논문 상세보기

한국수처리학회> 한국수처리학회지> 상수관로 고유속 관망 설계 적용에 따른 효과분석

KCI등재

상수관로 고유속 관망 설계 적용에 따른 효과분석

Effectiveness Analysis of High Velocity Water Distribution Network Design

박정수 ( Jeong-soo Park ) , 이호민 ( Ho Min Lee ) , 배철호 ( Cheol-ho Bae ) , 최태호 ( Tae-ho Choi ) , 이승엽 ( Seungyub Lee )
  • : 한국수처리학회
  • : 한국수처리학회지 29권6호
  • : 연속간행물
  • : 2021년 12월
  • : 3-11(9pages)
한국수처리학회지

DOI

10.17640/KSWST.2021.29.6.3


목차

1. 서론
2. 연구방법
3. 연구결과
4. 결론
References

키워드 보기


초록 보기

Traditional water distribution network (WDN) design approaches have primarily focused on fulfilling hydraulic conditions such as water pressure and demand while placing less emphasis on water quality issues. Owing to a large number of documented water quality failures, there has been an increasing interest in water quality management throughout the design or operational phases of WDNs. This paper presents a novel approach for designing high-velocity WDNs to improve water quality security and satisfy the hydraulics of the network. The following is a summary of the procedures: (1) define the hydraulic and water quality factors, (2) determine the network layout using the modified branched index, and (3) determine the pipe diameter in the network to achieve self-cleaning velocity. The proposed approach was applied to a portion of the CW city network. As a result, the network layout was transformed to a branched network to reduce the number of pipes that did not meet the self-cleaning velocity requirements. If the pipe did not achieve self-cleaning velocity after transforming the layout, additional pipe diameter adjustments were made to satisfy the self-cleaning velocity requirements. Owing to this effort, the length of the network was reduced, and 78.8% of the pipes achieved self-cleaning velocity. In addition, water age at dead-ends and changes in water age were minimized, allowing for efficient water quality management of the network.

UCI(KEPA)

I410-ECN-0102-2022-500-000944844

간행물정보

  • : 공학분야  > 환경공학
  • : KCI등재
  • :
  • : 격월
  • : 1225-7192
  • : 2289-0076
  • : 학술지
  • : 연속간행물
  • : 1993-2022
  • : 1396


저작권 안내

한국학술정보㈜의 모든 학술 자료는 각 학회 및 기관과 저작권 계약을 통해 제공하고 있습니다.

이에 본 자료를 상업적 이용, 무단 배포 등 불법적으로 이용할 시에는 저작권법 및 관계법령에 따른 책임을 질 수 있습니다.

30권2호(2022년 04월) 수록논문
최근 권호 논문
| | | |

KCI등재

1원심분리를 통한 음식물쓰레기 바이오차의 탈수 특성

저자 : 안광호 ( Kwang-ho Ahn ) , 이예은 ( Ye-eun Lee ) , 신동철 ( Dong-chul Shin ) , 정진홍 ( Jinhong Jung ) , 정윤아 ( Yoonah Jeong ) , 김이태 ( I-tae Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 2호 발행 연도 : 2022 페이지 : pp. 3-10 (8 pages)

다운로드

(기관인증 필요)

초록보기

Various methods of technology for using food waste as energy have been developed, but their utility as fuel is low due to the salt concentration contained in food waste. As of 2019, the daily amount of domestic food waste is approximately 14,000 tons, and as the amount of food waste increases, it is necessary to develop technology for processing a large amount of food. Bio-char made from food waste can be a good fuel with high calorific value if salt is removed. In this study, a centrifugal separator was used to remove chloride ions from bio-char, and as a result of the experiment, the higher heating value(HHV) was improved through centrifugation. Food waste bio-char showed higher calorific value as the particle size was smaller, and higher calorific value was improved by 15~25% after centrifugation than before centrifugation. As for the chlorine component removal efficiency before and after centrifugation, the smaller the particle size, the higher the chloride ion removal efficiency. After centrifugation, the moisture of bio-char was 21.7~30.4%, and the ultimate analyzes of bio-char were found the most in the order of carbon, oxygen, hydrogen, and nitrogen, and no sulfur component was detected. As a result of water quality analysis, the dewatering water after centrifugation showed the degree of contamination of sewage was shown.

