축사 매입에 따른 김제 용지 축사밀집지역의 수질개선 효과 분석

문하나 전북대학교 일반대학원 2022 국내석사

In this study, water quality improvement effects of actually operating cattle barns acquiring project (hereinafter, the project), which was implemented for the purpose of reducing the number of business, were analyzed. Through this, by identifying water quality changes due to the pollutant load change caused by the project in the study subject basin, it was attempted to predict the impact on conservation and improvement of water. Water quality from 2010 to 2020 in the basin improved slightly; however, water quality standards (very bad (VI)). The mean values of BOD, COD, T-N, and T-P was 8.7 mg/L, 16.5 mg/L, 8.742 mg/L, and 0.238 mg/L, respectively. Change in pollutant sources showed a decreasing tendency with the exception of Livestock Load and Land Load. The main pollutant source was the livestock business cluster in Yongji where mainly pigs were bred at three villages (Shinam, Biryong, and Shinheung) in the upstream region of Yongam stream. There are a total of 79 livestock farms in this area with 104,250.80㎡ of farm area. Total number of animals being bred here is 787,576, among them, pigs are 77,175. Comparing the number of pigs bred in the Saemangeum and Mangyeong river watershed with the corresponding basins. In the basin, the total number of pigs breeding heads accounted for 8.7% and 17.0% for Saemangeum and Mangyeong, respectively. This showed that the distribution of pigs breeding was significant compared to the basin area. By estimating the source of pollutant and discharge loads from the livestock business cluster we found that for each livestock type, total generated load was 12,258. 83 kg/day and 1,236.139 kg/day for BOD and T-P, respectively, and total discharge load was 1,103.30 kg/day for BOD. The load reduction due to the project estimated by assuming that the number of livestock heads in livestock business cluster will be decreased due to the project, the load reduction is estimated to be 1,103.30 kg/day and 92.710 kg/day for BOD and T-P, respectively. Assuming that the entire livestock businesses could be acquired for three years between 2022 and 2025, the expected cost was calculated to be 76.7 billion KRW in total, which included 19.6 billion KRW for land compensation, 24.3 billion KRW for buildings compensation, 10.4 billion KRW for compensation for business closure by livestock type, 20.7 billion KRW for restoration of ecosystem, and 0.17 billion KRW for miscellaneous fees. Cost-benefit analysis showed that there was a reduction in BOD (1.438 kg/100 million KRW) and T-P (0.12 kg/100 million KRW). It is reviewed that those figures are more effective than the reduction cost effect, BOD 1.181kg/100 milion KRW, T-P 92.710kg/100 milion KRW in livestock manure countermeasure part of the countermeasure of Saemangeum water quality improvement, which figures were believed to be the most effective. The effect of water quality improvement by acquiring livestock businesses in the cluster area was predicted by focusing on the Yongam stream, basin using HSPF(Hydrologic Simulation Program-Fortran) basin model. As a result of evaluating Yongam stream basin and downstream of Mangyeong River (Mangyeong bridge), BOD improved from 7.07 mg/L to 4.91 mg/L, showing an improvement of 30.46%. The BOD around the Mangyeong bridge improved from 2.27 mg/L to 2.24 mg/L, indicating an improvement of 1.41%. Such as previous projects, such as Wanggung livestock farms and Jangsu-Gyenam pig farms, acquiring project for livestock cluster area is a fundamental measure to manage livestock pollution source that can improve the environment in surrounding areas as well as improve the quality of waters.

