• 자원리싸이클링
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• 제9권4호
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• pp.56-62
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• 2000

본 연구에서는 하.폐수 처리를 효과적으로 할 수 있도록 각종 비금속 광물들을 혼합하여 부착성 및 토양 미생물의 활동을 촉진시킬 수 있게 광물 소결체를 이용한 합병정화조를 도입하여 주택용 소규모의 생활 하수를 발생원에서 바로 처리하기 위하여 단독주택 2가구를 대상으로 소규모형 무산소-호기 공정 합병정화조 실험 장치를 설치하여 실험하였다. 그 결과 COD.BOD의 방류수는 10mg/l 전후로 나타났고 총질소 (T-N)는 60~70% 정도까지 제거시킴으로 인해 외부에서 탄소원을 첨가하지 않고도 탈질을 할 수 있음을 확인 할 수 있었다. 또한 춤인(T-P)은 80%이상의 제거 효율을 나타내어 생물학적 처리 가능성을 확인할 수 있었다.

• 환경위생공학
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• 제19권3호
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• pp.31-39
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• 2004

In order to reduce the pollution load from the livestock farms and to improve the water quality of the effluent in livestock wastewater, the electrolysis system is introduced. For the selection of optimal electrode, various combination of electrodes such as carbon, Al and Fe were examined. In this study, electrode material, electrolyte concentration, electrode distance, current density, and pH value were found to have significant effect on both pollutant removal efficiency and current efficiency in electrochemical oxidation process. After electrolysis for 90 min with carbon/Al, it was observed that COD, T-N, T-P and $NH_4^+-N$ of livestock waste-water were removed with $80\%,\;61\%,\;81\%\;and\;87\%$, respectively.

• 한국환경보건학회지
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• 제36권6호
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• pp.502-509
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• 2010

In this study, the (phosphorous removal) the characteristics of phosphorous removal due to (the iron compound precipitated) iron compound precipitation by iron electrolysis in (the anoxic. oxic process) anoxic and oxic processes (equipped with the) in an iron precipitation device were analyzed. During the device operation period, the average concentration of BOD, T-N, and T-P were 219.9 mg/l, 54.6 mg/l and 6.71 mg/l, respectively. The BOD/$COD_{Cr}$ ratio was 0.74, and the BOD/T-N and BOD/T-P ratios were 4.0 and 32.8, respectively. The removal rate of (the organic matters) organic matter (BOD and $COD_{Cr}$) was very high at 91.6% or higher, and that of nitrogen was 80.5%. The phosphorous concentration (of the final) in the treated water was 0.43 mg/l (0.05-0.74 mg/l) on average, and the removal efficiency was high at 90.8%. The soluble T-P concentrations in (an) the anoxic reactor, oxic reactor (II) and final treated water were 1.99 mg/l, 0.79 mg/l and 0.43 mg/l, respectively, which indicated that the phosphorous concentration in the treated water was very low. Regardless of the changes in the concentrations of (organic matters) organic matter, nitrogen and phosphorous in the influent, the quality of the treated water was relatively stable and high. The removal rate of T-P somewhat increased with the increase in the F/M ratio in the influent, and it also linearly increased in proportion to the T-P loading rate in the influent. In the treatment process used in this study, phosphorous was removed (using) by the precipitated iron oxide. Therefore, the consumption of organic (matters) matter for biological phosphorus removal was minimized and (most of the organic matters were) was mostly used as the organic carbon source for the denitrification in the anoxic reactor. This (can be an economic) treatment process (without the need for the supply of additional organic matters) is economic and does not require the supply of additional organic matter.