KCI등재

2초미세기포를 이용한 저수지 내의 조류 및 원인물질 제어

저자 : 정호진 ( Ho-jin Chung ) , 김종규 ( Jong-kyu Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 2호 발행 연도 : 2022 페이지 : pp. 11-20 (10 pages)

다운로드

(기관인증 필요)

초록보기

This study evaluated the efficiency of algae control and the recurrence of algae over time using a water treatment system based on the generation of ultra-fine bubbles. As a result of the experiment, the pre-treated water that passed through the VCF pre-treatment system showed a slight chromaticity, but the organic and suspended substances and algae with a size of 10 μm or more were almost removed, and the concentration of COD, T-N, and T-P was reduced by 31%, 36%, and 19%. In the case of the final treated water, chlorophyll-a was reduced by 99.9%, and COD, T-N, and T-P, which are the causative substances of algae, were reduced by 95%, 96% and 94% compared to the raw water. As a result of monitoring the algae reproduction for 5 weeks, it was confirmed that the algae reproduction was controlled to be low for 5 weeks by ultra-fine bubbles, and the algae reproduction progressed after 5 weeks. Since ultra-fine bubbles can exist in water for a long time, if ultra-fine bubbles are continuously supplied to reservoirs or rivers where algae are generated, algae can be controlled eco-friendly without using chemicals. In addition, the water treatment system using ultra-fine bubbles is considered to be a new method to overcome the limitations of the algae removal method, such as eco-friendliness, persistence, and field applicability.

KCI등재

3불용성 전극을 이용한 착유세척수 전처리특성 연구

저자 : 왕영준 ( Youngjun Wang ) , 정종태 ( Jongtai Jung ) , 한상윤 ( Sangyun Han )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 2호 발행 연도 : 2022 페이지 : pp. 21-27 (7 pages)

다운로드

(기관인증 필요)

초록보기

Dairy farmers are required to have a purification facility that meets the legalization of unlicensed livestock and the increasingly stringent effluent water quality standards, with the alternative requirement of consignment treatment application. However, there is no defined standard model that addresses these requirements. Furthermore, even with a purification facility in place, many cases exist in which the purpose of the facility loses its significance because it does not meet the effluent water quality standard. For this reason, the National Institute of Livestock Research published the “Technical Guideline for Purification of Milk Washing Wastewater” in 2016, including data from the Livestock Environment Management Agency which evaluates methods relevant to dairy farmers, including the use of milking washing water purification facilities, livestock manure treatment facilities, and other related technical applications. However, a standard model has not yet been established. In this study, a non-aggregation electrolytic oxidation experiment was performed on raw water used as milking washing water. The results showed that the efficiency of the treatment of total nitrogen and ammonia nitrogen increased proportionally with treatment time, resulting in a removal rate of 81.8% of total nitrogen and 80.7% of ammonia nitrogen. In addition, the results demonstrated that the chromaticity item also increased proportionally to the oxidation time. When considering the water quality measurements of organic substances (BOD5 and CODMn), the treatment efficiency was determined to be limited, with the removal of organic substances limited by the single electrolysis process.

KCI등재

4미세기포를 이용한 Chlorella sp. 제거에 관한 연구

저자 : 조규진 ( Kyu-jin Cho ) , 박상원 ( Sang-won Park )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 2호 발행 연도 : 2022 페이지 : pp. 29-39 (11 pages)

다운로드

(기관인증 필요)

초록보기

This study carried out zeta potential measurements of Chlorella sp. under various solution conditions and investigated its characteristics through implementation of size control of the microbubbles in order to eliminate algae whichis problematic for both aquatic ecosystems and human activities. The DAF process was adopted and several coagulants were used to remove the Chlorella sp. A CCD Camera was used to measure and analyze the sizes of the microbubbles, and a fluorescent microscope was used to observe particles, algae species, and the community as a whole. Zeta potential behavior of the algae was analyzed using ELS-Z. Both lab-scale and pilot-scale experiments were conducted to test the flotation process. Polyaluminium chloride(PAC) coagulant was used, and the removal efficiency of the algae was assessed through chlorophyll-a analysis. In the lab-scale experiment, 2.2 mg/L, 11 mg/L, 22 mg/L, and 44 mg/L of polyaluminium chloride were injected to coagulate the algae. The microbubbles, whichwere generated at an air pressure of 450-550 kPa, caused the coagulated algae to float. The microbubble size was controlled at 36 ㎛, 100 ㎛, and 200 ㎛ by using different diffusers. The results of the lab-scale experiments on the flotation plant indicated that the average removal rate was about 90% or above for 11 mg/L, 22 mg/L, and 44 mg/L of polyaluminium chloride. On the other hand, in the pilot-scale experiment, the removal efficiency was 85%-95% in all dose ranges of polyalumium chloride and aluminium sulfate coagulants.

