samples from rivers in Jeju Island and other places where the self-purification capacity of rivers had been recovered by utilizing effective microorganisms(EM). And then after separating microorganisms from among the samples, we evaluated each microorganism's water purification. In addition, we performed DNA sequencing by means of the 16S rRNA gene (16S rDNA) sequencing method for the identification of microorganisms capable of improving water quality and sought to register gene sequence information in GenBank at the National Center for Biotechnology Information (NCBI). According to the COD experiment results, C1, B4 and C6 showed the average removal efficiency of 21.3, 23.4 and 38.6% respectively. According to the T-N experiment results, the respective strains of B4, B6, M3 and C1 showed the average removal efficiency of 26.8, 34.9, 28.3 and 23.3% respectively. According to the T-P experiment results, the respective strains of B4, B6, C1 and C4 showed the average removal efficiency of 15.0, 19.4, 15.1 and 9.1% respectively. By examining the present study, it is judged that the strain of B6 has the best water purification performance. As a result of its identification, the strain of B6 showed 99.66% similarity to the strain of Bacillus subtilis. Moreover, the gene sequence information was registered in GenBank at NCBI in the USA, thereby being assigned the accession number of 'KU672511'.

5고상염소 소독장치의 잔류염소 농도 변화에 관한 연구

저자 : 김용철 ( Yong Cheol Kim ) , 이택순 ( Taek Soon Lee ) , 전준호 ( Jun Ho Jeon ) , 한치복 ( Chi

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 47-55 (9 pages)

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This study was to suggest the appropriate use of water disinfection equipment by using calcium hypochlorous acid [Ca(OCl)2] as a disinfectant. The experimental disinfection equipment consists of polypropylene filter and acrylic housing. The housing has six holes to adjust disinfective solution's volume. The disinfection equipment was installed in water tank(1 ton). The principle of disinfection equipment is that disinfective solution dissolved in PP filter was spilled outside through housing's hole and diffused in water tank. In case of steady state (closed system), optical disinfectant dose was 20 g in Water tank(1 ton). In case of unsteady state (water supply and outflow condition were applied), optical disinfectant dose was 40 g in water tank(1 ton). The experimental disinfection equipment is proved to be able to control the residual chlorine concentration in water tank by adjusting disinfectant'dose.

6인공폐수에서 생성된 Struvite 침전물을 이용한 토질개선제 생산기술 개발

저자 : 김기은 ( Gi Eun Kim )

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 57-67 (11 pages)

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Struvite crystallization process can be a practical solution in combination with conventional wastewater treatment for useful utilization of nitrogen and phosphorus. In this study an artificial wastewater has been used as a basic research material to remove ammonia nitrogen and phosphate with hydrogel, bentonite and carbonated coffee waste and the results were compared. These supplements do not stimulate N, P removal, but can simplify the isolation process of struvite crystal and utilization as nutrient resources for agriculture. With struvite crystallization process ammonia and phosphate could be removed 66%, 40%, from the artificial wastewater, respectively. By adding hydrogel, bentonite and carbonate coffee waste it was possible to remove much more, faster and more comfortable. And the complex can be delivered directly to the soil as a nutrient for plant growth. Crystallized struvite in artificial wastewater is absorbed in variable bentonite and hydrogel materials and then, immobilized with microbial cells from EM solution. Many kinds of EM products also have been used in agriculture for healthy soil. In this study a different type of soil conditioner have been developed in terms of a sustainable fertilizer and treatment of a wastewater as ammonia nitrogen and phosphate resources.

7하수처리장별 총인 시설계 슬러지의 인 흡착능 비교

저자 : 서정인 ( Jung In Suh ) , 권대원 ( Dae Won Kwon )

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 69-76 (8 pages)

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In this study, investigation was conducted to explore the phosphorus adsorption capacity of sludge(PS-sludge) generated during the total phosphorus(T-P) removal process of municipal wastewater treatment plants in order to evaluate their application potential as phosphorus adsorbent. The major metal contents of PS-sludges are Al, Fe, Mn, Ni, Zn and Cu. In addition, the sludges contained significant amount of T-P. The maximum phosphorus adsorption capacity is 8.38 mg-P/g. The experimental results indicate that PS-sludges show a strong phosphorus adsorption capacity and it could be utilized as a new type of adsorbent for phosphorus removal.