• 한국토양비료학회지
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• 제44권2호
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• pp.263-270
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• 2011

주암호 상수원 상류지역에 위치한 복내 바이오파크 인공습지의 수생태학적 효율 향상을 위한 관리 방안을 제시하기 위하여 시기별, 계절별 및 오염물질 부하량별 수처리 효율을 평가하였다. 유입원수의 BOD, SS, T-N 및 T-P의 함량은 각각 1.87-4.23, 5.2-24.0, 4.94-15.59 및 $0.10-0.75mg\;L^{-1}$ 범위이었으며, 연평균 처리효율은 BOD, SS, T-N 및 T-P가 각각 26, 43, 62 및 83%로서 BOD 처리효율은 낮았으나 T-N과 T-P 처리효율은 매우 높았다. 계절별 수처리 효율은 전반적으로 동절기에 비하여 하절기에 높았으며 T-P의 처리효율은 계절적인 차이 없이 비교적 일정하게 높은 처리효율을 보였다. 인공습지 구성시스템별 오염물질 부하량에 따른 오염물질 처리량은 BOD는 침강지 > 습지조 > 마이크로폴, T-N과 SS는 습지조 > 침강지 > 마이크로폴 순이었으며 T-P의 경우에는 습지 구성 시스템별 큰 차이 없이 비교적 일정한 처리량을 보였다.

• 한국토양비료학회지
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• 제44권3호
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• pp.434-441
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• 2011

축산농가에서 소규모로 발생하는 고농도의 질소와 인을 함유한 축산폐수의 처리효율을 극대화시키기 위해 수생식물여과조-활성슬러지조-인공습지로 구성된 축산폐수처리 시스템에서 축산폐수 재주입 비율별 및 주입방법별 수처리 효율을 조사하였다. 축산폐수의 재주입 비율별에 따른 처리효율을 조사한 결과 COD, SS, T-N 및 T-P 처리효율은 30% < 70% ${\leq}$ 100%의 순으로 재주입 비율이 증가함에 따라 오염물질의 처리효율이 점점 증가하는 경향이었다. 또한, 주입방법에 따른 COD, SS, T-N 및 T-P의 처리효율을 조사한 결과 1차 및 2차 처리조까지는 연속적 주입이 간헐적 주입에 비해 약간 높은 처리효율을 보였으나, 3차 처리조 부터는 비슷한 처리효율을 보였으며, 방류수 중COD, SS, T-N 및 T-P의 처리효율은 연속주입방법이 각각 99.5, 99.8, 99.0 및 99.8%로 간헐주입에 비해 약간 높았다. 이들 결과를 미루어 볼 때, 본 현장 인공습지 축산 폐수처리장에서 은 적합한 축산폐수의 재주입 비율과 주입방법을 선정한다면 질소 및 인 처리효율을 향상 시킬 수 있을 것으로 판단된다.

• Current Research on Agriculture and Life Sciences
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• 제29권
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• pp.75-81
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• 2011

This study performed field examinations of a zero discharge and reuse system developed by Hong and Choi(2009). The system installed one of villages located in Hyoryeong-myeon, Gunwee-gun for the experiments. The zero discharge and reuse system consists of anoxic, FES (Ferrous Electricity System), Oxic, Cralifier processes for water treatments. The main feature of the system is to remove phosphorous by using Fe-ionizing module within the FES process. The water purification performances of the system were evaluated, while any defects for using the system were investigated through the field monitoring. It was found that the removal capacities of T-P, T-N, and BOD of the system meet the required water quality with outstanding performance from T-P by obtaining the results of over 90 % removal rates. The efficiency of T-P removal rate of the system found to be greatly influenced by whether using an automatic washing system to the Fe-ionizing module and conducting replacement of iron plate within a proper period.

• 환경위생공학
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• 제23권3호
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• pp.23-30
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• 2008

This study was carried out to get efficient of nutrient removal effects on the treatment of paper making wastewater using submerged biological film process. The concentration of average BOD at raw wastewater was $324mg/{\ell}$ and COD was $435mg/{\ell}$. The average BOD of effluent was maintained $24.2mg/{\ell}$ and average COD was $37mg/{\ell}$. The concentration of average T-N at raw wastewater was $16.5mg/{\ell}$ and T-P was $1.2mg/{\ell}$. The average T-P of effluent was maintained $2.3mg/{\ell}$ and average T-P was $0.08mg/{\ell}$. The concentration of average SS at influent wastewater was $263mg/{\ell}$. The average SS of effluent was maintained $28.2mg/{\ell}$. The result of this experiment was wastage sludge did generated and the removal efficiency of nutrients were kept equilibrium.

