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한국수처리학회지 update

Journal of Korea Society of Water Science and Technology

  • : 한국수처리학회
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수록정보
수록범위 : 1권1호(1993)~30권5호(2022) |수록논문 수 : 1,413
한국수처리학회지
30권5호(2022년 10월) 수록논문
최근 권호 논문
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KCI등재

저자 : 김석구 ( Seogku Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 5호 발행 연도 : 2022 페이지 : pp. 3-14 (12 pages)

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This study evaluated the degradation properties of lignocellulose in methanogenic and sulfate-reducing environment. Carbohydrates and aromatic compounds, which are lignocellulosic degradation products, were analyzed and the accumulation rates were calculated. Seeding microorganisms, as well as leachate from a model landfill reactor composed of a methanogenic and sulfate-reducing environment that hadbeen operatingfor more than three years wereused. To calculate the accumulation rates of carbohydrates and aromatic compounds, serum vials cultured for 12 days were subjected to 3% (volume ratio) toluene. Toluene was used to selectively inhibit the activity of microorganisms while maintaining the activity of the extracellular degrading enzyme. Galactose, glucose, xylose and mannose produced from holocellulose such as office paper and newspaper in the presence of 3% toluene showed a linear increase in carbohydrate accumulation with time in a sulfate-reducing environment. The accumulation rates of glucose and xylose in the sulfate-reducing environment were faster than in the methanogenic environment, indicating that holocellulose decomposition was faster in the sulfate-reducing environment than in the methanogenic environment. For the lignin-derived aromatic compounds produced in newspapers in the presence of 3% toluene, 7 aromatic compounds were identified in the sulfate-reducing environment, compared to 3 aromatic compounds identified in the methanogenic environment. Accumulation rates of benzoic acid and vanillin were faster in the sulfate-reducing environment than in the methanogenic environment, indicating that lignin degradation was faster in the sulfate-reducing environment than in the methanogenic environment.

KCI등재

저자 : 양혜지 ( Hye-ji Yang ) , 김연권 ( Youn-kwon Kim ) , 김지연 ( Ji-yeon Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 5호 발행 연도 : 2022 페이지 : pp. 15-22 (8 pages)

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In Korea, surface water has been used as a main water resource; in particular, upstream areas are mainly used as drinking water sources. Unfortunately, these areas are exposed to many pollutants, of which livestock manure used as compost is becoming a significant pollutant during rainfall events. The aim of this study is to evaluate the utilization of livestock manure generated in the upstream areas of adam as an energy resource. Anaerobic digestion processes are used for the biological degradation of organic wastes and for biogas generation. Therefore, in this study, the energy potential of livestock manure was evaluated for the prevention of inflow into the water bodies based onfour themes: the comparison of biogas generation by various types of livestock manure, the evaluation of the energy potential of livestock manure as a solid refuse fuel after anaerobic digestion, the composting period's effect on the biogas generation yield, and the ammonium nitrogen inhibition. The amount of biogas produced by cattle manure that lacked organic matter was the lowest, but it had the highest low calorific value of about 3,500 kcal/kg, which means that it can be used as a combustion aid substrate . It can be noted that the amount of biogas generated decreased due to the decomposition of organic matter as a result of the composting of cattle manure.

KCI등재

저자 : 정경태 ( Gyeong-tae Jeong ) , 정연구 ( Yeon-koo Jeong )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 5호 발행 연도 : 2022 페이지 : pp. 23-35 (13 pages)

