• 제목/요약/키워드: leachate

검색결과 808건 처리시간 0.022초

다공성 Media가 조여된 반응조를 이용한 매립지 침출수의 호기성 생물학적 처리시 미소생물상의 특성 (Characteristics of Microfauna in Biological Treatment of Landfil Leachate with Reactor Including Porous Media)

  • 홍성철;박연규
    • 한국환경과학회지
    • /
    • 제5권1호
    • /
    • pp.61-69
    • /
    • 1996
  • The combined wastewater of municipal landfill leachate and municipal sewage was treated using several sets of bench-scale aerated circulating system including porous media. Investigated items in this experiment were the dominant protozoa and metazoa in this system, the variation of microfauna relationship between operating condition and dominant genera. Also considered the factors determining dominant genera and their role. The outcome of this research is as follows; 1. Aspidisca, Vorticella, Truhellophyllum, Lecane, Philodina, Cyclops were mainly appeared prior to combinding leachate, while Trachelocerca, Bodo, Glaucoma were the dominant genera after combinding leachate. 2. As to metazoa, Nematode and Philodina were not influenced by 5oA leachate mixing ratio, meanwhile Crustacea has high sensitivity for increased leachate mixing ratio and it was not appeared in 5% leachate mixing ratio. 3. The appropriate treatability could'nt be expected at the above 10% leachate mixing ratio. Especially, in the condition of 20% leachate mixing ratio, all of the microfauna were affected damage seriously on their existence. Meanwhile hydraulic retention time, substrate loading rate and slut자e production rate didn't give notable influence on increasing the number of microfauna. 4. As to protozoa, saprozoic and holozoic species were appeared commonly and polysaprobic species were dominent. 5. Filamentous organsms were nearly not affected by leachate mixing. It seems that they could live without any trouble at the 10% leachate mixing ratio, if the substrate is sufficient. 6. Diversity of microfauna had a reducing trernd as the sewage was mixed with leachate.

  • PDF

생물학적 방법에 의한 도시생활폐기물 매립지의 침출수 독성특성 평가 (Biological Evaluation for Characteristics of Leachate Toxicity from Municipal Solid Waste Landfill)

  • 황인영;류경무
    • Environmental Analysis Health and Toxicology
    • /
    • 제11권1_2호
    • /
    • pp.31-39
    • /
    • 1996
  • Leachate from municipal solid waste (MSW) landfill, effluent from leachate treatment plant, and ground water sample from a monitoring well near landfill site were tested for an acute toxicity. Microtox toxicity test was used for testing the acute toxicity of leachate and other samples. EC$_{50}$ values which a concentration of pollutant for reducing 50% light output from luminescent bacteria, Photobacterium phosphoreum were determined to assess the toxicity of pollutants as well as the relative toxicity. In addition, characteristics of leachate were studied and compared to those of phenol and pentachlorophenol (PCP) which are typical aquatic toxic pollutants. For leachate, EC$_{50}$ for 30 min incubation was 10.8%, while for phenol and PCP, 46 ppm and 1.2 ppm, respectively. the relative toxicity of treated leachate by in situ aeration with activated sludge was reduced to more than 75% of toxicity of the untreated leachate. Microtox toxicity test was failed to figure out EC$_{50}$ values for groundwater from a monitoring well since the relative toxicity of the unconcentrated sample was too low to estimate EC$_{50}$. Addition of activated carbon to leachate was reduced the relative toxicity. The reduction Pattern of the relative toxicity of leachate by mechanical aeration was similar to that of PCP, but different from that of phenol. These findings suggest that the toxicity of leachate may come from PCP-like toxic compounds rather than phenol-like one. In conclusion, the process of aeration with activated sludge might be very important to reduce the environmental toxicity of leachate. And Microtox test could be a reasonable bioassay for screening and monitoring the environmental toxicity of leachate from municipal solid waste landfill as well as for determining the reduction efficiency of the leachate toxicity by various treatment processes in leachate treatment plant.

