• Title/Summary/Keyword: Phosphorus Removal

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Evaluation for Interactive Toxic Effects of Binary Heavy Metals on Bacterial Growth and Phosphorus Removal under Co-Culture Condition of Alcaligenes sp. and Pseudomonas sp. (Alcaligenes sp.와 Pseudomonas sp.의 공동배양 조건에서 박테리아 생장 및 인 제거에 미치는 두 종 중금속의 상호적인 독성효과 평가)

  • Kim, Deok-Hyun;Park, Sang-Wook;Kim, Deok-Won;Park, Ji-Su;Oh, Eun-Ji;Yoo, Jin;Chung, Keun-Yook
    • Applied Chemistry for Engineering
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    • v.31 no.6
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    • pp.612-623
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    • 2020
  • This study was initiated to quantitatively evaluate the inhibitory effects of five heavy metals (Cd, Cu, Zn, Pb, Ni) on bacterial growth and phosphorus removal in the binary culture of Alcaligenes sp. plus Pseudomonas sp. IC50 values of Alcaligenes sp. plus Pseudomonas sp. for Cd, Cu, Zn, Pb, and Ni were 0.75, 10.93, 7.08, 13.30, and 15.78 mg/L, respectively. For the binary treatments of heavy metals, IC50 was the lowest in the treatment of Cd + Cu, whereas, it was the highest in the Ni + Pb treatment. The EC50 values for Cd, Cu, Zn, Pb, and Ni were 0.54, 11.08, 6.14, 9.33, and 13.81 mg/L, respectively. For the binary treatments of heavy metals, EC50 was the lowest in the Cd + Zn, whereas, the highest in the Zn + Ni. Based on both IC50 and EC50 values for the binary culture of bacteria with the binary mixtures of heavy metals, the most interactive effect was found to be antagonistic, though the only synergistic effect was found in Cu + Ni treatment. Therefore, our results can provide basic data on the toxic effects of heavy metals on the bacterial growth and phosphorus removal in the wastewater treatment process.

Phosphorus Removal from Advanced Wastewater Treatment Process Using PAC (PAC를 이용한 하수의 고도처리공정에서의 인 제거)

  • Park, Wan-Cheol;Lee, Mi-Ae;Sung, Il-Wha
    • Journal of Korean Society of Environmental Engineers
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    • v.36 no.2
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    • pp.96-102
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    • 2014
  • To meet the reinforced discharge standards, effect of coagulant PAC (Poly aluminium chloride, 10.4% as $Al_2O_3$) on phosphorous removal in advanced wastewater treatment process (a modified $A^2$/O). 15 mg/L of PAC determined by jar-test was added to influent of settling basin in a modified $A^2$/O consists of anaerobic, anoxic, and oxic chamber which contains Bio-clod and porous polyurethane media. Performance of PAC was tested by supernatant after settling. The removal efficiencies of BOD, COD, TP (total phosphorus) and SP (soluble phosphorus) on biological process with PAC were 96.1%, 88.8%, 97.0% and 98.6%, compared with those on biological process without PAC were 95.4%, 72.4%, 71.6% and 59.5% respectively. 18.4% of TP and 39.1% of SP removal efficiency was increased, although increase of BOD and COD removal rate was not significant. Only PAC addition to influent of settling basin in $A^2O$ process can help total phosphorus removal to 0.13 mg/L with following discharge standard.

Phosphorus Removal Characteristic of the Aluminum (III)-loess Composite (알루미늄-황토 복합체의 인 제거 특성)