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It is well-known that fruit processing beverage wastewater is one of the severely contaminated industrial wastewaters containing high BOD concentration. This makes it difficult to maintain the proper DO concentration needed in conventional aerobic wastewater treatment process unless the high BOD concentration is properly reduced by pretreatment processes such as anaerobic digestion. In this study, a full-scale high-efficiency bioreactor was applied to cope with the high BOD loading in fruit processing beverage wastewater as a pretreatment of the activated sludge process. The high-efficiency bioreactor, which has multiple draft-tubes for both internal circulation of mixed liquors and aeration, has a merit of requiring small land area for installation. The results of the full-scale high-efficiency bioreactor for fruit processing beverage wastewater treatment were compared with those of anaerobic filter. It was found that the high-efficiency bioreactor was greatly effective in aeration, maintaining a DO level of 2.47 mg/L on average. Substantial removal of pollutants were achieved in the high-efficiency bioreactor, which were 89.9% for BOD, 86.2% for CODMn, 57% for SS,78.9% for T-N, and 80.3% for T-P, while those of an aerobic filter were 45.5% for BOD, 43.1% for CODMn, 50.8% for SS, 55.3% for T-N, and 59.6% for T-P. Thus, it has been demonstrated that the high-efficiency bioreactor had good stability and suitability for the treatment of fruit processing beverage wastewater, as a pretreatment of conventional aerobic wastewater treatment.

KCI등재

저자 : 서인석 ( In-seok Seo ) , 김성수 ( Seung-su Kim ) , 한현 ( Hyun Han ) , 박상광 ( Sang-kwang Park ) , 정인식 ( In-sik Jung )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 5호 발행 연도 : 2022 페이지 : pp. 37-45 (9 pages)

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In this study, direct-coupled water treatment facilities with the capacity of 500 ㎥/day were installed and operated in Indonesia and Cambodia, respectively. In Indonesia, raw water was taken from the reservoir, and the water treatment plant for the process consisting of UF-AOP-GAC-Chlorination was installed horizontally. In Cambodia, groundwater was used as raw water, and the water treatment plant for the process consisting of UF-GAC-Chlorination was installed vertically. All water treatment plants were operated stably, and the produced water was suitable for drinking in terms of water quality standards. In the detailed evaluation of the unit process, the TMP of the UF process was stable at 0.35 ~ 0.4 kgf/㎠ when the raw water was groundwater with low turbidity, and chemical cleaning was unnecessary during the operation period of about 10 months; Meanwhile, in Indonesia where the turbidity of raw water is relatively high, the TMP was varying between 0.4 ~ 1.0 kgf/㎠ and chemical cleaning was required once a month. In addition, the differential pressure of GAC adsorber was maintained at a low level of 0.1 kgf/㎠ or less. Also, the electricity consumption was evaluated to be in the range from 0.23 to 0.26 kWh/㎥ for the operation of the Indonesian plant and 0.176 kWh/㎥ in Cambodia. The electricity consumption was significantly affected by the increase of TMP due to the turbidity of raw water, and the operating pressure needed to be minimized.

KCI등재

저자 : 남숙현 ( Sookhyun Nam ) , 이주원 ( Joowun Lee ) , 김은주 ( Eunju Kim ) , 구재욱 ( Jaewuk Koo ) , 황태문 ( Tae-mun Hwang )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 30권 5호 발행 연도 : 2022 페이지 : pp. 47-56 (10 pages)

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Microcystin-LR (MC-LR), the most widely known toxin produced in cyanobacteria, is problematic because of its toxicity. This study was carried out to evaluate the capability of ultraviolet photolysis of chlorine(UV/Cl2) and ultraviolet photolysis of hydrogen peroxide(UV/H2O2). Results showed that direct photolysis with 254 nm UV irradiation achieved substantial toxin removal. In particular, in UV/Cl2 oxidation treatment, the removal rate of MC-LR was improved through various radical reactions that were similar to UV/H2O2. In the UV/chlorine process at the pH of 7.0, UV irradiation amount of100 mJ/cm2 and chlorine concentration of 0.3 mg/L, the MC-LR removal rate was 52.0%, indicating that the removal rate was increased by 24% compared to the UV only treatment. In the UV/chlorine and UV/H2O2 process at pH 7.0, the first-order degradation rate constants of MC-LR were 3.1×10-3~3.6×10-3 s-1 and 2.9×10-3~3.7×10-3 s-1, respectively. It was shown that the degradation rate constant of MC-LR was lowered by 19.4% at pH 9.0 compared to that of pH 7.0, where the analysis found that the change in pH affected oxidation ability. UV/H2O2 was not affected by pH. This result affects the energy consumption needed to meet the required 90% elimination of MC-LR.

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