전주천 국가하천 구간 수질오염 기여도 평가 및 보 철거에 따른 효과분석

이세정 전북대학교 일반대학원 2022 국내석사

전주천 하류의 수질 악화는 비점오염물질의 유입, 하수처리장 방류수, 복합하수류(CSO), 유량감소, 퇴적물 침출, 기타 미지의 오염물질 등 대내외적 요인이 복합적으로 작용하여 발생할 수 있습니다. 본 연구는 전주천국립천 구간의 현장조사, 수질모니터링, 퇴적물 모니터링, 식생특성분석을 통해 주요 오염물질을 분석하여 효율적이고 지속가능한 수질개선 방안을 제시하는 것을 목적으로 한다. 현장조사 결과, 하천 양쪽 배수문에서 오수자취나 폐수유입이 직접 확인됐다. 6시간마다(x4회) 42시간 동안 수질 모니터링을 통해 유기물 및 영양소의 농도 및 특성 변화를 분석하였다. 5보 상류 지점의 퇴적물 조사 결과 퇴적물이 오염된 것으로 평가되었다. 퇴적물 용출 실험에서 COD와 T-N은 높은 용출률을 보였으나 특정 시간에 한 번의 조사로 결론을 내리기에는 한계가 있었다. 전주천국하천 구간의 오염부하율 결과 오염부하의 기여율은 전주공공하수처리장 방류수 BOD 44.7%, COD 50.0%, TN 59.1%, TP 47.9%, 미지오염물질 BOD 31.5%, COD 38.0%, TN 37.9%, TP 30.1%, 식생 분해 TN 0.2%, TP 5.6%. 전주천 유역에서 배출되는 오염부하량을 최소화할 수 있는 '기반시설 정비' 사업과 오염원을 저감할 수 있는 '오염원 관리' 대책을 추진할 필요가 있다. 제안된 조치를 시행할 때 전주천6 모니터링 지점의 수질개선 효과는 BOD 34.2%, T-P 33.4%였다. 본 연구는 전주천국립하천구간의 오염부하 저감을 통해 만경강 및 새만금 유역의 수질환경 개선에 기여할 것으로 기대된다. 또한 유역에 대한 기초자료 축적 및 후속조사사업 추진의 기초자료로 활용될 수 있을 것으로 기대된다.

하수와 공장폐수 연계 고도처리시 공장폐수 수질과 혼합비가 처리효율에 미치는 영향

한진희 전북대학교 2006 국내석사

Abstract When quota load ammounts were calculates by the pollution total amount management system carrying out from two thousands five july, discharged load amounts of running J sweage treatment plant are expected to occupy most of Jeonju zone load amounts. It is necessary to study rational inflowed concentration of industrial wastewater for increase of treatment effects of sweage treatment plant programmed advanced wastewater treatment conversion. Therefore this study carryed out using industrial wastewater of A co. inflowed about 70% to J sweage treatment plant. The study results is as follows. A monthly average concentration of draing water of eight co. placed the second industrial complex of jeonju is enough satisfied draining water quality acceptable limit value(BOD5, CODMn, SS, 200mg/L, TN 60mg/L, TP 8mg/L) by BOD5 3.3~26.1mg/L, CODMn 22.2~91.8mg/L, SS 7.3~35.3mg/L, TN 3.4~20.5mg/L, TP 0.1~4.8mg/L. Industrial wastewater amounts inflowed within jeonju sewage treatment plant occupy a fifth part of sewage about 55,000ton/day. After due consideration, wastewater mixed draining water of industrial wastewater and sewage were applied for activated sludge process and CNR process. The results two process indicated not distingished differance of treatment efficiency, and it satisfied not BOD5 of the discharged water quality standard value of sweage treatment plant to intensify hereafter. Wastewater mixed by 1:5 draining water of industrial wastewater and sewage and wastewater mixed by 1:5 primary sedimataion water of industrial wastewater and sewage applied CNR precess respectively. Effluent concentration of the latter is lower than the former all items and satisfied BOD5 10mg/L, CODMn 40mg/L, SS 10mg/L, TN 20mg/L, TP 2mg/L of discharged water quality standard value of sweage treatment plant to intensify hereafter. Wastewater mixed by 1:5, 1:3 and 1:1 primary sedimataion water of industrial wastewater and sewage applied CNR precess respectively. BOD5, CODMn, SS of dischared water of wastewater mixed by 1:1 and SS of dischared water of wastewater mixed by 1:5, 1:3 exceeded discharged water quality standard value of sweage treatment plant. If that water should apply sand filtration process, will satisfy discharged water quality standard value of sweage treatment plant. To investigate advenced treatment efficiency of CSBR process wastewater mixed by 1:1 primary sedimataion water of industrial wastewater and sewage applied. Effluent concentration of CSBR process is lower than CNR process and satisfied not discharged water quality standard value of sweage treatment plant to intensify hereafter. In conclusion if it should treat wastewater mixed wastewater draining in jeonju industry complex of A co. and sewage, CNR process 1, 2 steps process wastewater mixed by 1:3~5 primary sedimataion water of industrial wastewater and sewage is best. satisfied discharged water quality standard value of sweage treatment plant to intensify hereafter and it is estimated that pollution total amount management system carried out hereafter is possible preparation.

