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Treatment of silk textile wastewater by       chemical coagulation,        fenton oxidation and         their combination....
Objective• To Investigate the efficiency of silk textile  wastewater treatment.
Content•   Introduction•   Methods•   Results•   Conclusions
IntroductionTextile is one of the important sectors in Thailand.      Silk is known as “Queen of Textiles”.
Introduction
Silk product community in SurinSilk worms     Silk cocoons    Boiling the silk cocoons  Reeling    Bleaching and dyeing   ...
Environmental concerns• The wastewater from bleaching and dyeing  process was not properly treated and  discharged into th...
The main problem of dyeing   wastewater treatment• How to remove the contamination  of dyes in wastewater which is  mainly...
Wastewater treatment in         dyeing industry• Biological processes• Physico-Chemical processes
Coagulation flocculation• Chemical coagulants cause formation of  a sludge phase that can be separated by  density differe...
Fenton oxidation method• Discovered by Henry John Horstman Fenton  in the1890.• Applied for the decolorization of effluent...
Fenton oxidation method• Fentons Reagent : Hydrogen Peroxide  combined with an Iron catalyst.• Creates multiple highly rea...
Method• Analysis of silk textile wastewater.• Study the optimum condition and the  treatment efficiency of   – Chemical co...
Analysis of silk textile wastewater• The silk textile wastewater from Surin  province, Thailand was used in this study.• T...
Measurements               conductrometer         pHturbidimeter
Measurements         Total solid and        suspended solid
Results     Properties of silk dyeing wastewater Parameter      Mean          SD      Standard             measureement   ...
Chemical coagulation experiment• The influence parameters for the chemical  coagulation   – Type and amount of coagulants ...
Chemical coagulation parameter      Condition                          ValueCoagulants                  0.4, 0.6, 0.8, 1.2...
The effect of pH value and types of                                           coagulants       90.6%Color removal efficien...
The effect of chemical coagulant                        dosages                  Color removal               97.1%        ...
The effect of chemical coagulant aids                      types and dosages                       97.1%            98.9% ...
The influence parameters of the        Fenton oxidation• Initial pH• Fe2SO4 dosages• H2O2 dosages
Fenton oxidation parameter Condition               ValueH 2O 2     1.2, 2.4, 3.6, 4.8, and 6.0 g/LFeSO4      0.2, 0.4, 0.6...
The effect of initial pHEfficiency (%)                                     Color removal                                  ...
The effect of the ferrous dosages                                       91.5%Efficiency (%)                               ...
The effect of the H2O2 dosages                                           90.8% 91.3%Efficiency (%)                        ...
The efficiency of silk dyeing wastewater  treatment by combination chemical   coagulation and Fenton oxidation       Chemi...
Conclusions• The chemical coagulation and Fenton  oxidation method was limited when  wastewater contains high  concentrati...
Recommendations• To compare the cost of each method.• To compare the sludge of each method.• To reduce pollution from the ...
Acknowledgement• Rajamangala University of Technology  Krungthep for financial support.
Thank you all for your attention
Silk product community in SurinSilk worms     Silk cocoons    Boiling the silk cocoons  Reeling    Bleaching and dyeing   ...
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Treatment of silk textile wastewater by chemical coagulation, fenton oxidation and their combination.