1
권호별 보기
같은 권호 다른 논문
| | | | 다운로드

KCI등재

1상수관로 고유속 관망 설계 적용에 따른 효과분석

저자 : 박정수 ( Jeong-soo Park ) , 이호민 ( Ho Min Lee ) , 배철호 ( Cheol-ho Bae ) , 최태호 ( Tae-ho Choi ) , 이승엽 ( Seungyub Lee )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 6호 발행 연도 : 2021 페이지 : pp. 3-11 (9 pages)

다운로드

(기관인증 필요)

초록보기

Traditional water distribution network (WDN) design approaches have primarily focused on fulfilling hydraulic conditions such as water pressure and demand while placing less emphasis on water quality issues. Owing to a large number of documented water quality failures, there has been an increasing interest in water quality management throughout the design or operational phases of WDNs. This paper presents a novel approach for designing high-velocity WDNs to improve water quality security and satisfy the hydraulics of the network. The following is a summary of the procedures: (1) define the hydraulic and water quality factors, (2) determine the network layout using the modified branched index, and (3) determine the pipe diameter in the network to achieve self-cleaning velocity. The proposed approach was applied to a portion of the CW city network. As a result, the network layout was transformed to a branched network to reduce the number of pipes that did not meet the self-cleaning velocity requirements. If the pipe did not achieve self-cleaning velocity after transforming the layout, additional pipe diameter adjustments were made to satisfy the self-cleaning velocity requirements. Owing to this effort, the length of the network was reduced, and 78.8% of the pipes achieved self-cleaning velocity. In addition, water age at dead-ends and changes in water age were minimized, allowing for efficient water quality management of the network.

KCI등재

2질소화합물에 의한 녹조 현상의 발생과정에서의 온도 영향에 관한 열역학적 기초연구

저자 : 김선호 ( Sunho Kim ) , 송혜원 ( Hyewon Song ) , 김동수 ( Dong-su Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 6호 발행 연도 : 2021 페이지 : pp. 13-20 (8 pages)

다운로드

(기관인증 필요)

초록보기

Nitrogen is a very common element both in the atmosphere and in the water. The effect on temperature to the nitrogen compounds has been observed by constructing the nitrogen-water Pourbaix Diagram at 278 K, 288 K, 298 K, 308 K, and 318 K. Typically, between pH -2 to 16, nitrogen was examined to be stable as NO3 -, NH4 +, NO2 -, and NH4OH. The absolute values of the slope of the boundary line between each chemical species were shown to increase as the temperature increases. The area of each chemical species in a stable state was calculated to compare the tendency of existing form of each chemical species. The areas of the stable region for NH4 + was observed to decrease with temperature, while those for NO3 -, NH4OH, and NO2 - were investigated to increase linearly as the temperature increases. The thermodynamical calculation applied in this study is expected to be further studied and applied to water control and purification of water from contamination such as algal bloom.

KCI등재

3유량-유달부하량 관계식을 이용한 용전천 및 단장천의 수질특성 평가

저자 : 최시영 ( Siyoung Choi ) , 이남주 ( Namjoo Lee ) , 임수빈 ( Soobin Yim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 6호 발행 연도 : 2021 페이지 : pp. 21-31 (11 pages)

다운로드

(기관인증 필요)

초록보기

This study was conducted to identify the runoff characteristics of Yongjeon and Danjang streams, tributaries of Nakdong river basin, through analyzing the flow rate-delivery pollution loading curves and the correlation of water quality factors. The flow rate-delivery pollutant concentration curve analysis exhibited that the water concentration of pollutants increased as the flow rate increased, but it was difficult to derive a correlation formula that could accurately predict changes in water concentration. In the flow rate-delivery pollution loading equation analysis for Yongjeon stream, the flow coefficient of TOC and T-N items were found to have 1.396 and 1.304, respectively, and the flow coefficient of T-P showed a high correlation of 1.606 and the determination coefficient (R2) of the relational expression was mostly 0.93 or higher. In the case of Danjang stream, TOC, T-N, and T-P items showed flow coefficient values of 1.347, 1.232, and 1.301, respectively, and the determination coefficient (R2) of the relational expression was higher than 0.95. These results suggest that Yongjeon and Danjang streams are watersheds with runoff characteristics that increase the organic and nutrient loadings as the flow rate increases. In Yongjeon stream, the flow rate (Q) correlated turbidity with high positive (+) and relatively high positive (+) correlation with TOC, T-N and NO3-N items (p<0.01). For Danjang stream, the flow rate (Q) revealed a relatively high positive (+) correlation with turbidity, TOC and T-P items (p<0.01), and negative (-) correlation with EC (p<0.01).