  • PDF

The Effects of Waste Leachate on the Eco-Physiological Characteristics of Populus euramericana

  • Woo, Su-Young
    • The Korean Journal of Ecology
    • /
    • 제22권6호
    • /
    • pp.343-348
    • /
    • 1999
  • Populus euramericana has been identified as a possible species for use for phytoremediation of landfills. To identify the effects of waste leachate on the growth and physiological characteristics of Populus euramericana. four different treatments were applied to Populus euramericana seedlings: leachate solution (100% leachate). 25% dilution (75% leachate: 25% water. v/v), 50% dilution (50% leachate: 50% water. v/v) and control (100% tab water) were applied to Populus euramericana. Treatment with waste leachate significantly stimulated Populus euramericana height. diameter at root collar and biomass production relative to the water control. Chlorophyll contents. photosynthesis and transpiration of leachate irrigated-trees were significantly higher than those of water control. These results suggested that poplar could be a suitable species for phytoremediation in landfills because these species showed good growth performance and were capable of taking up waste leachate.

  • PDF

도시폐기물 매립지 침출수의 적정처리에 관한 연구 -난지도 폐기물 매립지 침출수를 대상으로- (A Study on the Adequate Treatment of Municipal Landfill Leachate -A Case Study of Nanjido Landfill Leachate-)

  • 이병인
    • 한국환경과학회지
    • /
    • 제4권3호
    • /
    • pp.269-276
    • /
    • 1995
  • An experimental research was conducted in order to study the treatability of municipal landfill leachate using a combined physio-chemical and biological treatment. The leachate was obtained from Nanjido landfill site in Seoul. Several sets of bench-scale sequencing batch reactor(SBR) and physic-chemical reactors were used as experimental apparatus. This experiment lasted for about 2 years. The results are as follows: 1. The characteristics of Nanjido landfill leachate were pH 7.4~8.2, BOD 79~450mg/L, COD 998~1460mg/L, $NH_3-N$ 1380~3412mg/L, 7-P 2.6~7.0mg/L, color 890~1992 unit, and heavy metals are a very small amount. 2. Either physio-chemical or biological treatment of Landfill leachate alone did not work well. So for the adequate treatment of leachate, it was necessary to deal with the physio-chemical pretreatment before biological treatment. And it was found that both electrolysis and ozone treatment are better pretreatments of leachate than others. 3. In this study, landfill leachate was effectively processed by two step : first by electrolysis pretreatment, and secondly by SBR treatment. Thus, the study showed considerable substrate removal of raw leachate, even though the rate of COD removal depended on HRT.

  • PDF

도시폐기물 매립지 침출수의 적정처리에 관한 연구 -난지도 폐기물 매립지 침출수를 대상으로- (A Study on the Adequate Treatment of Municipal Landfill Leachate -A Case Study of Nanjido Landfill Leachate-)

  • 이병인
    • 한국환경과학회지
    • /
    • 제4권3호
    • /
    • pp.117-117
    • /
    • 1995
  • An experimental research was conducted in order to study the treatability of municipal landfill leachate using a combined physio-chemical and biological treatment. The leachate was obtained from Nanjido landfill site in Seoul. Several sets of bench-scale sequencing batch reactor(SBR) and physic-chemical reactors were used as experimental apparatus. This experiment lasted for about 2 years. The results are as follows: 1. The characteristics of Nanjido landfill leachate were pH 7.4~8.2, BOD 79~450mg/L, COD 998~1460mg/L, $NH_3-N$ 1380~3412mg/L, 7-P 2.6~7.0mg/L, color 890~1992 unit, and heavy metals are a very small amount. 2. Either physio-chemical or biological treatment of Landfill leachate alone did not work well. So for the adequate treatment of leachate, it was necessary to deal with the physio-chemical pretreatment before biological treatment. And it was found that both electrolysis and ozone treatment are better pretreatments of leachate than others. 3. In this study, landfill leachate was effectively processed by two step : first by electrolysis pretreatment, and secondly by SBR treatment. Thus, the study showed considerable substrate removal of raw leachate, even though the rate of COD removal depended on HRT.