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of silk textile wastewater

  1. 1. Treatment of silk textile wastewater by chemical coagulation, fenton oxidation and their combination. Khanittha Charoenlarp,Tipanan Phangthong, Sunanta Punteaum, and Mayuree Aomsomboon Department of Textile Chemistry Engineering, Rajamangala University of
  2. 2. Objective• To Investigate the efficiency of silk textile wastewater treatment.
  3. 3. Content• Introduction• Methods• Results• Conclusions
  4. 4. IntroductionTextile is one of the important sectors in Thailand. Silk is known as “Queen of Textiles”.
  5. 5. Introduction
  6. 6. Silk product community in SurinSilk worms Silk cocoons Boiling the silk cocoons Reeling Bleaching and dyeing Weaving
  7. 7. Environmental concerns• The wastewater from bleaching and dyeing process was not properly treated and discharged into the environment.
  8. 8. The main problem of dyeing wastewater treatment• How to remove the contamination of dyes in wastewater which is mainly complex structure compound and toxic.
  9. 9. Wastewater treatment in dyeing industry• Biological processes• Physico-Chemical processes
  10. 10. Coagulation flocculation• Chemical coagulants cause formation of a sludge phase that can be separated by density difference.• Major coagulants: – Al2(SO4)3.14H2O (Alum) – FeCl3.6H2O – Fe2SO4
  11. 11. Fenton oxidation method• Discovered by Henry John Horstman Fenton in the1890.• Applied for the decolorization of effluents from the textile dyeing process. (Kim,T.H.,et al.,2004)
  12. 12. Fenton oxidation method• Fentons Reagent : Hydrogen Peroxide combined with an Iron catalyst.• Creates multiple highly reactive powerful oxidizers: – Hydroxyl radical: OH0 – Peroxide free radical: HO20 H.J.H. Fenton.J. Chem. Soc. 1894, 65, 889.
  13. 13. Method• Analysis of silk textile wastewater.• Study the optimum condition and the treatment efficiency of – Chemical coagulation – Fenton oxidation – A combination between Chemical coagulation and Fenton oxidation method
  14. 14. Analysis of silk textile wastewater• The silk textile wastewater from Surin province, Thailand was used in this study.• The properties of wastewater to be analyzed were pH, COD, BOD, SS, and TS.
  15. 15. Measurements conductrometer pHturbidimeter
  16. 16. Measurements Total solid and suspended solid
  17. 17. Results Properties of silk dyeing wastewater Parameter Mean SD Standard measureement Value valuepH (25oC) 4.16 0.2 5.5 - 9COD (mg/L) 1669.24 76.50 <120BOD (mg/L) 386.60 23.55 <20SS (mg/L) 541.60 34.16 <50TS (mg/L) 8289.60 261.87 <3000
  18. 18. Chemical coagulation experiment• The influence parameters for the chemical coagulation – Type and amount of coagulants – Type and amount of coagulant aids – Initial pH
  19. 19. Chemical coagulation parameter Condition ValueCoagulants 0.4, 0.6, 0.8, 1.2, 1.6, 2.0,(Al2SO4 and Fe2SO4) and 2.4 g/Lcoagulant aids 0.2, 0.4, 0.6, and 0.8 g/L(Ca(OH)2 and cationicpolymer)pH 5, 6, 7, 8, and 9Rapid stirring rate (rpm) 100Slow stirring rate (rpm) 20
  20. 20. The effect of pH value and types of coagulants 90.6%Color removal efficiency (%) 67.7% 1.2 g/L Al2SO4 1.2 g/L Fe2SO4 Initial pH
  21. 21. The effect of chemical coagulant dosages Color removal 97.1% COD removalEfficiency (%) 61.6% - Al2SO4 dosages (g/L)
  22. 22. The effect of chemical coagulant aids types and dosages 97.1% 98.9% 98.8%Efficiency (%) Color removal COD removal 70.8% 65.9% 61.6% 2.4 g/L Al2SO4 2.4 g/L Al2SO4 + 2.4 g/L Al2SO4 + 0.4 g/L Lime 0.4 g/L Polymer
  23. 23. The influence parameters of the Fenton oxidation• Initial pH• Fe2SO4 dosages• H2O2 dosages
  24. 24. Fenton oxidation parameter Condition ValueH 2O 2 1.2, 2.4, 3.6, 4.8, and 6.0 g/LFeSO4 0.2, 0.4, 0.6, 0.8, and 1.0 g/LpH 2,3, 4 and 5
  25. 25. The effect of initial pHEfficiency (%) Color removal COD removal initial pH
  26. 26. The effect of the ferrous dosages 91.5%Efficiency (%) 66.5% Color removal COD removal Ferrous dosages (g/L)
  27. 27. The effect of the H2O2 dosages 90.8% 91.3%Efficiency (%) 66.9% 67.5% Color removal COD removal H2O2 dosages + 0.8 g/L Fe2SO4
  28. 28. The efficiency of silk dyeing wastewater treatment by combination chemical coagulation and Fenton oxidation Chemical Fenton oxidation Coagulation + coagulation Fenton Color removal (%) COD removal (%)
  29. 29. Conclusions• The chemical coagulation and Fenton oxidation method was limited when wastewater contains high concentration of SS and COD.• The combination of chemical coagulation and Fenton oxidation were more efficient than one.
  30. 30. Recommendations• To compare the cost of each method.• To compare the sludge of each method.• To reduce pollution from the source.
  31. 31. Acknowledgement• Rajamangala University of Technology Krungthep for financial support.
  32. 32. Thank you all for your attention
  33. 33. Silk product community in SurinSilk worms Silk cocoons Boiling the silk cocoons Reeling Bleaching and dyeing Weaving

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