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Defluoridation of drinking water using low cost bioadsorbents

defluoridation by bio-adsorbents-Moringa olefera (MO),Rice Husk Activated Charcol(RHAC),Vertiver...

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Defluoridation of drinking water using low cost bioadsorbents

  1. 1. TOPIC DESIGN AND FABRICATION OF COMPACT HOUSEHOLD WATER TREATMENT SYSTEM FOR FLUORIDE REMOVAL TEAM MEMBERS Dayal Kurian Varghese Anandu Aravind Arshik K Meera S Prasad 1
  2. 2. OBJECTIVES  To identify fluoride affected areas in Kerala. Collection and analysis of water samples To evaluate the effectiveness of bio-adsorbents for the removal of fluoride .  To fabricate a compact household water treatment system 2
  3. 3. DATA COLLECTION  As per National Rural Drinking Water Programme(NRDWP), Fluoride concentration in water is more in Alapuzha and Palakkadu  Sociol survey is conducted in Panchayat Ambalapuzha(N), Ambalapuzha(S),and Purakkad 19% 33% 48% Fluride in drinking water(%) Purakkadu Ambalapuzha(N) Ambalapuzha(S) Base on colour of water Panchayath Fluride(%) Purakkadu 40 Ambalapuzha(N) 69.23 Ambalapuzha(S) 100 31
  4. 4. SAMPLE COLLECTION AND ANALYSIS Samples were collected from different places of Ambalapuzha. PARAMETER SAMPLE 1 Mg/l SAMPLE 2 Mg/l SAMPLE 3 Mg/l SAMPLE 4 Mg/l PERMISSIBLE LIMIT mg/l PH 6.56 6.58 6.55 6.95 6.5-8.5 FLUORIDE 1.3 1.57 1.7 2.75 1.5 HARDNESS 160 120 170 250 500 TURBIDITY 8 7 6 9 10 CHLORIDE 27.5 25 50 270 250 TOTAL SOLIDS 300 270 320 350 500 41
  5. 5. FABRICATED MODEL 5
  6. 6. SAMPLE NO. DEPTH OF ADSORBENT BED cm CONTACT TIME minutes INITIAL FLUORIDE CONC. Mg/l FINAL FLUORIDE CONC. Mg/l FLUORIDE REMOVAL EFFICIENCY % 1 3 30 10 0.26 97.4 2 3 60 10 0.41 95.9 3 3 120 10 0.65 93.5 4 4 30 10 0.19 98.1 5 4 60 10 0.35 96.5 6 4 120 10 0.64 93.6 7 5 30 10 0.17 98.3 8 5 60 10 0.33 96.7 9 5 120 10 0.62 93.8 93 94 95 96 97 98 99 0 50 100 150 BED DEPTH 3 cm BED DEPTH 4 cm BED DEPTH 5 cm FLUORIDEREMOVALEFFICIENCY (%) STUDIES ON MORINGA OLEIFERA(MO) SEED POWDER Moringa oleifera seeds Moringa oleifera de-husked seed kernels Moringa oleifera seed powder 6
  7. 7. SAMPLE NO. DEPTH OF ADSORBET BED cm CONTACT TIME minutes INITIAL FLUORIDE CONC. Mg/l FINAL FLUORID E CONC. Mg/l FLUORIDE REMOVAL EFFICIENCY % 1 3 30 10 1.2 88.0 2 3 60 10 1.28 87.2 3 3 120 10 1.34 86.6 4 4 30 10 1.23 87.7 5 4 60 10 1.35 86.5 6 4 120 10 1.39 86.1 7 5 30 10 1.12 88.8 8 5 60 10 1.22 87.8 9 5 120 10 1.30 87.0 85.5 86 86.5 87 87.5 88 88.5 89 0 50 100 150 BED DEPTH 3 cm BED DEPTH 4 cm BED DEPTH 5 cm FLUORIDEREMOVAL EFFICIENCY(%) STUDIES ON RICE HUSK ACTIVATED CHARCOAL(RHAC) RICE HUSK (BEFORE ACTIVATION) RICE HUSK ACTIVATED CHARCOAL 7
