Bioreactor Design

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  • Slide1
  • Bioreactor Design

    1. 1. Am I Surface Water Scientist ? Specific to Hydrology, water shed, pollution but not limnology Skill towards Environmental Innovations & contribution to this emerging science Water quality to aquatic life, agricultural use and recreation & aesthetic purpose
    2. 2. Aerobic Submerged Attached GrowthBioreactor: A SuitableDevice for IntermediaryWastewater Treatment
    3. 3. Specific Objectives: To assess the organic matter degradation efficiency under different solids and salinity proportions in wastewater. To evaluate ammonia nitrogen removal capability under submerged condition of bioreactor. To find out relation between bacterial intensity and the degree of waste removal.
    4. 4. Experimental setup for the different particle size experiments
    5. 5. Experimental setup for the material comparison experiments
    6. 6. : Initial conditions of MCE (stone, glass & tire) experiment Experiment-1 Experiment-2 Experiment-3COD (mg/L) 2275 2190 4465BOD (mg/L) 330 760 1506NH3-N (mg/L) 302 1000 1730Packed bed depth (cm) 75 90 90Bacterial Density (cfu/ml) 2.3 * 104 19.2 * 104 300 * 104Total solids (mg/L) 2400 10400 15200Total suspended solids (mg/L) 26 200 985Electrical Conductivity 6060 9500 13500(µS/m)Hydraulic loading (m3 m-2 d-1) 2.0 4.0 4.0
    7. 7. Measuring parameters and instrumentsMeasured parameters Measuring instrumentsDissolved oxygen DO meter of model OM-51Chemical oxygen COD vial and Lambda 20 SpectrometerdemandAmmonia-nitrogen NH3-N electrode (5002-10C) with multi-meter model D-53Total dissolved solid OvenTotal Suspended solid Vacuum extractor and OvenElectrical conductivity Conductivity meter of model ES-51pH pH electrode (6066-10C) with multi-meterBiomass weight Electronic balanceBio-film thickness Digital caliperAir flow supply AeratorWastewater flow supply Small submergible pump
    8. 8. Sample of prepared agar for culturing bacteria
    9. 9. CFU sample collection
    10. 10. Bio-oxidation of organic matters in recirculation process
    11. 11. Nitrification trends in recirculation process
    12. 12. Bacterial performance in recirculation process
    13. 13. Overall performance in Third Cycle experiments COD% BOD% NH3-N% HC% TS% CFU 104 ECInitialvalue 4465 1506 1730 150 15200 300 13500Mixed tire 53.95 97.17 95.53 47.02 15.30Large tire 52.86 98.41 85.01 31.90 17.43Mediumtire 56.67 97.79 79.17 29.37 18.91Small tire 55.04 99.12 90.34 40.87 15.63Crumb tire 52.31 98.50 75.44 100.00 13.65Mean 54.63 98.12 87.51 37.29 16.82STDEV 1.6 0.8 7.0 8.2 1.7Stone 55.3 97.6 96.8 22.4Glass 55.0 98.7 93.1 22.6Tire 55.6 98.6 81.3 23.8Mean 55.31 98.29 90.39 22.97
    14. 14. Conclusion Aerobic submerged bioreactor has been proved to be a potential device for secondary treatment of wastewater. The rate of remediation of wastewater depends on the intensity of bacterial growth. High salinity retards the remediation process i.e. the bacterial growth.
    15. 15. Conclusion The experimental results indicate that spherical shaped. i.e. the small size tire chips are better for bio- remediation for landfill leachate treatment than rectangular shape. In submergence bioreactor clogging rate is slower than trickling filter and clogging can be eliminated through backwashing .

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