화학공장 폐수의 생물학적 처리시 염분 농도의 영향

문명환 전북대학교 환경대학원 2008 국내석사

본 연구에서는 화학공장에서 배출되는 폐수의 염분성분이 생물학적 처리효율에 어떠한 영향을 나타내는지 알아보고자 화학공장 세 사업장을 선택하였으며,화학공장별 폐수의 염분농도 함유에따른 폐수처리결과를 확인하고, 이중 염분농도가포함되어 염분 변화가 있는 A 사업장의 폐수를 연구대상으로 하였다. 염분이 10,000mg/L ~ 14,000mg/L으로 배출된 A사업장 폐수에서 염분농도에 따른 COD변화,COD 제거율,SVI,미생물등을 조사하였다. 그 결과 포기조에 공급되는폐수의 염분농도가 높아질수록 방류수 COD가 높아지는 경향을 나타냈고, 반면에COD제거율은 낮게 나타났다. 그러나 염분농도가 높아지더라도 MLSS와 SVI의 변화하는 경향은 크게 나타나지는 않았다. 염분농도가 같을경우, F/M비가 높을경우, SVI가 다소 높게 나타나고, COD제거율이 높은 경향이 있었다. 염분농도 0 ~10,000mg/L이하에서 관측된 미생물은 Voticellar등 미생물이 다양하고 활동적인 미생물및 군락을 지어 활동하고 있었다.10,000 ~ 12,000mg/L에서는 섬모충류가 대부분이었고 사상균이 증가하기 시작했다. 염분농도 13,000mg/L이상일경우 처리효율이 떨어지면서 사상균이 급격히 증가하였다. 염분농도가 10,000mg/L 이상에서 대부분의 SV30은 90%으로 나타났으며, SVI가 슬러지 팽화상태인 200이상으로 관찰되었다.화학공장 특성상 폐수내 염분농도가 높게 배출되면서 독성물질이 함께 유입되고 이로 인하여 사상균이 증가하고 미생물종이 단순해짐을 알수있었다. This study was aimed of finding out the influence of the efficiency biological treatment of the salt concentration of chemical plant wastewater. And choose three chemical plant, after that select A chemical plant that has of varied concentration of the salinity. According to salinity(10,000 ~ 14,000 mg/L) the change of COD, COD removing ratio, SVI, microorganism is analyzed. The currency of COD was found higher when salinity is increased. Mean while the efficiency of the cut of COD ratio was low. But the currency of MLSS and SVI is not related of the salinity concentration. In case of same of the salinity concentration the results of SVI showed higher in the high of F/M ratio. The active microorganism including voticellars showed energetic act below 0 ~ 10,000 mg/L salinity concentration. In the concentration 10,000 ~ 12,000 mg/L salinity the microorganism was showed a lot free swimming ciliate and filament increased. In the concentration 13,000 mg/L salinity the efficiency removing COD decreased and filament increased significantly. Over the salinity concentration 10,000 mg/L most of the SV30 observed 90% and SVI index is over 200, lead increasing filament and fewer microorganism species.

수리권을 고려한 만경강유역 수환경변화에 대한 연구

이희재 전북대학교 일반대학원 2016 국내석사

Standard of water rights in domestic rivers is clearly suggested, but detailed intake water volume of river about approved intake water volume is not understood, so various problems of maintaining river ecosystem have arose. In addition, change of efflux in basin and non-point pollutant source has a major influence on change of water environment in river with a problem of water rights according to change of rainfall pattern because of the effect of hydrological factors by climatic change, so quantitative analysis is needed. To understand a problem in river by water rights of vague standard in rivers of South Korea quantitatively, this study understood basic present conditions of basin such as flux, water quality, and water utilization in the Mangyeong River basin, an object basin, applied RCP 4.5 among climatic change scenarios, established a scenario through change of water intake rate of use amount of approved water rights, and applicable return water, and analyzed excess rate of target water quality and expected efflux with load duration curve by using revised and verified SWAT model. As a result, a difference between consideration and non-consideration of return water has a considerable influence on excess rate of pollution loading amount, and if intake water volume is little in all expected points, excess rate of pollution loading amount decreases steadily. If return water rate by land use is established by lively study of return water quantity, and more accurate data of water usage is applied through improvement of water rights of vague standard, accuracy and reliability of study about change of water environment such as future plan of water supply and prediction of sulfur change will be raised.