• 상하수도학회지
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• 제13권1호
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• pp.81-94
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• 1999

This study aims at a proposal of the plan that can improve raw water quality by an experimental study using influent water of Nak-dong river, which has been used as raw water for drinking in U-city, through the establishment of the submerged biofilter process PILOT PLANT of media packing channel method. From the analysis of removal efficiency for each water quality item of the collected sample, following results are obtained. First of all, the removal rate of suspended material, BOD, COD, T-N, TOC, turbidity, and $NH_3$ -N appear 82%, 78%, 42%, 15%, 57%, 43%, 54%, and 55% respectively and it is known that the submerged biofilter process of media packing channel method takes effects on water quality improvement from the above analysis results of water treatment efficiency. And the analyzed results for water temperature, residence time, and activities of microorganism, which can be the factors affect on water quality improvement, are as follows. 1) The removal rate variation of SS, BOD, and COD attendant on water temperature change is examined and it is known that the removal rate increases at $13^{\circ}C$ or above. 2) The removal rate of SS, BOD, and COD attendant on residence time is most active in the range of 0~18hr, 0~1.8hr, 0~2.7hr respectively, so it is found that the removal rate becomes smaller after 2.7hr. 3) From the examination of microorganism activity with the abundance of normal bacteria, it is found that the floating bacteria decrease as the flow distance from raw water inflow point of PILOT PLANT increases, and the adhesive bacteria have no concern with the flow distance. And it its known that the biomass of fine algae decreases as the flow distance from the raw water inflow point of PILOT PLANT increases from the examination with Chl-a.

• 상하수도학회지
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• 제18권1호
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• pp.37-48
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• 2004

The purpose of this study was to evaluate adaptability of external carbon source using GPS-X program in pilot plant composed with 2-stage denitrification process. The result from analysis of pilot plant operation and GPS-X simulation showed that effluent concentration could be simulated similarly by modifying operation conditions, such as DO concentration, C/N ratio and other calibrated parameter. In order to satisfy the standard of the effluent water quality on T-N of 20mg/L, it required approximately 3.1 of C/N ratio and 50% of nitrogen removal efficiency when influent T-N is 36.9mg/L. To maintain the stable water quality of the receiving water, the effluent T-N concentration should be less than 10-15mg/L and the appropriate C/N ratio to remove nitrogen was 4.27-6.82. The analysis of sensitivity to kinetic coefficient and reaction constant showed that $Y_H$ and ${\mu}_{mAUT}$ were most sensitive to nitrate and ammonia nitrogen, relatively and sensitivity coefficient of their were 1.32, 1.98. It was concluded that as $Y_H$ decreased and ${\mu}_{mAUT}$ increased, the reaction rates of denitrification and nitrification increased and the removal efficiencies of $NO_3{^-}-N$ and $NH_4{^+}-N$ improved.

• 한국토양비료학회지
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• 제45권4호
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• pp.642-648
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• 2012

주암호 상수원 상류지역인 죽산천에 위치한 죽산천 인공 습지의 수생태학적 특성을 평가하기 위해 수질에서의 영양 염류 처리효율, 수생식물의 무기성분 흡수량 및 퇴적물내 화학적 특성을 평가하였다. 수질에서의 영양염류 처리효율은 COD와 SS를 제외하고 전반적으로 낮았다. 죽산천 인공 습지의 주요 우점종의 영양염류 흡수량을 조사한 결과, T-N 및 T-P 흡수량은 8월에 노랑꽃창포 > 수련 > 노랑어리 연꽃 순으로 최대흡수량을 나타내었다. 퇴적물내 O.M 함량은 시기별로 큰 차이가 없었고, T-N 및 T-P의 함량은 봄에서 여름으로 시기가 변함에 따라 낮아져서 겨울까지 낮은 함량을 유지하였다. 퇴적물내 microbial biomass C:N:P의 비율은 봄, 여름, 가을 및 겨울이 각각 117~140:1~4:1, 86~126:5~6:1, 68~101:2~6:1 및 47~138:2~4:1로 나타났다. 죽산천 인공습지는 질소와 인의 처리효율이 낮고, 겨울철 수질 정화효율이 낮아 습지의 정화효율 향상을 위한 개선이 필요할 것으로 판단된다.