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ICV6 - CONFERENCE CAPACITY OF Vetiver GRASS IN TREATING A MIXTURE OF - PowerPoint PPT Presentation

ICV6 - CONFERENCE CAPACITY OF Vetiver GRASS IN TREATING A MIXTURE OF LABORATORY AND DOMESTIC WASTEWATERS Thao Minh Tran (1) ; Jean O. Lacoursire (2) ; Lena B. M. Vought (2) ; Phuong Thanh Doan (3) ; Man Van Tran (4) (1) Danang College of


  1. ICV6 - CONFERENCE CAPACITY OF Vetiver GRASS IN TREATING A MIXTURE OF LABORATORY AND DOMESTIC WASTEWATERS Thao Minh Tran (1) ; Jean O. LacoursiÌre (2) ; Lena B. M. Vought (2) ; Phuong Thanh Doan (3) ; Man Van Tran (4) (1) Danang College of Technology, Vietnam (2) Kristianstad University, Sweden (3) University of Education, Vietnam (4) Danang Department of Planning and Investment, Vietnam Thao ¡Tran ¡| ¡1 ¡

  2. PRESENTATION content 1-Introduction of research 2-Installation & feeding wastewater 3-Results and discussion 4-Conclusions & recommendations 5-Acknowledgements Thao ¡Tran ¡| ¡2 ¡

  3. INTRODUCTION OF RESEARCH - Constructed wetland: Low costs in investment and operation Vetiver - Vetiver grass: Multi-function Constructed wetland Heavy metals BOD HSSF vs fr DOMESTIC & LABORATORY WASTEWATER Odour, eutrophication Aromatic compounds Thao ¡Tran ¡| ¡3 ¡

  4. Installation & feeding wastewater Installation WASTEWATER 35 cm sa n d g r a v el (HSSF) WASTEWA TER 20 cm C UP FLO AT (FR) Thao ¡Tran ¡| ¡4 ¡

  5. Installation & feeding wastewater Constructed wetland systems at the beginning: HSS F FR Feeding wastewater Sampling point Thao ¡Tran ¡| ¡5 ¡

  6. Installation & feeding wastewater Feeding wastewater Value Parameter Dimension Mixture DW LW TAP WATER à 3 WEEKS pH - 6.2 5.5 6.0 ± 0.2 BOD mg.L -1 420 15 220 ± 12 TN mg.L -1 65 34 55 ± 3 TP mg.L -1 10 12 11 ± 2 DW:TAP WATER = 1:1 à 8 Cr +6 mg.L -1 ND 9.5 4.5 ± 0.4 WEEKS Fe 2+ mg.L -1 ND 38.5 19.8 ± 0.3 Mn 2+ mg.L -1 ND 47.0 24.2 ± 0.6 Cu 2+ mg.L -1 ND 35.1 17.6 ± 0.7 Benzene mg.L -1 ND 4.3 2.3 ± 0.4 DW:LW = 1:1 à 7 WEEKS Phenol mg.L -1 ND 7.8 3.8 ± 0.2 Thao ¡Tran ¡| ¡6 ¡

  7. Results & discussion After 8 weeks with DW & tap water After 7 weeks with DW & LW After 3 weeks with only tap water Thao ¡Tran ¡| ¡7 ¡

  8. Results & discussion 1 week ago Thao ¡Tran ¡| ¡8 ¡

  9. Results & discussion HSSF 1- Contaminants removals efficiencies of HSSF & FR; + BOD, N, P; + Heavy metals; + Aromatic compounds; FR 2-Microbial investigations Thao ¡Tran ¡| ¡9 ¡

  10. Removal performance of organics and nutrients 1 0 0 hssf: B O D 8 0 N 1- Diluted DW R e m o v a l ¡e ffic ie n c y , ¡ % P 6 0 2- Start LW 4 0 3-Acclimatized 2 0 0 0 3 6 9 1 2 1 5 O p e ra tio n ¡tim e , ¡ w Thao ¡Tran ¡| ¡10 ¡

  11. Removal performance of organics and nutrients 1 0 0 FR: F R -­‑B O D F R -­‑N 8 0 1- Diluted DW R e m o v a l ¡e ffic ie n c y , ¡% F R -­‑P 6 0 2- Start LW 4 0 3-Acclimatized 2 0 0 0 3 6 9 1 2 1 5 O p e ra tio n ¡tim e , ¡ w Thao ¡Tran ¡| ¡11 ¡

  12. Removal performance of Heavy metals & arom. Comp. 1 0 0 HSSF: 1-Acclimatization 8 0 R e m o v a l ¡e ffic ie n c y , ¡ % 2-Steady state 6 0 C r M n 4 0 96.8% F e 2 0 > 4 months C u 0 9 1 0 1 1 1 2 1 3 1 4 1 5 100% O p e ra tio n ¡tim e , ¡ w Thao ¡Tran ¡| ¡12 ¡

  13. Removal performance of Heavy metals & arom. Comp. 1 0 0 FR: C r 1-Acclimatization M n 8 0 R e m o v a l ¡e ffic ie n c y , ¡% F e C u 2-Steady state 6 0 4 0 91.5% 2 0 > 4 months 0 9 1 0 1 1 1 2 1 3 1 4 1 5 96.0% O p e ra tio n ¡tim e , ¡ w Thao ¡Tran ¡| ¡13 ¡

  14. Microbial behaviours HSSF: 2 0 l Azospirillum sp. (x 10 4 CFU/100 mL) 1 6 o Azotobacter sp. (x 10 4 CFU/100 mL) 1 2 Q u a n tity Δ Bacillus sp. (x 10 4 CFU/100 mL) 8 ¡ Pseudomonas sp. (x 10 8 CFU/100 mL) 4 ◊ Zoogloea sp. (x 10 7 CFU/100 mL) 0 0 3 6 9 1 2 1 5 O p e ra tio n ¡tim e , ¡ w Thao ¡Tran ¡| ¡14 ¡

  15. Microbial behaviours HSSF: 2 0 l Azospirillum sp. (x 10 4 CFU/100 mL) 1 6 o Azotobacter sp. R e m o v a l ¡e ffic ie n c y , ¡% (x 10 4 CFU/100 mL) 1 2 Δ Bacillus sp. (x 10 4 CFU/100 mL) 8 ¡ Pseudomonas sp. (x 10 8 CFU/100 mL) 4 ◊ Zoogloea sp. (x 10 7 CFU/100 mL) 0 0 3 6 9 1 2 1 5 O p e ra tio n ¡tim e , ¡ w Thao ¡Tran ¡| ¡15 ¡

  16. Conclusions & recommendations - HSSF: + HM and AC: slight effect on N removal + HM and AC: significant effect on P removal - FR: + HM and AC: slight effect on P removal + HM and AC: significant effect on N removal - Addition of LW: BOD and nutrient removal performances are improved - Azospirillum , Azotobacter and Bacillus sp.: affected by LW - Pseudomonas and Zoogloea sp.: free of influence - HSSF >< FR: Little difference in performance à Larger scale for domestic & laboratory wastewater treatment Thao ¡Tran ¡| ¡16 ¡

  17. Thank you for attention Thao ¡Tran ¡| ¡17 ¡

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