단순 포기장치를 활용한 수돗물의 소독부산물 제거와 탈기특성에 관한 연구

차화정 전북대학교 2016 국내박사

It has been reported that major reasons for people to avoid tap water include the off-flavor from chlorination and vague anxiety such as disinfection by-products. This study thus set out to introduce the bubble-based air stripping method to promote the drinking of tap water and provide basic data to eliminate chlorine-based disinfectants and disinfection byproducts. A series of experiments and investigations led to the following conclusions: 1. The concentration of disinfection by-products tended to rise in G Water Treatment Plant based on lake water than D Water Treatment Plant based on river water. 2. Disinfection by-products and the general correlation coefficient of water quality items through (r), disinfection by-products, and a distinct correlation between a statistical correlation analysis result of water quality items It was hard to grasp. 3. As for the characteristics of disinfection by-products according to the types of storage, the concentration of THMs made almost a double increase after ten days in a closed container and dropped to 13 % after eight days and then disappeared in an open container. 4. The experiment results according to the types of storage showed a close correlation between residual chlorine and disinfection by-products, which suggests that people had better drink tap water right away. 5. The odor threshold of HOCl was mean annual + 0.39 ㎎/L and + 0.19 ㎎/L in D and G Water Treatment Plant, respectively, which makes it no wonder that many people chlorination off-flovor when drinking tap water. 6. This study evaluated the removal efficiency of disinfection by-products in the air stripping method in terms of water temperature and air supply rate, and found the following results: 1) Under the same air supply rate, the removal efficiency of THMs was 44 % and 79 % at the water temperature of 8.5 ℃ and 25.2 ℃, respectively, which means that the higher water temperature was, the higher the removal efficiency of disinfection by-products became. 2) Under the same water temperature condition of 18.2 ℃, the removal efficiency of THMs increased from 49 % at the air supply rate of 1.25 L/min to 67 % at the air supply rate of 5 L/min. 3) There were few changes to the concentration of HAAs according to the rising air supply rate, but the removal efficiency of CH and HANs increased according to the rising air supply rate. 7. The KLa values of THMs based on the air stripping method were as follows: 1) KLa was 0.438/min and 1.058/min at the tap water temperature of 12.4 ℃ and 25.2 ℃, respectively. 2) KLa was big in the order of CHCl3, CHCl2Br, CHClBr2, and CHBr3, and the order matches that of bigger Henry's Constant. 3) When a water temperature-based calculation formula was applied, the KLa values were similar to those of 1), which suggests that they can serve as basic tap water data. 4) The study examined KLa in deionized water and actual tap water and also the causes of differences in KLa according to water temperature and found that KLa was under the influence of water temperature, trace elements contained, and partial pressure of air. 8. The KLa values of THMs based on the micro-bubble flotation process were as follows: 1) It was 0.127/min at 20 ℃ of deionized water and 0.550/min in the air stripping process with a huge difference between the two processes. 2) The study examined the removal efficiency of THMs according to the specific surface area and volume of bubbles and found that the specific surface area was 6.32 ∼ 24.26 ㎍/㎥-air in the air stripping process and 352.1 ~ 823.7 ㎍/㎥-air in the micro-bubble flotation process. The volume of bubbles was 3.79 ~ 14.55 mg/㎥-air in the air stripping process and 2,134 ~ 4,991 mg/㎥-air in the micro-bubble flotation process. Those findings indicate that the amounts of THMs removals were much bigger in the micro-bubble flotation process. 3) The huge differences in KLa values between the two processes are attributed to the much less volume of absolute air in the micro-bubble flotation process. In addition, the average diameter of bubbles was 37.0 μm in the micro-bubble flotation process(it is 808.5 μm in the air stripping process), which means that micro-bubbles of relatively slower rise velocity were introduced and thus increased the vapor-liquid reaction time relatively. Those findings require further investigations, experiments, and discussion in the future. The findings of this study demonstrate that the air stripping method can serve as an economical and effective way to emit residual chlorine and disinfection by-products in tap water, but its practical application in field needs additional researches on the design of a air stripping system.

