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Low Concentrated Nitrogen-Phosphate Removal of 4 Strains of Marine Bacteria Applied to Ceramic Media (세라믹 담체에 적용된 해양박테리아 4종의 저농도 질소-인 제거)

  • Lee, Gunsup;Kim, SoJung;Chung, Youngjae;Kim, Dongguin;Lee, Sang-Seob;Auh, Chung-Kyoon;Lee, Taek-Kyun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.10
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    • pp.4910-4916
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    • 2012
  • Changes of low concentrated nitrogen-phosphate removal efficiency were investigated in 4 strains of marine bacteria applied to ceramic media. Marine bacteria were isolated and identified from Gwangyang bay. Growth rates and removal efficiencies of $NH_3$-N of 4 strains of marine bacteria applied to ceramic media were increased approximately 3 fold and over 30% than control group, respectively. A. hydrophila and P. diminuta had highest ${NO_3}^-$-N and phosphate removal efficiencies, respectively. This results showed that ceramic media is very nice material for improvement of nitrogen-phosphate removal efficiency and isolated marine bacteria may be useful to control nitrogen-phosphate at low concentration in field.

Effect of Metal Ion on the Bentonite Modified with Cationic Surfactant (양이온성 계면활성제를 이용한 유기 벤토나이트의 합성시 금속 이온의 첨가 영향)

  • Kim, Soo-Hong;Park, Jae-Woo
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.26 no.6B
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    • pp.677-682
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    • 2006
  • Dodecyldimethylethylammonium (DDDEA), a cationic surfactant, and aluminum metal ions were used with bentonite to synthesize to synthesize an improved organo bentonite. Among three different synthesis procedure for organo bentonites, aluminium-pillared bentonite showed the highest DDDEA sorption, which indicated that aluminium-pillared organo bentonite would exhibit the highest sorption capacity for organic contaminants. Aluminium pillared organo bentonite also showed a high sorption capability for phosphorus, while it did not exhibit strong sorption for nitrate. In the meantime, more desorption was observed with aluminium-pillared organo bentonite than ordinary organo bentonites.

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Removal Effect of Nitrogen and Phosphorus of Acorus cazamus var. angustatus oil Its Growth Stage and Water-storage Time (생장단계와 체류시간에 따른 창포의 질소와 인 제거효과)

  • Seo Byung-Soo;Park Chong-Min
    • Korean Journal of Environment and Ecology
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    • v.19 no.1
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    • pp.1-8
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    • 2005
  • The removal affect of nitrogen and phosphorus were analyzed using a Acorus calamus var. angustatus. The nutrient concentration, growth stage of plants and the storage time of polluted water were considered. The results of this study were as follows: after an hour the content of nitrogen and phosphorus were considerably reduced in the Acorus calamus var. angustatus, while after two-four hours the rate of reduction was extremely low. This situation was the same in the early growth stage, growing stage and highest growth stage of the plant. The removal rate of nitrogen and phosphorus with the Acorus calamus var. angustatus was higher, when these two minerals remained in high levels of water. The Acorus calamus var. angustatus was more effective to remove nitrogen than that of phosphorus. The plant removed the most nitrogen and phosphorus when in the highest growth stage, but this was not clear in the growth stages. The removal rate was higher, in the case of moving polluted water to other plants after two days, than in the case of four days of growth in the same plants.

Phosphate Removal Using Recombinant Bacteria with Cytoplasmic Phosphate Binding Protein (Phosphate Binding Protein이 세포질에 발현된 재조합 박테리아를 이용한 인 제거)

  • Choi, Suk Soon;Ha, Jeong Hyub;Cha, Hyung Joon
    • Applied Chemistry for Engineering
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    • v.24 no.5
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    • pp.558-561
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    • 2013
  • In the present work, we constructed a recombinant Escherichia coli with cytoplasmic-expressed phosphate-binding protein (PBP) and investigated its phosphate removal in water phase. When the recombinant bacteria were cultured for 6 h to treat phosphate, the removal efficiencies were 90, 49, and 41% for the treatment of 1.0, 1.5, and 2.0 mg/L phosphate, respectively, indicating good specific phosphate removal of our developed system. Also, cell densities of 2.5 and 5.0 Optical density resulted in high phosphate removal efficiencies and ~80% of 2.0 mg/L phosphate was efficiently removed. A novel biotechnology developed in this study could be effectively employed for resolving eutrophication problem in water body.