대청호 상류유역 매립지의 침출수 분석 및 평가 (Assessment of Leachate from Solid Waste Landfills in Daechong Lake Upper Drainage Basin)

  • 홍상표
    • 환경영향평가
    • /
    • 제12권3호
    • /
    • pp.161-170
    • /
    • 2003
  • To investigate the characteristics of 17 solid waste landfills in the upper drainage basin of Lake Daechong, the landfill sites were surveyed, the leachate of these landfills were analyzed, and the analysis results were assessed from standpoint of water contamination. Sanitary landfills which are now being operated are relatively well equipped with facilities such as leachate collection, daily soil cover and landfill gas treatment devices. But a few of open-dumping landfills were leaking leachate apparently and were supervised improperly and neglectfully by local governments. Some of sanitary landfills exceeded the COD permission criteria of leachate effluent, and some of open-dumping landfills exceeded SS, T-P, Pb, As, Fe, Mn permission criteria of leachate effluent. To improve the water quality of Lake Daechong which is utilized for supplying drinking water, agricultural water, and industrial water to the great part of Chungchong area, the adequate and prompt measures for preventing Daechong Lake water contamination from landfills leachate is necessary.

산성폐광폐수를 이용한 매립지 침출수의 응집처리 (Coagulation Treatment of Landfill Leachate Using Acid Mine Drainage(AMD))

  • 최봉종;이승목;이상호
    • 한국환경보건학회지
    • /
    • 제26권4호
    • /
    • pp.129-133
    • /
    • 2000
  • The objective of this study was to invetigate the coagulation effects of landfill leachate by using Acid Mine Drainage(AND). The coagulation efficiency was investigated by mixing landfill leachate with F $e^{+3}$ solution earned by oxidation of pyrite(AMD). In the results of this experiment, it was found that the amount of removed COD and SS was approximately 30% respectively by mixing at the ratio of AMD three to leachate one. And it showed highest turbidity removal efficiency at all mixing ratio. Concentration of Fe was decreased with increasing mixing ratio, however it was increased inversely at mixing ratio 4. Optimal mixing ratio was 3 at the results obtained by leachate coagulation experiments. Also removal efficiency at mixing ratio 3 corresponded to 500mg/$\ell$ of FeC $l_3$ dosage. it was suggested that pretreatment by mixing of AMD and leachate remove both suspended organic material of leachate and metal of AMD.

  • PDF

매립지 침출수가 도시하수처리에 미치는 영향 (Effects of Landfill Leachate on the Treatment of Municipal Wastewater)

  • 장지희;김영관
    • 상하수도학회지
    • /
    • 제10권2호
    • /
    • pp.117-123
    • /
    • 1996
  • A bench-scale continuous activated sludge system was operated in order to study the effects of solid waste landfill leachate on municipal wastewater treatment. The leachate sample was collected from Nanjido landfill. During the 7 weeks of operational period, the leachate content in the influent fed to the system was increased stepwise from 3% to 5% and 7%. The solids retention time was the major process control parameter, and it was 10 days. With the municipal wastewater alone, COD removal was 75%. The removal percents, however, decreased to 60% and 45% when the leachate content was 3% and 7%, respectively. For the wastewater spiked with the leachate, the sludge production was higher than for the municipal wastewater alone. Sludge settleability determined by SVI deteriorated with the increase of leachate content. The specific oxygen uptake rate, however, was measured higher as leachate content increased.