  8. 8. SAMPLE NO. DEPTH OF ADSORBENT BED cm CONTACT TIME minutes INITIAL FLUORIDE CONC. Mg/l FINAL FLUORIDE CONC. Mg/l FLUORIDE REMOVAL EFFICIENCY % 1 3 30 10 3.6 64 2 3 60 10 4.23 57.7 3 3 120 10 4.36 56.4 4 4 30 10 3.25 67.5 5 4 60 10 4.00 60 6 4 120 10 4.30 57 7 5 30 10 3.54 64.6 8 5 60 10 4.2 58 9 5 120 10 4.4 56 0 10 20 30 40 50 60 70 80 0 50 100 150 BED DEPTH 3 cm BED DEPTH 4 cm BED DEPTH 5 cm FLUORIDE REMOVAL EFFICIENCY Vs TIME TIME (MINUTES) FLUORIDEREMOVALEFFICIENCY(%) COMPARISON OF REMOVAL EFFICIENCIES OF ADSORBENTS 0 20 40 60 80 100 120 0 50 100 150 VETIVER MO RHA FLUORIDEREMOVAL EFFICIENCY(%) STUDIES ON ACTIVATED VETIVER ROOT VETIVER ROOT 81
  9. 9. SAMPLE NO. CONTACT TIME minutes INITIAL Fl CONC. Mg/l FINAL Fl CONC. Mg/l Fl REMOVAL EFFICIENCY % 1 10 10 3.6 64 2 20 10 3.45 65.5 3 30 10 2.75 72.5 4 40 10 3.3 67 5 50 10 3.65 63.5 STUDIES ON COMPOSITE FILTER BED Initial fluoride concentration 10 mg/l , Bed depth:4 cm,85% RHA & 15% MO. SAMPL E NO. CONTAC T TIME minutes INITIAL FLUORID E CONC. Mg/l FINAL FLUORID E CONC. Mg/l FLUORIDE REMOVAL EFFICIENC Y( %) 1 10 10 1.3 87 2 20 10 1.25 87.5 3 30 10 0.95 90.5 4 40 10 1.2 88 5 50 10 1.45 85.5 Initial fluoride concentration 10 mg/l, Bed depth:4cm,65% RHA & 35%MO. 91
  10. 10. STUDIES ON COMPOSITE FILTER BED 0 20 40 60 80 100 0 20 40 60 FLURIDEREMOVAL EFFICIENCY(%) TIME(MINUTES) FLUORIDE REMOVAL EFFICIENCY Vs TIME MO- 15%,RHA- 85% MO- 25%,RHA- 75% MO- 35%,RHA- 65%  So optimum bed depth is fixed as 4 cm.  So MO:RHA is taken as 1:3 by 4cm bed width.  Optimum time is fixed as 30 minutes ,corresponding fluoride removal efficiency is 90% SAMPLE NO. CONTACT TIME minutes INITIAL Fl CONC. Mg/l FINAL Fl CONC. Mg/l FLUORIDE REMOVAL EFFICIENCY % 1 10 10 1.7 83 2 20 10 1.52 84.8 3 30 10 1 90 4 40 10 1.4 86 5 50 10 1.65 83.5 Initial concentration 10 mg/l ,Bed depth:4cm, 75% RHA & 25% MO. 82 83 84 85 86 87 88 89 90 91 0 10 20 30 40 50 60 REMOVALEFFICIENCY(%) TIME(MINUTES) FLUORIDE REMOVAL EFFICIENCY Vs TIME MO- 25%,RHA- 75% 101
  11. 11. STUDIES ON COMPOSITE FILTER BED  Effect of fluoride removal efficiency in the presence of chloride. Initial fluoride concentration 10 mg/l ,Bed depth:4cm, 75% RHA & 25% MO, Detention time:30 minutes. SAMP LE NO. INITIAL CHLORIDE CONC. Mg/l INITIAL FLUORIDE CONC. Mg/l FINAL FLUORIDE CONC. Mg/l FINAL CHLORIDE CONC. Mg/l FLUORIDE REMOVAL EFFICIENCY % CHLORIDE REMOVAL EFFICIENCY % 1 100 10 1.35 82.5 86.5 21 2 300 10 1.8 184.6 82 38.46 3 500 10 1.65 330.5 83.5 33.97 111
  12. 12. CONCLUSION  Identified fluoride affected areas in Kerala.  Evaluated the effectiveness of bio-adsorbents such as MO, RHA ,Vertiver for the removal of fluoride.  Composite filter bed of 4cm thick consist of 75% RHA &25% MO was designed.  Optimum time was fixed as 30 minutes for a fluoride removal efficiency of 90%.  Fabricated a compact household water treatment system for fluoride removal. 12

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