  • Shin, Gwan-Woo;Kim, Jin-Sik;Kim, Keum-Yong;Lee, Sang-Ill
    • Journal of Korean Society of Environmental Engineers
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    • v.33 no.7
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    • pp.530-535
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    • 2011
  • In this work, the adsorption characteristic of the composites by adding loess with aluminum ("Al-loess") and Loess with lanthanum ("La-loess") which have been developed to effectively remove phosphorus, the substance which causes the eutrophic lake has been evaluated. According to the result of the work, as the amount of aluminum or lanthanum put in 1g of loess increases, the combined amount also increases accordingly. When the loess with no aluminum or lanthanum attached was used, the rate of removing phosphorus was different in comparison with the case of using the composites of 0.5, 1 and 2 mg of aluminum and 0.5, 1 and 3 mg of lanthanum in each gram of loess. It was observed the amount required to remove 1 mg $PO_4^{3-}$-P/L of phosphorus completely is approximately 2 to 10 times less for the composite of Al-loess than loess alone. Also, in case of the composite of La-loess, the amount was decreased by about 1.5 to 10 times. In order to observe the rate of adsorption phosphorus with Al-loess and La-loess, the composites were used for the observation up to three times by water washing. As a result, the water washing of the composite did not affect phosphorus removal. According to the effect of pH, there is a high rate of removing phosphorus in the pH range of 5~8. It seems that the developed composite will effectively remove phosphorus when it is spread in the natural water system. Also, since Al-loess and La-loess composites are rapidly precipitated within 30 minutes, it is stabilized quickly at the bottom of the eutrophic lake and becomes responsible for the removal of phosphorus in water and eluted from the water and the sedimentary layer.

The Nitrogen and Phosphorus Removal of MUNR Process Using Sludge Carbon Source (초음파처리 슬러지 탄소원을 첨가한 침지헝 분리막공법의 질소, 인 처리에 관한 연구)

  • 김영규;황성희
    • Journal of Environmental Health Sciences
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    • v.28 no.5
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    • pp.1-3
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    • 2002
  • This study was to evaluate on the removal efficiencies of total nitrogen and phosphorus in municipal wastewater at MUNR process using sludge carbon source for environmental micro-organism. The removal efficiencies of total suspended solid were 85.9~91%, total nitrogen were 38.6~87.2% and total phosphorus were 30.8~39.0%, respectively. It was shown that removal efficiency of nitrogen was effectively influenced by sludge carbon source treated with ultrasonication. The removal efficiency of total phosphorus was low because the sludge was not wasted during this treatment.

Removal of Inorganic Nitrogen and Phosphorus from Cow s Liquid Manure by Batch Algal Culture

  • KIM, MAM-SOO;MOO-YOUNG PACK
    • Journal of Microbiology and Biotechnology
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    • v.3 no.3
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    • pp.214-216
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    • 1993
  • Cow's liquid manure (CLM), an animal waste, was treated by a batch algal culture to remove inorganic nutrients. CLM used in this study was especially high in concentrations of inorganic nitrogen and phosphorus. The optimum dilution ratio of the CLM for maximum algal growth was 1:25. Ninety five percent of inorganic nitrogen and 100% of inorganic phosphorus were removed from the CLM with a dilution ratio of 1:25.

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The Nitrogen and Phosphorus Removal of UNR Process Using Sludge Carbon Source (슬러지 탄소원을 주입한 UNR공정의 동절기 질소, 인 처리효율)

  • Kim Young Gyu;Kim In Bae
    • Journal of Environmental Health Sciences
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    • v.28 no.1
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    • pp.93-97
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    • 2002
  • The aim of this study was to evaluate on the removal effect of total nitrogen and phosphorus with municipal wastewater in ultrasonic nutrient removal (UNR) process using ultrasonic sludge carbon source. The removal efficiency for total nitrogen was 44.2% at biological nutrient removal (BNR) process, 50.8% at UNR process. The removal efficiency for total phosphorus was 45.6% at BNR process, 46.2% at UNR process. The removal of nitrogen was effectively influenced by ultrasonic sludge carbon source.

Development on the Process for Nitrogen and Phosphorus Removal in Municipal Wastewater Treatment System

  • Kim, Young-Gyu
    • Proceedings of the Korean Environmental Health Society Conference
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    • 2003.06a
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    • pp.144-146
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    • 2003
  • The removal effect of total nitrogen in municipal wastewater by decreasing hydraulic retention time(HRT) from 6 hour to 4 hour on MNR process was not decreased.. The removal efficiencies of nutrient removal process combining A2/O process with media for T-N were 63.1% in the reactor operated 6 hour, and 73.5% in the reactor operated 5 hour and 77.0% in the reactor operated 4 hour.

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