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Effect of Carbon Sources on Biological Denitrification of Wastewater by Immobilized Pseudomonas Stutzeri Bacteria in a Fluidized Bed Bio Reactor (FBBR)

Srinu Naik. SY. Pydi Setty

Department of Chemical Engineering, National Institute of Technology, Warangal-506 004, Andhra Pradesh, India

摘要:Nitrate contamination is one of the major problems in groundwater,which is increasingly becoming a threat to groundwater supplies.Nitrate in drinking water for animal and human consumption is not recommended for health reasons.The World Health Organization has set a limit of 10 mg/l NO3-for human consumption and 100 mg/l NO3-for animals.Nitrogen in groundwater results from human excreta,ground garbage and industrial effluents,particularly from food processing plants.In order to remove nitrate from wastewater the biological denitrification technology can be applied for which a carbon and energy source is needed.The addition of external carbon source helps in increasing denitrification rates and enhances the nitrogen removal.Nitrates cause cancer,methemoglobinemia (blue baby syndrome),hypertension and thyroid hypertrophy and Eutrophication in plants.Methanol,ethanol and methane were used as external carbon sources for biological denitrification of wastewater with immobilized Psuedomonas stutzeri bacteria for 150,180 and 200 ppm.The total removal efficiency was examined at different carbon sources at different levels by keeping optimized parameters such as Airflow rate:2.5 lpm,Temperature:300 C,Poly propylene beads:15 gm/lit and pH:7.The use of methanol as the carbon source resulted in the highest nitrogen removal efficiency,followed by ethanol and methane.The results suggest that the methanol is the most appropriate carbon source for denitrification of wastewater.
会议名称:

2011 2nd International Conference on Chemical Engineering and Applications(CCEA 2011)

会议时间:

2011-11-25

会议地点:

Maldives

  • 专辑:

    理工B(化学化工冶金环境矿业)

  • 专题:

    环境科学与资源利用

  • 分类号:

    X703

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