KCI등재

4프러시안블루 및 유기점토 함유 하이드로겔 비드의 세슘 및 요오드 제거 특성

저자 : 김복성 ( Bokseong Kim ) , 강성원 ( Sungwon Kang )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 6호 발행 연도 : 2021 페이지 : pp. 33-41 (9 pages)

다운로드

(기관인증 필요)

초록보기

Radiation severely damages the environment in the event of a radioactive explosion, such as the one that occurred at the Fukushima nuclear power plant in 2011. Radioactive cesium and radioactive iodine, in particular, are known to be the main causes of environmental pollution. This study aimed to develop a composite adsorbent that can remove Cs+ and I- from a waterbody simultaneously. Prussian blue (PB) and organoclay are known to be effective in adsorbing cesium and iodide, respectively. Therefore, an organoclay-PB in alginate (OPAL) bead with layer-by-layer synthesis was developed. Fourier-transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric (TG) analyses were used to determine if organoclay and PB were synthesized in the OPAL bead. According to the isothermal adsorption experimental results, the maximum adsorption capacity of Cs+ and I- obtained using the Langmuir isotherm model was 26.4 and 3.39 mg/g, respectively. The adsorption rate of Cs+ on the OPAL bead was found to be fast in a dual solute adsorption system. The adsorption capacity of the single and dual solute adsorption systems for Cs+ ions increased rapidly up to 1 h, and the adsorption equilibrium was attained 3 h later. The dual solute adsorption system had a higher adsorption rate for I- ions. This demonstrates that the developed composite adsorbent can be used to remove Cs+ and I- from water simultaneously.

KCI등재

5하수처리시설에서 공정별 황화수소와 복합악취 발생 특성 및 상관분석

저자 : 이길수 ( Kilsoo Lee ) , 한상집 ( Sangzib Han ) , 나경주 ( Kyeong-ju Na ) , 이채영 ( Chaeyoung Lee )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 6호 발행 연도 : 2021 페이지 : pp. 43-50 (8 pages)

다운로드

(기관인증 필요)

초록보기

Although sewage treatment plants play an important role in water purification, odors from the facilities are frequently a source of complaints, eliciting objections from both plant workers and neighbors. Hydrogen sulfide is a natural by-product of anaerobic digestion that has a strong, unpleasant odor. Therefore, many researchers in Korea have attempted to characterize odors emitted by sewage treatment plants in odor to reduce their emissions. However, these researches have primarily focused on odor intensity scales or the measurement of odor compounds in several sites without considering detailed information of the statistical analysis. In this study, using 75th percentile of unit processes as the complex odor, the operations connected with sludge thickening were discovered to be the main emission sources of odorous substances, followed by primary settling, equalization, anaerobic, dewatering, anoxic, preliminary treatment, and aerobic processes. These results will be aid in identifying major odor sources associated with sewage treatment processes and prioritizing an odor control plan. In this study, the possibility of predict complex odor from hydrogen sulfide concentrations was considered when performing correlation and regression analysis. It could be used to define the requirements for installing odor eliminators and establishing odor regulations in sewage treatment plants.

KCI등재

6상수도관로 비파괴 진단을 위한 정책제안

저자 : 공명식 ( Myeongsik Kong ) , 곽필재 ( Pilljae Kwak )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 6호 발행 연도 : 2021 페이지 : pp. 51-59 (9 pages)

다운로드

(기관인증 필요)

초록보기

Nondestructive diagnostic technology can be used to check for abnormalities such as metal loss, deformation, and cracks in water pipelines. However, new standards and guidelines for water pipeline maintenance must be revised or established in order to apply new technologies such as nondestructive diagnosis to the field. Herein, policies and guidelines are proposed for the diagnosis of water pipelines using nondestructive technology. Amendments are proposed to allow accurate and reliable nondestructive diagnostic technology to be applied to pipeline maintenance by reviewing the diagnostic standards and laws for water pipelines. The design standards for water conveyance, water transmission, and water distribution pipelines have been revised in order to use advanced technologies such as nondestructive technology to identify abnormalities while minimizing the impact on facilities when inspecting and diagnosing water pipelines. In addition, a revision of the detailed guidelines of the Ministry of Land, Infrastructure, and Transport according to the KS and ASTM standard is required to allow for the use of nondestructive equipment when inspecting welds. Nondestructive diagnostic guidelines that summarize the characteristics and performance of nondestructive diagnostic equipment, diagnostic procedures, and verification processes are also proposed to help managers understand the technology and easily apply it in the field when diagnosing water pipelines.

1
발행기관 최신논문
자료제공: 네이버학술정보
발행기관 최신논문
자료제공: 네이버학술정보

내가 찾은 최근 검색어

최근 열람 자료

맞춤 논문

보관함

내 보관함
공유한 보관함

1:1문의

닫기