Characteristics of Biological Phosphorus Removal in the MBR (MBR 공정에서의 인 제거 특성)

  • Choi, Hee-Jeong;Lee, Seung-Mok
    • Journal of Korean Society of Environmental Engineers
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    • v.29 no.2
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    • pp.197-204
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    • 2007
  • The reciprocal effects towards the enhanced biological phosphorus removal were performed for anaerobic, aerobic and anoxic phases. The batch experiments showed that the p-absorption in the anoxic phase was 50% lower than aerobic phase. The correlation coefficient between p-back-solution and p-absorption was found to be $R^2=0.557$ however, the coefficient b(b = 8.4049) was relatively higher than the other researchers results. The increase and/or acceptance of the $K^+-,\;Mg^{2+}-$ and $NH_4-N$-concentration was proportional to those of the $PO_4-P$-concentration in the batch test. The relationship between $K^+-,\;Mg^{2+}$ and $PO_4-P$ was determined. The average value of this relation-ship agreed with 0.2 mol $K^+Ion$ / mol $PO_4-P$ ion and 0.21 mol $Mg^{2+}Ion$ / moi $PO_4-P$ ion in the anaerobic phase. The absorbed ratio of $K^+$ to $Mg^{2+}$ over $PO_4-P$ was found to be 1 : 5.

Effect of TiCl4 Concentration and Mixing Intensity on Phosphorus Removal in Synthetic Wastewater (TiCl4 농도와 교반강도가 수중 인 제거에 미치는 영향)

  • Seo, Wan-Woo;Lee, Bong-Hee;Park, Hwa-Soo;Kim, Jong-Ho;Ahn, Johng-Hwa
    • Journal of Korean Society of Environmental Engineers
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    • v.38 no.3
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    • pp.150-153
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    • 2016
  • This study evaluates the efficacy of titanium tetrachloride ($TiCl_4$) on phosphorus (P) removal in synthetic wastewater. Jar test experiments were performed at various $TiCl_4$ concentration (0.25-0.59 mM), and intensities of slow (30-60 rpm) and rapid (100-250 rpm) mixings to determine the conditions at which P removal was most efficient. The P-removal efficiency was highest (about 99%) at $TiCl_4$ concentration $([TiCl_4])=0.39mM$ with rapid-mixing intensity=100 rpm and slow-mixing intensity=30 rpm. The slow-mixing intensity was more sensitive than the rapid-mixing intensity to the P removal efficiency when [$TiCl_4$] was low ($0.25{\leq}[TiCl_4]{\leq}0.27mM$).

Phosphorus Removal from Municipal Wastewater Using Ti-based Coagulants (티타늄계열응집제를 이용한 하수 내 인 제거)

  • Shin, So-Yeon;Kim, Jong-Ho;Ahn, Johng-Hwa
    • Journal of Korean Society of Environmental Engineers
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    • v.38 no.8
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    • pp.428-434
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    • 2016
  • This study evaluated the efficacy of Ti-based coagulants on phosphorus (P) removal from municipal wastewater and compared them with Al-based coagulants. Jar test experiments were performed at various chemical doses and OH/Ti molar ratio (B value). The higher the intial phosphate ($PO_4-P$) concentration, the lower the [Ti]/[P] to reach a residual concentration below 0.2 mg P/L. Removal efficiencies of total phosphorus increased with an increased coagulant dose but decreased after the efficiencies reached their maximum value regardless of coagulant or B value. On the other hand, $PO_4-P$ removal showed an increasing trend with an increased coagulant dose, reaching the plateau value under large coagulant dose conditions for both Ti- and Al-based coagulants regardless of B value. The chemical dose of Ti-based coagulants was approximately twice higher than that of Al-based coagulants with the same P-removal efficiency. The coagulation efficiency was influenced by different B values.