  • PDF

목편살수여상 침출액비와 어분, 골분, 게껍질 혼합액을 이용한 상추의 수경재배 (Hydroponic Culture of Leaf Lettuce Using Mixtures of Fish Meal, Bone Meal, Crab Shell and the Pig Slurry Leachate of Woodchip Trickling Filter)

  • 류종원
    • 한국축산시설환경학회지
    • /
    • 제16권3호
    • /
    • pp.215-226
    • /
    • 2010
  • 본 연구는 목편살수여상 pilot 장치를 설치하여 스크레파 축사에서 배출되는 뇨오수를 원수로 사용하여 가동한 후 침출액비를 공시재료로 하여 상추 양액재배 시험을 실시하였다. 처리구는 침출액비 (SL) 단독처리구, 침출 액비+어분 (SL+FM), 침출액비+골분 (SL+BM), 침출액비+게껍질 (SL+CS) 혼합처리구. 침출 액비+부산물 (SL+FM+BM+CS) 혼합처리구, 대조구로 원예연 상추양액 (NS) 처리구 등 6개 처리구를 두었다. 침출액비와 부산물 혼합처리 후 전기전도도와 pH를 조정하여 상추의 양액재배를 실시한 결과를 요약하면 다음과 같다. 1. 목편살수여상 처리 과정중 pH는 처리 시작전 7.3에서 처리 후 8.5로 상승하였다. 전기전도도 (EC)는 처리전 17.05 mS/cm에서 처리 후 30일에는 9.7 mS/cm로 낮아졌다. 2. 침출액비는 부유물질 (SS)이 낮아 수경 재배시 관배수의 막힘문제 없이 활용이 가능하였다. 침출액비는 양분조성에서 칼륨함량이 높고 인산 함량이 낮았다. 3. 침출액비시용구 (SL)의 상추수량은 원예 연 표준양액재배 대비 75%를 나타내어 25% 수량저하를 나타내었다. 침출액비을 어분. 골분. 게껍질을 혼합한 처리구는 대조구 대비 85%. 79%. 80% 수량을 나타내어 어분의 첨가 효과가 가장 높았다. 침출액비와 어분 혼합액은 침출액비 단독처리구 보다 10% 증수를 나타내어 유기양액의 대체 원료로 사용이 가능 할 것으로 보인다.

Evaluation of Leachate Replacement Effect on Solid State Anaerobic Digestion of Dairy Manure and Sawdust Bedding Mixtures

  • Jo, Hyeonsoo;Lee, Seunghun;Kim, Eunjong;Ahn, Heekwon
    • 한국토양비료학회지
    • /
    • 제50권4호
    • /
    • pp.293-305
    • /
    • 2017
  • This experiment was conducted to evaluate the effect of leachate replacement frequency on solid state anaerobic digestion (SSAD) of dairy manure using 22 L volume lab-scale digesters at mesophilic temperature ($37^{\circ}C$) in batch mode. Three different leachate replacement strategies (no replacement, once every three days, and once every nine days) were applied and three digesters per each treatment were operated for 45 days. Results showed that leachate replacement test unit every nine days resulted in 1.6 times more methane production ($53.8N{\cdot}mL\;g^{-1}{\cdot}VS$) from SSAD compared to test unit every three days ($34.0N{\cdot}mL\;g^{-1}{\cdot}VS$). No leachate replacement strategy applied group showed slightly higher methane production ($56.3N{\cdot}mL\;g^{-1}{\cdot}VS$) than every nine days replaced one. When added the methane production potential of replaced leachate itself to the methane produced from digester, leachate replacement every nine days resulted in quite similar methane production ($56.5N{\cdot}mL\;g^{-1}{\cdot}VS$) to no leachate replacement group. Even though methane production potential of replaced leachate itself added to the methane produced from digester, every three days replacement showed only $34N{\cdot}mL$ methane production per gram of volatile solids. These results suggest that farmers do not need to replace leachate during SSAD of dairy manure and sawdust mixture in order to maximize methane production. If there are any concerns with accumulation of inhibiting substances in the digester, the 9-day cycle leachate replacement is appropriate.