공급과정 재염소 분산주입 운영을 통한 수질 향상 연구

이기택 전북대학교 환경대학원 2018 국내석사

In the past, if we emphasized sanitary water mainly on disinfection treatment due to concerns about waterborne infectious diseases, paradigm has recently been transformed into tasty and healthy water as well as safe water with enhanced water quality standards. Therefore, government and Water service providers restriving to minimize the concentration of residual chlorine by strengthening the residual chlorine management system during the water purification plant and supply process. K-water aims to produce and supply clean tap water with less chlorine odor by implementing the residual chlorine equalization project in keeping with the needs of the citizens who want safe and healthy drinking of tap water. In order to maintain and equalize the residual chlorine concentration in the supply process, the residual chlorine in the water treatment plant is supplied to 0.8 mg/L or less. The re-chlorine injection facility is installed and operated in the process of sending and receiving to supplement the shortage of residual chlorine. Also, the residual chlorine concentration at the inlet of the reservoir is maintained at 0.4 mg/L or more so that the residual chlorine concentration of 0.1 mg/L or more can be secured in the water intake. The residual chlorine equalization project in the supply process maintains the proper concentration in time and space constantly without a rapid descent or rise according to the season and transfer distance from the water purification plant to the tap water reservoir, thereby reducing the chlorine odor and improving the tap water drinking rate and disinfection by-And to improve the water quality management process in the supply process. In this study, we introduced and operated a method of dispersing and injecting re-chlorine by operating two re-chlorine injection facilities on the water pipeline in order to equalize the residual chlorine in the entire water pipe and to ensure the proper concentration of residual chlorine in the reservoir. This study was conducted to investigate the level of equalization of residual chlorine concentration during tap water supply process and to investigate whether proper residual chlorine is ensured to the reservoir and whether water quality improvement such as change of disinfection by - product concentration is effective. As a result of this operation, it was adjusted down to 0.8 mg/L lower than 1.0 mg/L which is the upper limit of residual chlorine in the water treatment plant by dispersing and injecting the chlorine in the supply process, and the existing chlorine was lowered by 0.12 mg/L The installed chlorine remained operating throughout the year to maintain the appropriate residual chlorine in the endpoint reservoir. The variation of residual chlorine concentration was 0.24~0.77 mg/L before the improvement, 0.53 mg/L was the variation width and 0.29~ 0.61 mg/L after the improvement. The fluctuation range was 0.32 mg/L, which was lowered to 40 % to reduce chlorine odor. The residual chlorine equalization width was improved to 2 times in winter, 1.9 times in spring and 1.5 times in summer, and the average residual chlorine equalization width was improved 1.8 times. After the improvement of THM concentration, water treatment plants decreased 15 % on the average and 2.9~10.7 % on the supply side. HAA decreased 16.9 %, 16.8 %, and 31.3 %, respectively. The amount of liquid chlorine used and the unit cost of water treatment plants were reduced by 15 % by 0.29 won/m3 after the improvement, and the amount of disinfectant used was increased by replenishing the remaining chlorine with the chlorine in the supply process. However, the use of total disinfectant was reduced by 0.07 won/m3, which was 4 %.

오염원 관리방안에 따른 전라북도 섬진강 수계의 수질개선에 관한 연구

박찬영 전북대학교 일반대학원 2016 국내석사

This country has conducted Total Pollutant Load Management System to manage and improve a water quality of a river, and has tried to prevent environmental pollution. A water quality will be contaminated by the economic growth, so policy and study should be studied and developed to keep in step with the economic growth. This study formed a scenario to improve a water quality by expecting and analyzing a water quality of Jeollabuk-do Seomjingang water system, so calculated a result. Jeollabuk-do Seomjingang water system in 2020 expected on the basis of 2012 is similar to a system in 2012, but rises slightly, and pollution of water quality increases by joining of each branch river. Therefore, contribution ratio was calculated by balancing 58 model input materials, and 3 places were selected and analyzed to calculate a hot degree by pollutant input materials by branch rivers. A result of an analysis showed that the cause is sewage disposal plant, and domestic, livestock, and land point and non-point pollution sources. This study expected and compared a water quality of Jeollabuk-do Seomjingang water system in 2020 according to a solution of hot degree causes, by forming a scenario. As a result, it was analyzed that a water quality is improved at 15.32% of the maximum BOD, 7.17% of T-N, and 62.86% of T-P according to domestic and livestock cut amount by reinforcing discharge water of sewage disposal plant and improving pollutant management plans. It was analyzed that supplementing various cut plans such as establishment of efficient cut plans, plans to decrease pollution loading amount, plans to increase sewage disposal efficiently, pollutant decrease through an expansion of sewage disposal area, and energy recovery from animal dung of Total Pollutant Load Management System, and developing a study on more efficient improvement plans of water quality by considering natural increase and economic development are efficient in an improvement in a water quality.

전북혁신도시 수질복원센터 운영사례 연구보고서

인승렬 전북대학교 환경대학원 2017 국내석사

전북혁신도시 수질복원센터에서 처리한 방류수는 조존천으로 방류되어 최종 만경강으로 유입된다. 만경강 하류는 새만금이 위치하고 있으므로 새만금의 수질을 보전하기 하기 위하여 하천의 목표수질을 유지하여야 한다. 전북혁신도시 수질복원센터의 수질은 법적인 기준이하로 수질이 유지되고 있지만 앞으로 전주 완주혁신도시및 전주 만성지구의 유입인구가 증가하고 있어 하수 유량이 증가 될 것으로 예상되며 현재 운영되고 있는 지표를 분석하고 향후에 기준을 마련하고자 한다.

공장폐수내 난분해성 유기물이 하수처리장 운영관리에 미치는 영향 연구

이형재 전북대학교 환경대학원 2008 국내석사

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