8공업지역에서 Eco-water의 생산을 위한 Birm + 막공정(UF) 적용시 수질특성 및 UF membrane 오염 특성 파악

저자 : 정진희 ( Jin Hee Jung ) , 이준희 ( Jun Hee Lee ) , 최영익 ( Young Ik Choi )

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 77-85 (9 pages)

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This study aimed to secure a supply of reclaimed wastewater using the Birm filter to eliminate the manganese during the pretreatment stage. Another purpose was to analyze the characteristics of the UF membrane fouling. In this study, there were no investigations on the residual chlorine level, the chloride criterion, and the ABS criterion. Owing to these missing criteria, the quality of the reclaimed wastewater was found to be substandard when compared to the required quality standards for reclaimed water. However, it complied with the SS, BOD, turbidity, and chromaticity standards and was therefore still suitable for landscaping, cleaning that does not involve human contact and industrial applications. The water treatment facilities in industrial areas did not seem to need the Birm filter, since the removal of Mn ions in the wastewater was not effective enough. However, when manganese removal is required, injection of calcium permanganate or chlorine can remove the oxidation. The study of the UF membrane fouling involved SEM and EDX analyses, which indicated that carbon and oxygen ions accounted for 47% of the overall composition, but there was no trace of inorganic matter. Furthermore, the difference in the recovery rate of the fouled membrane between acidic and alkali cleaning was more than 78%. In conclusion, the results indicated that organic matter contributes to membrane fouling whereas inorganic matter has no effect.

9메틸 에스테르화한 견운모를 이용한 수용액의 Pb와 Cd의 제거 특성

저자 : 최희정 ( Choi Hee Jeong )

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 87-100 (14 pages)

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The present communication addresses the development of a novel low cost material from sericite clay. The adsorbent material is then successfully utilized for efficient removal of Pb(II) and Cd(II) ions from aqueous solutions. Initially, sericite was annealed and activated with methyl-hydrochloric acid. The activation caused a significant increase in specific surface area of sericite, thereby provided a suitable surface structure for grafting of organosilanes. Batch reactor studies showed that increase in sorptive pH, contact time, initial concentration and dose of adsorbents significantly favored the sorption of Pb(II) and Cd(II). The equilibrium data obtained at various initial concentrations reasonably fit well with the Langmuir adsorption isotherm. The adsorption process was fast and the kinetic data fit better to the Pseudo-second order kinetic model. Pb(II) removal was found to be spontaneous and uptake process was endothermic in nature. Further, the intra-particle diffusion was found to be the rate-limiting step in the sorption of Pb(II) and Cd(II). Various physico-chemical parametric studies enabled to discuss the sorption mechanism of these contaminants at the solid/solution interface. Simultaneous sorption studies suggested that these two pollutants were possibly removed simultaneously by the prevailing hydrophilic and hydrophobic groups. Furthermore, desorption and reusability studies as well as the applicability of the material for wastewater treatment demonstrated that ME-sericite is a promising solid material for the efficient removal of two important water pollutants i.e., Pb(II) and Cd(II) from aqueous waste.

10직결-수직형 정수처리시설의 압력분포 특성에 관한 연구

저자 : 서인석 ( In-seok Seo ) , 김관엽 ( †guan-yeop Kim ) , 김성수 ( Seung-su Kim ) , 채선하 ( Seon

발행기관 : 한국수처리학회(구 한국수처리기술연구회) 간행물 : 한국수처리학회지 24권 4호 발행 연도 : 2016 페이지 : pp. 101-109 (9 pages)

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A empirical water treatment plant of 1,000㎥/day was operated to evaluate the operation and management of a direct coupled vertical type water treatment plant(WTP), which consists of ultrafiltration(UF), ozonation, granular activated carbon(GAC), and UV oxidation. The experiments were conducted under various inlet pressure conditions of UF in the range of 0.6~3.7kgf/㎠. Also fouling conditions of UF and GAC were considered. Operating pressures were controlled by adjusting the outlet valve of UV process and pressure data of unit processes were monitored in real time. Simulation using Fathom v.8 software program was conducted. As a result, experimentally measured and simulated results has a good correlation(R²=0.973). The key operating parameter in aspect of energy was UF fouling condition. The pressure was lowest at outlet of UF and negative value by siphon phenomena was observed in low pressure differential condition of UF and GAC. In condition of process combination of UF and GAC and lowed height, as a simulation results, lowering pumping height have a advantage in energy consumption and decrease possibility of negative pressure.

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한국환경복원녹화기술학회지
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한국물환경학회지
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한국환경분석학회지
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